Specifications

20 Gear Drive, Plymouth Ind. Park, Terryville, CT 06786
Tel: [phone] Fax: [phone] http://www.amci.com
TROUBLESHOOTING
C
55
Troubleshooting Tables (continued)
Motor Problems
Indexer Problems
Symptom Solution
The motor has no holding torque.
1) If any of the Indicator LED’s are on, other than the POWER LED,
refer to the Indicator LED’s table on the preceding page.
2) If the motor rotates when commanded but has no holding torque,
then your Idle Current Reduction switches are set to the To 0% set-
ting which removes motor current when the drive is idle for more
than one second. See figure 3.3, Motor Switch Settings on page 19
for information on setting the Idle Current Reduction switches.
3) The SD17063 ships with all switches set to zero. If the Motor Cur-
rent switches (SB3-5 and SB4) are left at zero, the Motor Current
equals zero amps. See figures 3.6 through 3.8, Motor Current Set-
tings starting on page 24 for the Motor Current settings.
The motor is running faster/slower
than expected and/or the distance
traveled is father/shorter than
expected.
Most likely a problem with the SD17063’s Step Resolution setting or
the indexer’s programming. If the motor is running too fast, either the
Step Resolution on the SD17063 (SB3-1/2/3/4) is set too low, or the
indexer programmer assumed a higher step resolution then the drive is
set for when determining the total number of pulses to apply to the
motor. If the motor is running slow, the Step Resolution is set too high
or the indexer programmer assumed a lower step resolution.
The SD17063 and motor work fine
in Self Test mode, but the motor
does not run when pulses are
applied from the indexer.
1) The acceleration values may have been set too high when the indexer
was programmed. The motor may start to accelerate and stall as the
acceleration increases.
2) The Step Resolution may be set too low. (See previous problem.)
This will have the same effect as setting the acceleration to high.
The motor only runs in one direc-
tion.
This problem is usually caused by the directional pulse inputs. If your
indexer is sending pulses in the CW/CCW format and the drive is con-
figured for the Step/Dir format, the motor will rotate counter-clockwise
when sending CW pulses, and will not rotate at all when sending CCW
pulses. If the indexer is sending pulses in the Step/Dir format and the
drive is configured for the CW/CCW format, the motor will only rotate
clockwise, even when the indexer is commanding a counter-clockwise
move.
The motor runs backwards. (CW
instead of CCW and/or CCW
instead of CW)
1) One of the motor phases may be reversed. This is most commonly
the problem with converting from a SD8055 to a SD17063 because
the sense of the ±B phase is reversed between the two drives.
2) There may be a problem with the directional inputs. Either they are
wired incorrectly or the format is wrong. Check wiring and see the
previous problem for more information on problems with format.
Symptom Solution
My indexer/PLC reports a fault
from the SD17063 when everything
seems fine.
Your logic maybe reversed. On the SD17063, the Fault Output is on
(conducts current) when the drive is working correctly and turns off
(stops current flow) when there is a fault with the drive. Therefore, los-
ing power to the drive appears as a fault. If you’re expecting the fault
output to turn on and conduct current when there is a fault, then your
logic is reversed. This problem is most common when converting from
a SD8055 to a SD17063 because the fault logic between the two is
reversed. The fault output on the SD8055 does turn on when there is a
fault, not off as it does with the SD17063.