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SERVICE BULLETIN _0292

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SERVICE BULLETIN _0292 Powered By Docstoc
					                                HAAS AUTOMATION SERVICE BULLETIN #292

To:             All Haas Dealer Principals and Service Personnel
From:           Stephen Kovinchick
Date:           May 20, 1999
Subject:        50 TAPER TRP INSTALLATION

Note: THIS BULLETIN IS FOR DEALER INFORMATION ONLY. DO NOT DISTRIBUTE.


                                         50 TAPER TRP INSTALLATION

The following sections must be completed after installation:
 • Tool Push-Out Adjustment
 • Setting TRP Switches
 • Extension Tube Installation ( if equipped with TSC)

                Tool Clamped Switch                                         Tool Unclamped Switch




                                 TRP Shims                               Fork Shims

   (1 ea.) 0.093 Nylon Washer
   (2 ea.) 0.010 Shim Washer                                                          (1ea.) 0.010 Shim Washer
                                                                                      (7ea.) 0.018 Shim Washer
   (3 ea.) 0.015 Shim Washer




                                                                              Spindle Endcap
                         TRP Fork




                  Fork Gap                                                                 Drawbar Gap




                                  Figure 3-10.. Shim and spacer location diagram.


1. Place the TRP on the machine. The TRP will rest on the spindle lift fork. Caution: Be careful of
   the spindle lift fork. Place the assembly toward the front of the machine before lowering it. The
   assembly is heavy so use great care when replacing it.
2. Install the 4 bolts, with the shim stock and spacers under the TRP.

           Part No.          Description          30-0013A (NEW) 30-0013 (OLD STYLE)

Fork:      (45-0014)         0.010 Shim Washer       1 ea.               None
           (45-0015)         0.018 Shim Washer       7 ea.               5 ea.
TRP        (45-0019)         0.093 Nylon Washer      1 ea.               1 ea.
Spacers:   (45-0017)         0.010 Shim Washer       2 ea.               2 ea.
           (45-0018)         0.015 Shim Washer       3 ea.               2 ea.

(Note: TRP Spacers: the nylon washer goes on top of the shims.)

3. If the machine is equipped with TSC, re-install the Extension Tube and Rotating Union in the
   following manner. Otherwise, skip this step.

                                                                   Purge Air
                                                                   Hose
                       High Pressure
                       Coolant Hose

                  Rotating
                    Union                                            Check
                                                                     Valve
                                                                     Assy
                 Extension
                     Tube
                                                                Drain hose



                 TRP




   a) Put a tool holder in the Spindle (this is absolutely required!!).
   b) Prevent Spindle from rotating to allow for tightening of Extension Tube (inserting a bolt into
      one of the holes in the pulley and bracing a bar against the inside of the spindle head is one
      way of doing this).
   c) Apply grease lightly to the o-ring on the end of the extension tube.
   d) Apply blue Loctite to end of extension tube threads.
   e) Insert the extension tube into drawbar. The Extension Tube has left hand threads. Tighten
      the Extension Tube and turn until the reference marks line up (there should be a paint line
      on the extension tube and on the drawbar).
   f) Check the runout of the extension tube with a dial indicator at the top of the extension tube.
      If the runout is greater than 0.010 TIR max., follow the instructions for Adjusting
      Extension Tube Runout.
   g) Slip Support Bracket over Rotating Union (check that the edge strip is intact).
   h) Lightly grease the o-ring on the Rotating Union, and install the union onto the top of the
      extension tube (it has left hand threads). Tighten using two wrenches.
   i) Install the (4) support bracket screws loosely. Allow the Rotating Union to find its own
      center. Tighten the screws carefully so the bracket does not pull to one side.
   j) Apply grease to the surface of the Rotating Union that passes through the Support Bracket.
   k) Connect the hose to the check valve assembly and the drain line hose (secure the hose with a
      cable tie so coolant drains downward to protect rotating union).

4. Plug the 3 air hoses in the TRP.
5. Plug in the clamp and unclamp switches.
6. Set the main air regulator to 85 psi.
              Note: The following two Sections must be completed.



                                 Tool Push Out Adjustment

1. Put tool holder in spindle.
2. Place machined aluminum block onto machine table. Place a clean sheet of paper under the
   block to protect the table.




                                                        Tool Holder

                                                            Sheet of
                                                             paper

                                                  Aluminum Block



                               Figure 3-11. Pushout Adjustment.

3. Jog Z-Axis down until tool holder is about 0.030 above the aluminum block. Switch to 0.001
   increments. Jog down one increment at a time until no movement can be felt in the block.
   This is our zero point. Do not press the tool release button now, this can cause a Z-Axis
   overload!!
4. The Tool Push-out adjustment is 0.060 +/-0.010. Add or remove shims from the tool release
   fork to make adjustments. The shims come in 0.010 and 0.018 thicknesses.
   Jog upward 0.060. Press and hold the tool release button, and feel for movement in the
   aluminum block.
   - If the block is tight when the button is pressed, shims may have to be ADDED to the tool
   release fork.
   - If the block is loose when the button is pressed, shims may have to be REMOVED from the
   tool release fork.
   (This is the opposite of 40 taper adjustment.)
   - If the aluminum block is tight at 0.060, release the button and jog the Z-Axis up 0.001 and
   press the tool release button again. Feel for movement in the aluminum block. Repeat this until
   movement is felt. Note the last position where the block was tight. If the position is 0.070 or
   more, add shims to the tool release fork.
   - If the aluminum block is loose at 0.060, jog the Z-Axis downward 0.001 at a time and check
   for movement in the aluminum block. If the position where the block becomes tight is 0.050 or
   less, remove shims from the tool release fork.
5. If shims were added to the TRP fork, add half that amount to the TRP spacers supporting the
   TRP. This will keep the two clearance gaps between the TRP and the rotating Spindle equal
   (approximately 0.095 each). If shims were removed from the TRP fork, remove half that
   number of shims from the TRP spacers.
6. Apply red grease to the shoulder bolts used to mount the TRP when the shim adjustments are
   complete. Use blue Loctite on the threads.


                                               Tool Unclamped
                                               Switch



                                           Fork Shims
                                                         (1ea.) 0.010
                                                         Shim Washer
                                                         (7ea.) 0.018
                                                         Shim Washer




                                                Spindle Endcap




                                Figure 3-12. Fork shim location.
         Tool Clamped Switch




                       TRP Shims
    (1 ea.) 0.093
    Nylon Washer
    (2 ea.) 0.010
    Shim Washer
    (3 ea.) 0.015
    Shim Washer




Figure 3-13. TRP shim location and TRP Switches
                                     Setting TRP Switches



                                     Tool Unclamped
                                          Switch

                          Tool Clamped
                             Switch




                          Figure 3-14. Tool Clamp / Unclamp Switches.

1. Setting the upper switch (Tool Clamped). Push the switch in slowly until it trips, then push it a
   little farther. Lock down the screws. Double-check the switch by turning on the TRP a few
   times. The bit in the Diagnostics Page should always turn on (1) when the TRP is completely
   retracted.

2. Setting the lower switch (Tool Unclamped). Use the air pressure regulator on the back of the
   machine or an extra regulator placed in line.

  a) Jog the Z-Axis to 0.030 above the aluminum block.
  b) Put a jumper across the air switch to prevent a low pressure alarm.
  c) Back off the air pressure to around 65 psi (75 psi for old style TRP’s).
  d) Press the tool release and check for movement in the aluminum block. Adjust the air pressure
     until the block is loose at 0.030 +/-0.005.
  e) While holding the Tool Release Button push the switch in until it just trips (the bit on the
     Diagnostics Page should change to “1”). Lock down the screws. Double-check the switch by
     turning the TRP on and off a few times.
  f) Back off the air pressure until the block is loose at 0.020 +/-0.005. Press the tool release
     button, the Tool Unclamped bit in Diagnostics should remain “0”. If not, repeat the above
     steps.

3. Restore air pressure to 85 psi and remove jumper.
                             Adjusting Extension Tube Runout


                                  0.005 Max TIR   Drawbar            Alignment
                                                                     Marks
                                                                        Spindle
                                                  O-Ring


                            Extension
                                Tube




                                                                     Loctite on
                                                                     Threads




1.  Place a tool holder in the spindle.
2.  Remove Extension Tube (it has left hand threads).
3.  Remove TRP.
4.  Prevent spindle rotation. Re-install the extension tube, and tighten.
5.  Use a paint pen and mark the extension tube and Drawbar with a reference mark on the side for
    later alignment.
6. Manually bend the extension tube, and check runout with a dial indicator until the runout is less
    than 0.005 TIR. (Runout will increase slightly upon removal and replacement.)
7. Remove the Extension Tube.
8. Re-install the TRP.
9. Re-install the Extension Tube (apply blue Loctite to the threads and align the marks).
10. Recheck Runout, 0.010 TIR max. (must be checked with a tool holder in the spindle).

				
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