50-Taper - Tool Release Piston - Height Adjustment

Last updated: 11/27/2018

50-Taper - TRP - Height Adjustment - VMC

Tools Required

ENCODER RING PROTECTOR, 50T NCE (T-0078)

VMC - 50-Taper - TRP - Height Adjustment

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.

2

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

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.

4

Push [POSIT] to show the Position display.

Push [ORIGIN] to change the position display to zero.

5

Push [.01/10].

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

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, repeat this step 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.

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.

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, repeat this step 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 - TRP - Height Adjustment - Shim Installation

1

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.

2

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.

3

Remove the TRP. Refer to: VMC- 50-Taper Tool Release Piston - Replacement

Use the ENCODER RING PROTECTOR, 50T NCE (T-0078) [1] if equipped with a non-contact encoder to prevent damage to the encoder ring [2].

4

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

5

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

6

TRP Spacers

Make a stack [1] that has the nylon washer [3], 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.

7

Install the TRP. Refer to: VMC- 50-Taper Tool Release Piston - Replacement

Repeat 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.

50-Taper - TRP - Single Switch - Adjustment

1

Push [PARAM/DGNOS] (2) times.

Navigate to the I/O tab.

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

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.

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.

4

Push [PARAM/DGNOS].

Navigate to the I/O tab.

Make sure Draw Bar Closed = 1.

Note: In a single switch TRP, the Draw Bar Closed field does not change from 1.

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, repeat Steps 2 and 3.