PCC D3400 - Sector Phase-Lock-Loop Adjustment

630D
6.10.2.2 Test Procedure
The
minimum and maximum readings obtained during a 30-second observation should be
within the spindle speed limits as follows.
o 1500 rpm Models
• 39,600f.lsec (minimum)
• 40,400 f.lsec (maximum)
o 2400 rpm Models
(. 24,750fJsec (minimum)
• 25,250f.lsec (maximum)
6.10.2.3
Adjustment Procedure
If the spindle speed requirements specified are not satisfied, perform the ac motor speed
control
adjustment procedure detailed in Paragraph 6.6.3.
6.11 SECTOR PHASE-LOCK-LOOP ADJUSTMENT
The sector phase-lock-loop adjustment establishes the correct relationship between the
phase-lock-pulse signal and the Voltage Controlled Oscillator (VCO) countdown signal.
This relationship is shown in Figure 6-18.
NOTE
Each signal should be of the same frequency and should
correspond on
a cycle-to-cycle basis.
I
CHANNEL 1
TP11
CHANNEL 2
TP8
Figure 6-18. Quadrature Relationship Between Sector Phase-Lock-Loop Square Waves
6-42