VMC - 50-Taper - TRP - Height Adjustment

Applies to machines built from: 
October, 2015

VMC - 50-Taper - Tool-Release Piston (TRP) - Height Adjustment

This procedure tells you how to adjust the height of the TRP in a VMC that has a 50-Taper spindle. This is also known as TRP "push-out" adjustment.

Prerequisites

Center the table under the Z Axis.

Step 1

Center the table under the Z Axis.

Put a toolholder [1] with no cutting tool into the spindle.

Put a piece of paper [2] on the table to protect the table.

Put the aluminum block [3] on the piece of paper.

Step 2

Jog the Z Axis in the negative (-) direction until the toolholder is approximately 0.30" (8 mm) from the top of the block.

Step 3

Push .001/1.
Jog the Z Axis in the negative (-) direction one increment at a time. Jog until the toolholder lightly touches the block.

The block can move in the X and Y axes, but not in the Z Axis.

caution: Do not push the tool-release button. This causes a Z-Axis overload.

Step 4

Push POSIT to show the Position display.

Push ORIGIN to change the position display to zero.

Step 5

Push .01/10.
Jog the Z Axis in the positive (+) direction 0.06" (1.52 mm) above the block.

Step 6

Push and hold the tool-release button.
With moderate force, try to move the aluminum block. If the block does not move, go to Step 7.

If the block moves:
Jog the Z Axis in the negative (-) direction 0.01” (0.254 mm) one increment to 0.05" (1.27 mm) above the block.
Push and hold the tool-release button.
Try to move the aluminum block. If the block moves, do this step again until you cannot move the block. Record the number of increments you must move the spindle until you cannot move the block. The number of increments is the number of 0.010" shims to remove from the TRP fork.
note: This is the opposite of the 40-taper TRP adjustment. For the 40‑Taper TRP the number of increments is the number of shims to add.

Step 7

Release the tool-release button.
Push .01/10.
Jog the Z-axis in the positive (+) direction 0.01” (0.254 mm) one increment to 0.07" (1.78 mm) above the block.

Step 8

Push and hold the tool-release button.

Try to move the aluminum block. If the TRP is the correct height, the block can move when you apply moderate force.

If the block does not move:

Release the tool-release button.
Jog the Z Axis in the positive (+) direction 0.01” (0.254 mm) one increment to 0.08" (2.03 mm) above the block.
Push and hold the tool-release button.
Try to move the aluminum block. If the block does not move, do this step again until you can move the block. Record the number of increments you must move the spindle to let the block move. The number of increments is the number of 0.010" shims to add to the TRP forks.
note: This is the opposite of the 40-taper TRP adjustment. For the 40‑Taper TRP the number of increments is the number of shims to remove.

50-Taper - Tool-Release Piston - Shim Installation

Step 1

Use this table to find the correct number of 0.010" shims for the TRP fork to add or remove. Use the number of increments you recorded in the "Height Adjustment section" to get the correct amount of push out.

Number of increments recorded Shims for the TRP Fork Shims for the TRP Spacers
If the block moved. X Remove (X x 1) shims for the TRP fork. Add ( X / 2) shims for the TRP spacers.
If the block moved. Example: 2 Remove (2 x 1 = 2) shims for the TRP fork. Add (2 / 2 = 1) shims for the TRP spacers.
If the block did not move. X Add (X x 1 ) shims for the TRP fork. Remove (X /2) shims for the TRP spacers.
If the block did not move. Example: 2 Add (2 x 1= 2) shims for the TRP fork. Remove (2 /2 = 1) shims for the TRP spacers.

note: The TRP fork shims are 0.010" and 0.018". Be sure to measure the shims that you remove or add.

Step 2

If the block moves:

Record the number of increments you moved the spindle to let the block move. The number of increments is the number of 0.010" shims to add to the TRP fork.

note: This is the opposite of the 40-taper TRP adjustment. For the 40‑Taper TRP the number of increments is the number of shims to remove.

Step 3

If the block does not move:

Record the number of increments you moved the spindle until you could not move the block. The number of increments is the number of 0.010" shims to remove from the TRP fork.
note: This is the opposite of the 40-taper TRP adjustment. For the 40‑Taper TRP the number of increments is the number of shims to add.

Step 5

Remove the TRP fork [3], shims [2] and spacers [3] from the TRP.

Step 6

Put the correct number of fork shims [2] between each of the spacers [1] and the TRP fork [3]. Add the TRP shims in the next step.

Step 7

TRP Spacers

Make a stack (1) that has the nylon washer (3), the correct number TRP shims [4] and the spacer [5] in the sequence shown.

Put the stack on one of the TRP bolts [2]. This aligns the shims, washers and spacers [6].

Use electrical tape [8] to hold the stack [7] together. The tape holds the shims and washer in position when you install the TRP.

Use the tape to make (4) equal stacks of shims for the TRP.

Step 8

Install the TRP. Refer to the correct procedure:

Do the "VMC - 50-Taper - Tool-Release Piston (TRP) - Height Adjustment" and the "50-Taper - Tool-Release Piston - Shim Installation" until the height of the TRP is correct.

When the height of the TRP is adjusted correctly, install the TSC union and extension tube, if removed.

VMC - 50-Taper - Tool Release Piston (TRP) - Single Switch - Adjustment

This procedure tells you how to adjust the single TRP switch. TRP pistons made after October 2015 do not have an adjustable TRP Switch

Step 1

Push PARAM/DGNOS (2) times.

Push the RIGHT cursor arrow to go to the I/O tab.

Make sure that Draw Bar Open = 0 and that Draw Bar Closed=1.

Step 2

Push and hold the tool release button.

Find the nut for the adjustment. Use a wrench [1] to turn the nut.

Turn the nut until the light on the switch [2] goes off.

Turn the nut 1/4 of a turn in the same direction.

Release the tool release button, the light goes on [3]. The switch is adjusted correctly.

Step 3

Push the tool release button (2) or more times.

Make sure that the light [2] on the switch goes off [2] with each button push.

Step 4

Push PARAM/DGNOS.

Push the RIGHT cursor arrow until the I/O tab shows.

Make sure Draw Bar Closed = 1.
note: In a single switch TRP, the Draw Bar Closed field does not change from 1

Step 5

Jog the Z Axis in the negative (-) direction 0.01" (0.254 mm) to 0.05" (1.27 mm) from the block.

Push the tool release button.

Make sure that Draw Bar Open = 0.

Jog the Z Axis in the negative (-) direction 0.01" (0.254 mm) to 0.06" (1.524 mm) from the block.

Push the tool release button.

Make sure that Draw Bar Open = 1.

If the adjustment of the switch is correct, Draw Bar Open = 1 at 0.06" (1.52 mm) and = 0 at 0.05" (1.27 mm). If the adjustment is not correct, do Steps 2 and 3 again.

Be aware: Many service and repair procedures should be done only by authorized personnel. The service technicians at your Haas Factory Outlet (HFO) have the training, experience, and are certified to do these tasks safely and correctly. You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes.

Danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not completely understand. Contact your Haas Factory Outlet (HFO) and schedule a service technician visit if you have any doubts about doing a procedure.

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