Spindle Drive Belt Adjustment; Spindle Motor Speed Adjustment - HP 9130K Service Manual

5-4 Maintenance
If the primary power frequency is unstable or unknown, follow these instructions:
1. Connect the frequency counter input to TP7/E7 (index) and (TP6/Ell ground).
2. Turn the spindle motor on.
3. Locate and adjust the potentiometer on the servo board until a 200ms
+
1-1
% period
is observed on the counter display. This will assure a 300 RPM spindle speed.
CAUTION
USE AN INSULATED SHANK FLAT BLADE SCREWDRIVER
OR ALIGNMENT TOOL TO AVOID SHORTING OF THE TRAN-
SISTOR LEADS ON THE TANDON DESIGN SERVO BOARD.
1
0
1
~
pJ.
)
-
9130-66500
SPEED
ADJUST
POTENTIOMETER
/
TANDON BOARD
J
Figure 5-1: Spindle Motor Speed Adjustment
Spindle Drive Belt Adjustment
This adjustment is to ensure proper drive belt tension. This adjustment should be made
whenever the drive belt or drive spindle motor is replaced.