Formax Cut-True 31A User's Manual, page 1

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Formax Cut-True 31A User's Manual, page 2
Text on page 2

Cut-True 31A Electric Guillotine Cutter

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OPERATOR MANUAL

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Formax Cut-True 31A User's Manual, page 3
Text on page 3
  1. TRANSPORTATION AND STORAGE ................................................................................................. 3 1.1.State of delivery ................................................................................................................................. 3 1.2. Cutter leveling ................................................................................................................................... 4
  2. MACHINE TECHNICAL INFORMATION .......................................................................................... 5 2.1. Destination ........................................................................................................................................ 5 2.2.Main parameters ................................................................................................................................ 5 2.2.1. Technical Data ........................................................................................................................... 5 2.2.2 Machine dimensions ................................................................................................................... 6 2.3. Construction of the machine ............................................................................................................. 7 2.3.1. Knife mechanism ....................................................................................................................... 7 2.3.2 Clamp bar mechanism ................................................................................................................. 8 2.3.3 Back gauge mechanism ............................................................................................................... 9 2.3.4 Control system ......................................................................................................................... 10
  3. PROTECTION AGAINST HAZARDS ................................................................................................ 12 3.1. Hazards to be expected ................................................................................................................... 12 3.2. Safety Rules ................................................................................................................................... 14
  4. INSTALLATION OF PAPER CUTTER .............................................................................................. 15
  5. USING THE PAPER CUTTER ............................................................................................................. 16 5.1. Backgauge ....................................................................................................................................... 17 5.2 Material pressing by clamp bar ........................................................................................................ 17 5.3 Cutting ............................................................................................................................................. 19
  6. KNIFE CHANGE, CUTTING STICK CHANGE, BACK GAUGE ADJUSTMENT .......................... 21 6.1 Knife change .................................................................................................................................... 21 6.2 Cutting stick change .......................................................................................................................... 30 6.3 Parallelism of back gauge ................................................................................................................ 32
  7. MAINTENANCE .................................................................................................................................. 33 7.1 Lubrication ....................................................................................................................................... 33 7.1.1 Knife unit lubrication ................................................................................................................ 33 7.1.2 Back gauge lubrication ............................................................................................................. 35 7.1.3.Clamp mechanism lubrication .................................................................................................. 36 7.2. Inspections ...................................................................................................................................... 38 7.2.1. General recommendation ......................................................................................................... 38 7.3. Regeneration of knife ...................................................................................................................... 38 7.3.1 The features of the blunt knife: ................................................................................................. 38 7.3.2. Grinding conditions of the cutter knife: ................................................................................... 39

7.3.3. Selection of the grinding angle ................................................................................................ 39 8.ELECTRIC DOCUMENTATION ......................................................................................................... 41 8.1 Electrical equipment ........................................................................................................................ 41 8.1.1 Electric board ............................................................................................................................ 41 8.1.2 Cutter ........................................................................................................................................ 42

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Formax Cut-True 31A User's Manual, page 4
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  1. TRANSPORTATION AND STORAGE

The Cut-True 31A is delivered assembled and ready to operate. The cutter

also includes side tables which can be installed according to the drawing below.

Drawing 1. Side tables installation

  1. Right side table
  2. Left side table
  3. Cutter body
  4. Rings ( 8 pieces.)
  5. Fixing screws( 8 pieces.)

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Formax Cut-True 31A User's Manual, page 5
Text on page 5

Drawing 2. Leveling the cutter

The cutter is not required to be attached to the floor. To ensure the cutter is level,

adjust the front left foot.

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Formax Cut-True 31A User's Manual, page 6
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  1. MACHINE TECHNICAL INFORMATION

The cutter is designed to cut p aper stacks up to 4" high. It's ideal for use in on-demand

print shops, printing houses, bookbinders and more.

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Formax Cut-True 31A User's Manual, page 7
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Drawing 3. External dimensions

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Formax Cut-True 31A User's Manual, page 8
Text on page 8

2.3. Construction of the machine

The cutter consists of three main mechanisms: knife, cla mp and back gauge drive

Drawing 4. Kinematic diagram of the knife driving mechanism (front view)

The driving mechanism for the knife is shown on Drawing 4.

1 Electric mot or

2 Emergency electromagnetic brake

4 The reducer output shaft is connected with the crank system that pulls the

knife bar, together with the knife.

5 The knife bar is shifted between the slideways (6 and 7), in a perpendicular plane to

the work table plane.

The angle of the each slideway is parallel, so when the knife moves down, it decreases

the force required for cutting, and the cutting accuracy is increased.

The knife is guided so in the bottom position the blade is parallel to the cutting stick,

and it penetrates into the stick up to 0.5 mm depth. After cutting, the knife is raised

and stops in its upper position.

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Formax Cut-True 31A User's Manual, page 9
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2.3.2 Clamp bar mechanism

Drawing 5. Kinematic diagram for the clamping bar drive mechanism (side view)

The drive mechanism for the clamping bar is shown on Drawing 5.

The electric motor (1), is stopped by emergency electromagnetic brake (2), which is

driven via the belt transmission (3), and the mechanism (4) and the clamp ing mechanism screw (5).

The clamping mechanism screw (5) dra ws the clamping bar (7) by the means of the

leverages (6), guided in the guideways (not shown on the diagram) perpendicularly to cutting line.

Using the pre-clamp foot pedal (10) allows users to lower the clamp without

The clamping bar (7) mo vement is then directly forced by the foot pedal (10) and the strands (8).

The clamping bar returns to its upright position via the spring (9).

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Formax Cut-True 31A User's Manual, page 10
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2.3.3 Back gauge mechanism

Drawing 6. Kinematic diagram for back gauge mechanism (side and top view)

The electric motor (1) drives the feed screw (3) through the belt transmission (2),

the feed screw by the nut forces the back gauge bar to its base motion.

The base (8), together with the attached back gauge bar (4), is guided on the guiding shaft (7).

The limit switches (9, 10) cause the back gauge bar (4) to stop in its extreme positions.

An accurate setting of the backgau ge bar is by the knob (5). The pulse-rotary

converter (6) is connected with the feed screw (3), which allows measuring and displaying

positions of the back gauge bar (4).

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Formax Cut-True 31A User's Manual, page 11
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Drawing 7. Operating controls

1. Red/yellow main power knob

2. Red emergency stop button, with key lock

3. Red push button, used for locking the cutter system which prevents the cutter start.

4. Green push button, starts the cutter system

6. Push both buttons to activate cutting cycle

7. Push button to activate clamp only

8. LED - red: system switched off, green: system switched on

9. Color touchscreen control panel

10. Infrared light beam safety curtain

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Formax Cut-True 31A User's Manual, page 12
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Electric boa rd with equipment /contactors, relays, over current switches, is

mounted on the hinged cover (1) as shown below.

The cover 1 is fixed by the nuts 2 in the closed position.

Drawing 8. Electric board

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Formax Cut-True 31A User's Manual, page 13
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  1. PROTECTION AGAINST HAZARDS

The potential hazards of using the Cut-True 29A are listed in the table on page 13,

along with methods to eliminate such hazards.

The safety features are shown in drawing 9, below.

In order to ensure operator safety, the cutter is equipped with two-hand safety de vices

and additio nally with the infrared safety curtain.

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Formax Cut-True 31A User's Manual, page 14
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Factors and / or danger places Identification

MECHANICAL

Levers unit of the clamping bar

Motor, belt transmission of the

Motor and levers unit of knife

clamping bar drive mechanism

Motor, belt transmission of the

pushing bar drive mechanism

Approaching movement of the

Approaching movement of the

  • double-hand protective device
  • light barrier
  • cam device supervising the

knife stopping In upper dead

Handling of the knife during its

  • transport clamps
  • special protective package

Sharp edges and corners of the

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Formax Cut-True 31A User's Manual, page 15
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  1. Uneven or rough surfaces
  • precise machining of piece
  • varnish coatings

ELECTRICAL

Direct contact of the active

  • basic protection, electrical

gear in the closed recess

Safe operation of the cutter depends on the following conditions:

Operator(s) must be trained and made aware of all potential ha zards in using the cutter. Children and untrained personnel must not be allowed to operate the cutter.

The cutter must NOT be used if:

  • The cutter is non-operational
  • Any shield has been removed from moving parts of the cutter

Every ti me, before using the cuter, the prot ective devices must be checked for proper

operation: two-hand buttons, infrared light curtain, emergency stop button.

The power supply must be swtiched OFF before any maintenance is performed.

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Formax Cut-True 31A User's Manual, page 16
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  1. INSTALLATION OF PAPER CUTTER

The cutter must be installed in a proper location to prevent hazards to the operator, including uneven floor surface, power cord tripping hazards, or inconvenient/inappropriate access to the machine.

The paper cutter is delivered with 5-wire copper cable with diameter 2. 5 mm.

The machine must be installed to electric system having 3 x 20A protectio n. The copper

wire 2.5 mm 2 must be used.

The power supply fluctuation of voltage should be in the range of 90-110%,

with frequency 50 Hz ± 2%.

The cutter can be connected to 5-wires L1, L2, L3, N, PE power supply.

Please mind the correct power supply during the first machine start up.

If after the machine start by main switch 1 (drawing 7) and pressing the green button (4)

the diode (8) lights green the connection is correct (correct rotation of motor).

If the diode (8) lights red then the connection is incorrect and 2 of 3 p hase wires must be

swapped in the power supply socket.

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Formax Cut-True 31A User's Manual, page 17
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  1. USING THE PAPER CUTTER

Drawing 10. Signaling elements on the machine’s panel.

Put the main switch (1) into the “active” position one to sw itch on t he machine.

Press the green button (2) “I” starting the cutter system (green diode (3) lights).

If there is no obstacle in the infrared light barrier zone the green diode (4) lights.

If there is any obstacle, the red diode (5) lights.

In case of an emergency, stop the cutter by pressing the red button (6).

To resume working, release the stop button (6) by rotating it pre ss b utton 2 “I".

If the control system is switched off by button 7 “O” to activate it press the button 2”I”

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Formax Cut-True 31A User's Manual, page 18
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Setting the position of backgauge is done by program module (1) or manual cran k (2).

The positioning and operation of back gauge is described in the separate

For manual movement of back gauge, press crank (2) and rotate it forward or

backward. Current dimension is shown on the display.

Drawing 11. Backgauge positioning elements.

5.2 pressing clamp bar automatically after pressing cut cycle buttons

The Material

cut material is being by clamped

1 (drawing 12, following page) .

To press the material without cutting, pr ess left cut button (1) and button (2)

on the right side which is for clamping only. The material is pressed as long as

both button s are held by operator. The clamp will release if either button is released.

The clamp force is adjusted by knob (4) of force regulator (3) (drawing 12)

Rotating the knob moves the indicator (3) in the box up when increased and down when decreased.

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Formax Cut-True 31A User's Manual, page 19
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Drawing 12. Clamp force adjustment.

The clamping force should be selected experimentally by operator according to paper

weight, size and pile height.

Please mind following rules:

The higher the pile the bigger the force needed to clamp

The wider the pile size the bigger the force needed to clamp

The heavier the paper pile the bigger the force needed to clamp

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Formax Cut-True 31A User's Manual, page 20
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5.3 Cutting

Elements of operating and signalization used during cutting shown on

Drawing 13. Operation and signalization during cutting

Before cutting, check to make sure there are no objects in the working area and if the in

addition make sure the green button 2 is pressed.

Push-buttons 3 simultaneously to engage the cutting cycle starts.

The clamp bar will and compressing the material, followed the cutting action.

Both push-buttons 3 must be kept pressed down as long as the material is cut down.

Return of the knife to its stop position, and movement of the clamp bar upward are done

Note: If the push-buttons 4 are released during the downward movement of the clamp bar

and knife, then the movement will be stopped.

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Formax Cut-True 31A User's Manual, page 21
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The Introduction of any object /ex. hand/ into the protected area by the no-contact

protective device /light barrier/ 3 cause stopping of the clamp bar and knife down

To continue the cutting cycle, the object should be removed from this protected area

and again switching-on both push-buttons 4.

  1. KNIFE CHANGE, CUTTING STICK CHANGE, BACKGAUGE

ADJUSTMENT

6.1 Knife change

It is recommended, basing on experience, to change the knife, after approximatley

8 hours of effective working.

6.1.1 Removing the knife

6.1.1.1 Press the "Options" button to the control panel and then select "Knife Change". Select

yees to turn the change knife mod on.

6.1.1.2 Press simultaneously both push-buttons 2 (drawing 14), starting the cutting

cycle. The knife stops in the lower position.

6.1.1.3 Switch-off the electric supply by rotating the main switch 4 (drawing 14) to “O”

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Formax Cut-True 31A User's Manual, page 22
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6.1.1.4 Unscrew screws 1(drawing 15) mounting the cover 2 and remove the cover

6.1.1.5 Unscrew and remove the screw 1, the first one to right side of the knife bar.

6.1.1.6 Turn on electric system by rotating the main switch 2 (drawing 16) into

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Formax Cut-True 31A User's Manual, page 23
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6.1.1.7 Turn on cutter system by pressing the green button 3.

6.1.1.8 Turn the Knife change mode off 4, following 6.1.1.1 directions.

Press simultaneously buttons 5. Knife moves to its upper position (drawing 16).

6.1.1.9 Unscrew and remove screws 1,2 (drawing.17).

6.1.1.10 After removing screws, 1 and 2), screw the blade change safety tool

(drawing 18) so as to fix the change tool and knoife to the knife bar.

6.1.1.11 Unscrew and remove the remaining clamping screws 2 from the knife bar

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Formax Cut-True 31A User's Manual, page 24
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6.1.1.12 Holding the blade change tool 1, release from the bar by rotating the handles by ½

turn to left simultaneously, and carefully guide the knife downward and out (drawing 19).

Place the removed knife into the special protective package (drawing 20), with a

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Formax Cut-True 31A User's Manual, page 25
Text on page 25

cutting edge to the inside, fix with two bolts, and unscrew the tblade change tool 1.

Drawing 20. Knife package

1 - Board 2 - Frame 3 - cover 4 - knife 5 - screws 6 – washer 7 - nut

6.1.2.1.Unscrew all adjusting screws 1 /Drawing 21/, so that their faces are hidden into

the knife bar body.

Drawing 21A – adjusting screw 1 is Lower then knife bar lobe 2 – correct position

Drawing 21B- adjusting screw 1 is higher then knife bar lobe 2 – incorrect position,

screw must be unscrewed.

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Formax Cut-True 31A User's Manual, page 26
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WARNING: The new knife must be supported by its up edge on the knife bar. Not

obeying this rule may cause machine overload and possible damage if the new

knife is higher then the old one.

Drawing 21.Adjusting screws position.

6.1.2.2. Screw the screws 1 into holes of knife 2, second from left and second from

right side. Take the knife from the package 3 (drawing 22).

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Formax Cut-True 31A User's Manual, page 27
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6.1.2.3. Holding the screws 1 put the knife 2 into the cutter, and match the blade change tool

screws into the knife bar gaps 3. (drawing 23)

Put the knife to upper position until its up edge touches the bar lobe 2 (drawing 21).

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Formax Cut-True 31A User's Manual, page 28
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6.1.2.4 Mount the knife by rotating right with force both screws 1 (drawing 24)

6.1.2.5 Input the mounting screws 2 (drawing 24)

6.1.2.6 Unscrew both screws 1 (drawing 24) and put into its position mounting screws 1,2

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Formax Cut-True 31A User's Manual, page 29
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6.1.2.7 Unscrew gently first screw from left 2 (drawing 24) paying attention the head of

screw does not stick out the knife bar slide.

6.1.2.8 Activate the "Knife Change" mode from the control panel..

6.1.2.9 Press simultaneously cutting buttons 2 (drawing 26) to start cut. Knife stops in

6.1.2.10.Turn off the power supply by rotating the main switch 3 (drawing 26) to „O”

6.1.2.11.Loosen screws 4 (drawing 26) so the knife drops down with its weight into the

full length of the cutting stick.

6.1.2.12.Mount the screws 5 (drawing 26) to maximum, until the knife blade cuts the stick

6.1.2.13. Fasten the screws 4 (drawing 26)

6.1.2.14. Turn on power supply by rotating button 3 into position "I”

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Formax Cut-True 31A User's Manual, page 30
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6.1.2.15. Turn the "Knife Change" mode off from the control panel.

6.1.2.16. Press simultaneously buttons 2. Knife moves into its upper position.

6.1.2.17. Turn off the Power supply by rotating button 5 into ”O”

6.1.2.18. Strongly fasten the first screw from the left side 2 (drawing 24)

6.1.2.19. Turn on Power supply by rotating button 3 into position "I"

6.1.2.20 Turn on electric system by pressing Green button 3 (drawing 16)

6.1.2.21 Make trial cut. If knife does not correctly cut the last page of paper pile repeat

6.1.2.22 Mount cover 2, screws 1 (drawing. 27)

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Page 30 of 45

Formax Cut-True 31A User's Manual, page 31
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6.2 Cutting stick change

The cutting quality of the stack bottom sheets and rate of the knife efffectivness, depends largely

the quality of the cutting stick. Changing or rotating the stick is recommended after each knife

change, or when the bottom sheets are found to be ripped /not completely cut/.

Drawing 28. Cutting stick change

Cutting stick 1 is introduced to a rectangular channel between the cutter tables 2 (drawing

  1. and locked in position by a pin.

To make the stick 1 change easier use screwdriver 2 (drawing 29)

The stick 1 should be place with its hole 3 on the pin in the underknife bar to prevent

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Formax Cut-True 31A User's Manual, page 32
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Drawing 29. Cutting stick removal

Drawing 30. Stick usage

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Formax Cut-True 31A User's Manual, page 33
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The stick can be turned in both directions and can be used in four positions as shown on

IMPORTANT: The chanel between the tables where the stick is assemblied has to be MGRV

6.3 Parallelism of the backgauge

Depending on the required deviation of the pushing bar 1, it is necessary to perform adjustments

shown on drawing 31.

Drawing 31 Backgauge parallelism adjustment

To adjust the pushing bar, it is necessary to:

  • loose both screws 1, fastening the pushing bar 4 to a slide;
  • loose nuts 2
  • turning with adjusting screws 3, set the pushing bar at the appropriate angle;

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Formax Cut-True 31A User's Manual, page 34
Text on page 34
  • lock the adjusting screws 3 with nuts 2;
  • tight with force screws 1.

After a trial cutting, repeat adjusting, if it is necessary, until the cutting parallelism is obtained.

6.4 False clamp

The false clamp prevents against arising imprints from the down part of the clamp on the

Drawing 32. False clamp

The false clamp is inserted under the front table as shown on the drawing 33.

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Page 34 of 45

Formax Cut-True 31A User's Manual, page 35
Text on page 35

Drawing 33. False clamp location (before fixing on the clamping beam)

In order to fix the false clamp on the clamping beam:

lay the false clamp 1 on the cutting stick 2 - radius defining the line should cover the front

false clamp surface (drawing 34)

softly press the clamping pedal 3 (drawing 34) to push the clamping a little bit down

(false clamp rods should come into the holes on the clamping beam, whole false

clamp should adhere to the clamping beam)

Use the allen key with 3 mm setting and strongly screw the screws 1 (clamping pedal

should be still pressed, drawing 35) into holes on the clamping beam to lock the

false calmp on the beam.

release the clamping pedal

When the false clamp is installed, the minimum cut will be bigger than without the clamp.

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Formax Cut-True 31A User's Manual, page 36
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Drawing 34 . Locations of the knife lubrication locations (knife in lower position)

In b ackgauge mecha nism th e fo llowing pa rts have tobe lu bricated: gu iding ro ller

(drawing 35 ) and locat ed und er th e roller screw (not ma rked on th e drawing) . The

crew should be lubricated with the non-liquid grease, on the guiding roller thin coat of

the grease should be put. Sleeves guiding the base of the backgauge grease pouring

small amount of the grease into to hole in the screw 2.

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Formax Cut-True 31A User's Manual, page 37
Text on page 37

Drawing 35 Backauge lubrication points location

The parts of the clamping mechanism have to be lubricated with non-liquid grease. In

the clamping mechanism the following parts should be lubricated: clamp bar runners

1 (drawing 36), roller bearing 2, running sleeves clamp mechanism 3, screw 4

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Formax Cut-True 31A User's Manual, page 38
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Drawing 36 Clamp bar lubrication points location

Drawing 37. Roller bearing, running sleeves clamp mechanism and pulling screw

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Formax Cut-True 31A User's Manual, page 39
Text on page 39

Drawing 38. Oil change in the reduction gear.

The reduction gear of the knife driving mechanism, shown on Drawing 38, is filled with

an oil, and such oil should be changed.

The change should be made after 5 years of intensive working.

It is recommended to use the o

il (class GL-5 or MIL-L-2105D).If the other grea

substance would be u sed it is ne cessary to observe the time of ch ange. The old

substance should be removed by unscrewing the screw 1 (drawing 38).

  • Clean carefully machine after each work-shift /paper dust/.
  • Pay attention to cleanness of the control element contacts /contactors, switches/.
  • Check correctness of the cutter screw connect necessary.

ions, and tight them, if

7.3. Regeneration of knife

Quality and accuracy of the cutting depends totally on the knife sharpness and the correct choice of the cutting edge angle.

7.3.1 The features of the blunt knife:

  • rough and uneven plane of stack to be cut;
  • edges seizing of material to be cut;
  • increased accumulation of the paper dust;

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Page 39 of 45

Formax Cut-True 31A User's Manual, page 40
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7.3.2. Grinding conditions of the cutter nife:

  • grinding machine of correct operation;
  • appropriate chosen grinding wheel
  • clean and sharp grinding wheel /”sparked out”/
  • correct chosen grinding parameters
  • even fixing of the knife

The manufacturer of knives used in the cutter re commend the cup-type grinding wheel

or grinding segments, “J” hardness, 60-80 grain size, with keeping:

  • 500 m/min grinding peripheral speed;
  • 8-10 m/min traveling speed;
  • max. Grinding Wheel stroke per 1 feed: 0,005 mm;
  • cooling with water-oil emulsion, 60 l/min., at least;

The correct sharpen knife is shown on drawing 39.

Drawing 39. Deviations and roughness of the knife.

7.3.3. Selection of the grinding angle

Depending on the cut down material, a ground off angles are between 16 o and 26 o .

Soft material needs a smaller grinding angle, whereas a hard material, a larger grinding

If the cut materials are of different hardness, then a larger grinding angle is favorable.

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Formax Cut-True 31A User's Manual, page 41
Text on page 41

Drawing 41. The cutting edge angles.

The double-chamfered cutting ang le /Drawing 41 right sid e/, for example 20/24 o ,in an

auxiliary mean and advantages the better material discharge after cutting.

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Formax Cut-True 31A User's Manual, page 42
Text on page 42

8.ELECTRIC DOCUMENTATION

Nr Symbol K1, K2, K3, K4, K7, K8 T1 1

LC1D09B7 – contactor LADC22 – contacts block

Tma 100VA 220/24V

BREVE –

TUFVASSO NS

Schneider / Legrand

CKF - 316

ZS GOT

10 INV

07 CKF

Phase asymmetry and sequence sensor Power supply of GOT control panel Controller

MDR-20-24 MITSUBISHI

FX3G-40MR/ES

FR-D720S-025- EC

MITSUBISHI

MITSUBISHI

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Formax Cut-True 31A User's Manual, page 43
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Nr Symbol Q1

Name Cam switch 25A

Emergency button

S8B S9B S15B S11N S16N S18N CZ1 CZ4 CZ5

Manufacturer Apator

BACO

BACO

BACO

XCKP2102G11

MAC6C

PCID – 4ZP

SELS

Skg 90 L4 PC

Sg 80 – 4B

Electric motor 2,2kW/1400 rev/min Electric motor 0,75kW/1400 rev/min Electric motor 0,18kW/1400 rev/min

LED diode - red LED diode green

Laser line indicator Photocell Power supply Panel

16 ZSF

GOT 1

Type 4G25-10-US25 L61QA21 Adapter Z33E Close contact module . 33E01 .33E10 L21AA03 Adapter 33E01 Close contact module 33E01 – 1 pc Open contact module – 2pcs. LZ1KA03 Adapter 333E Close contsct module 33E10 – 2 pcs

BKF458 – 12N 24V DC 32 NM 40W BKF457 – 06 24V DC 6 NM 20W

INTORQ

INTORQ

PL PL

LLM635003- D11L32AM20

CMP 07 Z - 4

KRONOS

GT 10055-QSBD

MITSUBISHI

Page 43 of 45

Formax Cut-True 31A User's Manual, page 44

Page 44 of 45

Formax Cut-True 31A User's Manual, page 45

Page 45 of 45 ยท End of manual

Quick start

  1. Install the side tables and level the cutter by adjusting the front left foot.
  2. Connect to a 5-wire L1, L2, L3, N, PE supply. If the LED lights red after start-up, swap 2 of the 3 phase wires.
  3. Turn the main switch on and press the green "I" button to start the cutter system.
  4. Set the backgauge with the touchscreen program or the manual crank; the current dimension shows on the display.
  5. Adjust clamp force with the regulator knob: higher, wider or heavier piles need more force.
  6. Check the work area is clear, then press and hold both cut buttons until the cut is complete.

Troubleshooting

ProblemLikely causeFix (from the manual)
LED lights red after first start-upIncorrect power connection (wrong motor rotation)Swap 2 of the 3 phase wires in the power supply socket. Page 16
Clamp and knife stop during the downward strokeA cut button was released, or an object entered the infrared light barrierRemove any object from the protected area and press both cut buttons again. Page 21
Bottom sheets are ripped or not completely cutWorn cutting stickRotate or change the cutting stick; it can be used in four positions. Page 31
Rough, uneven cut face, seized edges or extra paper dustBlunt knifeChange or regrind the knife. Page 39
Cut is not parallelBackgauge pushing bar out of alignmentLoosen the bar screws and nuts, set the angle with the adjusting screws, re-lock and make a trial cut. Page 33
Clamp leaves imprints on the top sheetNo false clamp fittedFit the false clamp to the clamping beam. Note the minimum cut becomes larger. Page 34

Frequently asked questions

How high a stack can the Cut-True 31A cut?

It is designed to cut paper stacks up to 4" high. See page 6.

How often should the knife be changed?

Based on experience, the manual recommends changing the knife after about 8 hours of effective cutting. See page 21.

When should the cutting stick be rotated or replaced?

After each knife change, or when bottom sheets are ripped or not fully cut. See page 31.

What safety devices does the cutter have?

Two-hand cut buttons, an infrared light curtain and an emergency stop button. Check all three before each use. See page 15.

How do I clamp paper without cutting?

Press the left cut button and the right clamp-only button together. The clamp releases when either button is released. See page 18.