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TABLE OF CONTENTS
HAAS
AUTOMATION, INC.
TROUBLESHOOTING
S E R V I C E M A N U A L
VF-S
ERIES
3.3 ACCURACY/BACKLASH
Accuracy complaints are usually related to tooling, programming, or fixturing problems. Eliminate these possibilities before
working on the machine.
´
Poor mill table-positioning accuracy.
l
Check for a loose encoder on the servo motor. Also, ensure the key in the motor or the lead screw is in place and the
coupling is tight.
l
Check for backlash in the lead screw as outlined below:
INITIAL PREPARATION -
Turn the VMC ON. ZERO RET the machine and move the mill table to the approximate center of its travel in the X and Y
directions. Move the spindle head to approximate center of the Z-axis travel, also.
CHECKING X-AXIS:
1. Set up a dial indicator and base on the mill table as shown in Fig. 3-1.
Fig. 3-1 Dial indicator in position to check X-axis.
2. Set dial indicator and the Distance to go display in the HANDLE JOG mode to zero as follows:
- Zero the dial indicator.
- Press the MDI button on the control panel.
- Press the HANDLE JOG button on the control panel.
The Distance to go display on the lower right hand corner should read: X=0
Y=0
Z=0
3. Set the rate of travel to .001 on the control panel and jog the machine .010 in the positive (+) X direction. Jog
back to zero (0) on the display. The dial indicator should read zero (0) ± .0001.
4. Repeat step three in the negative (-) direction.
TOTAL DEVIATION BETWEEN THE DIAL INDICATOR AND THE CONTROL PANEL DISPLAY SHOULD NOT EXCEED .0002.
Summary of Contents for VF-SERIES
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Page 235: ...96 8100 1 15 96 232 VF SERIES S E R V I C E M A N U A L ASSEMBLY DRAWINGS VF 1 COLUMN ...
Page 237: ...96 8100 1 15 96 234 VF SERIES S E R V I C E M A N U A L ASSEMBLY DRAWINGS VF 1 LEADSCREW ...
Page 239: ...96 8100 1 15 96 236 VF SERIES S E R V I C E M A N U A L ASSEMBLY DRAWINGS VF 3 COLUMN ...
Page 241: ...96 8100 1 15 96 238 VF SERIES S E R V I C E M A N U A L ASSEMBLY DRAWINGS VF 3 LEADSCREW ...
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