R
ESULTS OF
R
EPEATABILITY
T
ESTING
Results in Flywheel mode
The display shows DevCC a full revolution of the cutter head.
The reading is in milliseconds, to the third decimal place, i.e.
0.010 is 0.01 milliseconds (or 10 microseconds). If the reading
exceeds 0.200 there is a problem with the cutter drive. If this
occurs the error is too large and there is a problem in the cut-
ter drive that must be corrected.
Results in Timer mode
When testing repeatability in Timer mode, the cutter is making
on-demand cuts at a set time interval (i.e. one-second inter-
vals). The display shows the cut-to-part (CP) reading and the
cut-to-cut (CC) reading. The reading is in milliseconds, to the
third decimal place, i.e. 0.010 is 0.01 milliseconds (or 10
microseconds).
CP is the peak time variance between the cut signal output
(preset time) to the servo amplifier, and the programmable
limit switch just prior to the center of the bushing. This is the
repeatability of the cutting system to accelerate through the
part. This value is higher than the CC reading since it includes
the acceleration and deceleration contributed by the servo
motor.
CC is the peak time variance between cuts. Record and com-
pare the cut-to-cut number to the CC value recorded in
encoder or product mode shows how much error is by external
influences (i.e. variation in belt puller speed, encoder mount-
ing problem, etc.).
If the reading exceeds 0.200, there is a problem with the cutter
drive. If this occurs the error is too large and there is a definite
problem that must be corrected.
Results in Product mode
The display shows the cut-to-part (CP) reading and the cut-to-
cut (CC) reading. The reading is in milliseconds, to the third
decimal place, i.e. 0.010 is 0.01 milliseconds (or 10 microsec-
onds).
Compare the cut-to-part (CP) reading to the CP reading in the
other modes. There should be very little difference in these
readings.
Compare the cut-to-cut (CC) reading to the CC reading in the
other modes. Since the product mode is influenced by external
signals, this reading will reflect the speed regulation of the
puller.
T
ROUBLESHOOTING
6-20
CSC Combination Puller/Cutter
UGE048/1103
