Tormach PCNC 440 Manual de usuario

TECHNICAL DOCUMENT Version 0120A

OWNER'S GUIDE

PCNC440 POWER DRAWBAR

Page 1

1.1 PURPOSE

This document gives instructions on installing a PCNC440 Power

Drawbar.

1.2 PRODUCT INFORMATION

Product: PCNC 440 Power Drawbar (PN35927)

Quantity Description

1 Fitting, Male Connector 1/4 NPT to 1/4 in. PTC

(PN32212)

5 4-in. Nylon Cable Tie (PN31719)

1 Anti-Seize (PN 31273)

1 PCNC 440 Power Drawbar Button Box Assembly (PN

37293)

1 Drawbar (PN 33014)

1 Drawbar Bushing (PN33168)

1 M10 × 16 mm Shoulder Screw (PN 35926)

3 M14 Flat Washer (PN 35806)

1 M16 Flat Washer (PN 31445)

1 PCNC 440 Power Drawbar Cylinder Assembly

(PN39267)

8 Power Drawbar Spring Washer (PN 31319)

1 Quick-Release Pin (PN 37284)

Note: If any items are missing, we can help. Email

support@tormach.com to contact Tormach Technical

Support for guidance on how to proceed.

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TD10459: Owner's Guide: PCNC 440 Power Drawbar (0120A)

TECHNICAL DOCUMENT

2.1 SETUP

Complete the following steps in the order listed:

2.1.1 Required Tools 3

2.1.2 Air Requirements 3

2.1.3 Install the Power Drawbar 3

2.1.4 Adjust the Power Drawbar 8

2.1.1 Required Tools

This procedure requires the following tools. Collect them before you

begin.

lAdjustable wrench (two)

lClean cloth

lFlat-blade screwdriver

lMetric hex wrench set

lPaint pen

lPhillips screwdriver

2.1.2 Air Requirements

You must verify that the site conforms to the following air supply

requirements.

The Power Drawbar uses compressed air to release tools held in the

spindle.

lAir Pressure Between 90 psi and 120 psi (620 kPa to 825

kPa).

If the air supply is more than 120 psi (825 kPa), you must use

a regulator.

lDry Air We recommend using a compressed air dryer,

desiccator, or filter between the air compressor and the

machine.

lLubricated Air You must lubricate the air with air tool oil.

Use the FRLFilter-Regulator-Lubricator (PN 32457) or similar

for this purpose.

2.1.3 Install the Power Drawbar

Complete the following steps in the order listed:

Prepare the Machine 3

Disassemble the Original Drawbar 3

Assemble the Power Drawbar 4

Make Air Connections 6

Prepare the Machine

1. If there's already a Tormach Tooling System (TTS) tool holder

in the spindle, remove it.

2. Make sure that you can access the inside of the spindle

cabinet: jog the Z-axis down (-Z) until it is about 6 in. (15 cm)

from the machine table.

3. Power off the machine and the PathPilot controller.

a. Push in the Emergency Stop button on the operator box,

which removes power to motion control.

b. From the PathPilot interface, select Exit.

c. Turn the Main Disconnect switch to OFF on the side of the

electrical cabinet.

Disassemble the Original Drawbar

CAUTION! Loose Objects Hazard: The original drawbar

contains spring-loaded hardware, which could quickly

become loose, causing serious injury. Before

disassembling the original drawbar, you must put on

safety eyewear that meets ANSI Z87+.

1. Put on safety eyewear.

2. Open the spindle door.

3. While using one hand to support the Tormach Tooling System

(TTS) collet, use the other to turn and remove the original

drawbar.

4. Set the collet and the original drawbar aside.

5. While using one hand to hold the spindle lock arm, use the

other to remove the spindle lock arm pivot screw with a 6 mm

hex wrench.

Figure 2-1: Spindle lock arm pivot screw removed from the

original drawbar assembly.

Note: The spindle lock arm assembly contains spring-

loaded hardware, which could quickly become loose.

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TD10459: Owner's Guide: PCNC 440 Power Drawbar (0120A)

TECHNICAL DOCUMENT

6. Remove the spindle lock arm pivot bolt with a 6 mm hex

wrench. Then, remove the spindle lock arm.

7. Remove the spindle lock base and its components with a 5

mm hex wrench.

Figure 2-2: Spindle lock base from the original drawbar

assembly.

Note: Keep all components for future use. The

original drawbar, drawbar bushing, and spindle lock

are all required to operate the machine if you later

decide to remove the Power Drawbar.

8. Wipe all exposed drawbar mounting surfaces inside the

spindle motor cabinet with a clean cloth.

Figure 2-3: Mounting surfaces to clean inside the spindle

motor cabinet.

Assemble the Power Drawbar

1. Find the drawbar that you set aside in "Disassemble the

Original Drawbar" (on the previous page).

2. Remove the drawbar bushing from the drawbar, and set it

aside.

3. Put Anti-Seize (provided) on the bottom of the drawbar head.

4. Find the eight spring washers provided.

5. Move one spring washer on the drawbar, with the convex side

of the spring washer toward the drawbar head.

Figure 2-4: Convex side of the spring washer toward the

drawbar head.

6. Move another spring washer on the drawbar, with the

concave side of the spring washer toward the concave side of

the spring washer from Step 5.

Figure 2-5: Concave sides of two spring washers together.

7. Put Anti-Seize on the edge of the contact surface between the

pair of spring washers that you put on the drawbar in Steps 5

and 6.

8. Repeat Steps 5 through 7 for the remaining six spring

washers. Make sure that you put Anti-Seize on the spring

washers at every contact point.

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TD10459: Owner's Guide: PCNC 440 Power Drawbar (0120A)

TECHNICAL DOCUMENT

9. Examine the stack of spring washers. Make sure that all eight

spring washers are on the drawbar and arranged in four sets

of opposing pairs.

Figure 2-6: All eight spring washers on the drawbar.

10. Find the drawbar bushing that you set aside in Step 2, and put

it on the drawbar. Make sure that the smaller diameter of the

drawbar bushing is toward the bottom of the drawbar.

11. Put Anti-Seize on the top of the drawbar bushing.

12. Put Anti-Seize on the bottom threads of the drawbar.

Figure 2-7: Locations to apply Anti-Seize on the drawbar

assembly.

13. Put Anti-Seize on the outside taper of the Tormach Tooling

System (TTS) collet. Make sure that there is no Anti-Seize on

the inside of the collet.

14. Put the drawbar assembly into the spindle.

15. While using one hand to insert the collet into the spindle, use

the other to turn the drawbar into the collet.

Figure 2-8: Drawbar assembly installed in the spindle

motor cabinet.

16. Hand-tighten the drawbar.

17. While using one hand to insert an empty Tormach Tooling

System (TTS) tool holder into the collet, use the other to

tighten the collet into the drawbar with an adjustable wrench.

18. Use two large, adjustable wrenches to tighten the Power

Drawbar until the spring washer stack is compressed to a

height of 3/4 in. (20 mm).

Figure 2-9: Correctly compressed spring washer stack.

Note: Later in this procedure, after you complete the

initial installation, you'll do a final drawbar tension

adjustment. For more information, see "Adjust the

Drawbar Tension" (page9).

19. Find the Power Drawbar cylinder assembly provided.

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TD10459: Owner's Guide: PCNC 440 Power Drawbar (0120A)

TECHNICAL DOCUMENT

20. Identify the Power Drawbar mounting surfaces inside of the

spindle motor cabinet, as shown in the following image.

Figure 2-10: Power Drawbar mounting surfaces inside of

the spindle motor cabinet.

21. Put the Power Drawbar cylinder assembly on the mounting

surface.

Figure 2-11: Power Drawbar cylinder assembly inside of

the spindle motor cabinet.

22. Find the M10 × 16 mm shoulder screw provided, and then put

Anti-Seize on its threads.

23. Install the M10 × 16 mm shoulder screw on the Power

Drawbar cylinder’s mount plate with a 5 mm hex wrench.

The unit, which floats by design, is now securely installed to

the spindle head.

Figure 2-12: M10 × 16 mm shoulder screw installed on the

Power Drawbar cylinder's mount plate.

24. Find the quick-release pin provided, and then insert it into the

Power Drawbar cylinder’s mount plate.

The quick-release pin allows the Power Drawbar cylinder to

pivot within the spindle motor cabinet.

Figure 2-13: Quick-release pin inserted into the Power

Drawbar cylinder's mount plate.

Make Air Connections

Note: If you have an (optional) Automatic Tool Changer

(ATC), install it now. Go to Install the Install the .

1. Remove two M5 × 15 mm socket head cap screws securing

the coolant hose mount bracket to the mill head with a 4 mm

hex wrench. Then, set aside the coolant hose mount bracket.

Figure 2-14: Coolant hose mount bracket on the mill head.

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TD10459: Owner's Guide: PCNC 440 Power Drawbar (0120A)

TECHNICAL DOCUMENT

2. Find the button box assembly provided, which includes the

following:

Quantity Description

6 ft Tube, 1/4 in. OD, Nylon (PN31457)

2 Tube, 5/32 in. OD, Nylon (PN35922)

1 Bracket (PN37333)

1 Button Box Base (PN37291)

1 Button Box Cover (PN37292)

2 Nut, Hex, M5 × 0.8 (PN 31201)

7 M5 × 6 mm Phillips Head Machine Screw

(PN37299)

2 Screw, Socket Head Cap, M5 × 0.8 - 12 mm (PN

31353)

1 Power Drawbar Button (PN37296)

3. Install the button box base on the mill head with two M5 × 6

mm Phillips head machine screws. Make sure that it's flush

with the bottom of the spindle cabinet, as shown in the

following image.

Figure 2-15: Button box base installed on the mill head.

4. Remove the push button cap and the O-ring from the Power

Drawbar button.

Figure 2-16: Power Drawbar button.

5. Put the Power Drawbar button in the button box base, and

then secure it in place with the O-ring and the push button

cap that you removed in Step 4.

6. Find the coolant hose mount bracket that you set aside in Step

1. Then, install it to the button box cover with two M5 × 12

mm socket head cap screws and two M5 nuts. Set aside the

button box cover assembly.

Figure 2-17: Coolant hose mount bracket installed on the

button box cover.

7. Connect one end of the 5/32-in. plastic tube to the Retract

port on the Power Drawbar button.

Figure 2-18: Power Drawbar button air line routing.

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TD10459: Owner's Guide: PCNC 440 Power Drawbar (0120A)

TECHNICAL DOCUMENT

8. Route the loose end of the Retract air line to the Power

Drawbar cylinder, and then connect it to the lowest elbow

fitting.

Figure 2-19: Retract fitting on the Power Drawbar cylinder.

9. Connect one end of the remaining 5/32-in. plastic tube to the

Extend port on the Power Drawbar button.

10. Route the loose end of the Extend air line to the Power

Drawbar cylinder, and then connect it to the top tee fitting.

Figure 2-20: Extend fitting on the Power Drawbar cylinder.

11. Use the five cable ties to secure both air lines together.

12. Connect one end of the 1/4-in. plastic tube to the Air Supply

push-to-connect elbow on the Power Drawbar button.

13. Route the loose end of the 1/4-in. plastic tube out of the

enclosure and toward the air compressor.

14. Put the 1/4-in. push-connect air fitting adapter on the loose

end of the 1/4-in. plastic tube.

15. Route the 1/4-in. plastic tube to your shop's air supply and

connect it with the adapter.

16. Replace the button box cover that you set aside in Step 6 with

a Phillips screwdriver and four M5 × 6 mm Phillips head

machine screws.

17. Remove the M6 × 12 mm socket head cap screw from the mill

head and set it aside.

Figure 2-21: M6 × 12 mm socket head cap screw to

remove.

18. Install the bracket on the button box cover with one M5 × 6

mm Phillips head machine screw.

19. Install the opposite side of the bracket to the mill head with

the M6 × 12 mm socket head cap screw that you set aside in

Step 17.

Figure 2-22: Bracket installed on the Power Drawbar

button box and the mill head.

2.1.4 Adjust the Power Drawbar

After installing the Power Drawbar, you must adjust it.

NOTICE! After the initial installation, you must complete a

final drawbar tension adjustment. For more information, see

"Adjust the Drawbar Tension" (on the next page). If you don't

complete a drawbar tension adjustment, there's a risk of tool

pull-out.

Complete the following steps in the order listed:

Adjust the Drawbar Tension 9

About Drawbar Tension 9

Adjust the Initial Setup 9

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TD10459: Owner's Guide: PCNC 440 Power Drawbar (0120A)

TECHNICAL DOCUMENT

Adjust the Drawbar Tension

This adjustment sets the highest possible drawbar tension while

still allowing the Power Drawbar cylinder to release the tool. For

information, see "About Drawbar Tension" (below).

NOTICE! After the initial installation, you must examine the

drawbar tension weekly. During periods of heavy use, examine

the drawbar tension more frequently. If you don't, there's a

risk of tool pull-out.

To adjust the drawbar tension:

1. Put an empty Tormach Tooling System (TTS) tool holder into

the collet.

2. While using one hand to support the tool holder, use the other

to push the Release Tool button.

3. Dependingon whether the tool holder releases or not, do one

of the following:

lIf the Tool Holder Releases Tighten the Power Drawbar

in quarter-turn increments with two adjustable wrenches.

After each turn, push the Release Tool button. Stop when

the tool holder does not release. Then, loosen the Power

Drawbar one quarter-turn with two adjustable wrenches.

lIf the Tool Holder Doesn't Release Loosen the Power

Drawbar in quarter-turn increments with two adjustable

wrenches while pushing the Release Tool button. Stop

when the tool holder releases.

4. Make a visual reference to help you set or adjust the drawbar

tension in the future: use a paint pen to make a witness mark

on both the head of the drawbar and the end of the spindle.

About Drawbar Tension

While machining, the Tormach Tooling System (TTS) collet holds a

Tormach Tooling System (TTS) tool holder in the spindle by applying

a clamping force to both the shank and the shoulder of the tool. The

tension force that is applied to the drawbar pulls the Tormach

Tooling System (TTS) collet into the spindle taper, which then

applies the clamping force to the Tormach Tooling System (TTS)

tool.

The force on the drawbar — known as drawbar tension — is applied

differently depending on the tool changing method:

lAutomatic (using the Power Drawbar) Tension is applied

by the compressed spring washers.

lManual Tension is applied when you tighten the drawbar into

the collet using a wrench.

Adjust the Initial Setup

In this adjustment, you'll verify that there's enough clearance

between the end of the drawbar and the Power Drawbar cylinder.

NOTICE! If you don't do this adjustment, there's a risk that the

drawbar can loosen, or that operations can be louder than

normal.

1. Examine the space between the hex head screw on the Power

Drawbar cylinder's rod and the top of the drawbar.

Figure 2-23: Correctly spaced drawbar and Power Drawbar

cylinder.

2. Verify that the gap is between 3/64 in. and 1/8 in. (1 mm and

3 mm). Depending on the size of the gap, do one of the

following:

lBetween 3/64 in. and 1/8 in. (1 mm and 3 mm) You

have completed adjusting the initial setup. Go to

"Operation" (page11).

lLess Than 3/64 in. (1 mm) Go to Step 3.

3. Disconnect the shop's air supply from the Power Drawbar

button.

4. Pull out the quick-release pin.

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TD10459: Owner's Guide: PCNC 440 Power Drawbar (0120A)

TECHNICAL DOCUMENT

5. Pivot the Power Drawbar cylinder assembly to the left so that

you can access the Power Drawbar cylinder's rod.

Figure 2-24: Power Drawbar cylinder pivoted to the left.

6. Remove the hex head screw on the Power Drawbar cylinder’s

rod with an adjustable wrench, and set it aside.

Figure 2-25: Hex head screw on the Power Drawbar

cylinder's rod.

7. Remove the M16 washer from the Power Drawbar cylinder’s

rod, and set it aside.

Figure 2-26: M16 washer removed from the Power

Drawbar cylinder's rod.

8. Put the hex head screw back in, and then tighten it completely

with an adjustable wrench.

9. Pivot the Power Drawbar cylinder to the original location.

10. Push in the quick-release pin.

11. Reconnect the shop's air supply to the Power Drawbar button.

12. Examine the space between the hex head screw on the Power

Drawbar cylinder’s rod and the top of the drawbar.

13. Verify that the gap is between 3/64 in. and 1/8 in. (1 mm and

3 mm). Depending on the size of the gap, do one of the

following:

lBetween 3/64 in. and 1/8 in. (1 mm and 3 mm) You

have completed adjusting the initial setup. Go to

"Operation" (page11).

lLess Than 1/8 in. (1 mm) Go to Step 14.

14. Find the three provided M14 flat washers.

15. Put one M14 flat washer under each mounting post on the

Power Drawbar cylinder.

Page 10

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TD10459: Owner's Guide: PCNC 440 Power Drawbar (0120A)

TECHNICAL DOCUMENT

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