AMCI SD17040C Gebruikershandleiding - Pagina 14

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Motor Problems

Symptom

The motor has no holding torque.

The SD17040C blinks its

FAULT

LED green when pulses are

applied to the driver, but the motor

only emits a high pitch noise. It

does not rotate.

The motor only runs in one direc-

tion.

The motor runs backwards. (CW

instead of CCW and/or CCW

instead of CW)

As its running speed increases, the

motor begins to run rough, and

eventually stops while pulses are

being applied.

The motor runs erratically.

As noted above, sometimes a problem that appears to be with the motor is actually a problem

with the indexer. The SD17040C has a Self-Test feature that allows you to verify motor opera-

tion without an indexer. With power applied to the driver, toggle the SB4-1 switch. The motor

will begin to rotate clockwise at 60 RPM. You must remove power to the driver to end the self

test. Please remember to return SB4-1 to its original position before cycling power to the driver.

Solution

1) If the Step/Fault LED is red, then a problem exists with the driver or

motor. Refer to Power Connector and Indicator LED's on page 10 for

information.

2) If the motor rotates when commanded but has no holding torque,

then your Idle Current Reduction switch is set to the To 0% setting.

This setting removes motor current when the driver is idle for more

than one second. Other idle current reduction settings are available.

See Switch Settings on page 6 for more information.

3) The SD17040C ships with the motor current set to its minimum value

of 1.0 amp. It's possible that it was not set for your application. See

Switch Settings starting on page 6 for the proper switch settings.

STEP/

1) The acceleration or starting speed 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 to a values lower than you are

expecting. For example, if the Step Resolution is set to 200 instead

of 400, the acceleration value is effectively doubled.

This problem is usually caused by the directional pulse inputs. If your

indexer is sending pulses in the CW/CCW format and the driver is config-

ured for the Step & Direction format, the motor will rotate counter-clock-

wise when the driver receives CW pulses, and it will not rotate at all when

the driver receives CCW pulses. If the indexer is sending pulses in the

Step & Direction format and the driver is configured for the CW/CCW for-

mat, the motor will only rotate clockwise, even when the indexer is com-

manding a counter-clockwise move.

1) One of the motor phases may be reversed. The "quick fix" is to

reverse the connections on the ±B windings.

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.

1) If you are using single ended outputs for your pulse and direction sig-

nals, you may have a problem with the outputs not switching fast

enough. See the note on the R

Indexer section on page 7.

2) You may have a problem with resonance in the system. Run the sys-

tem with the Anti-Resonance feature enabled and disabled to see

which give you better performance. The Anti-Resonance feature is

set with SB1-5. See page 6 for more information.

1) The motor is not correctly coupled to the load.

2) The deceleration rate is set to high and the inertia of the load is carry-

ing the motor past the point where it is supposed to stop.

3) You are performing a slow move, (under 1 revolution/second) while

the Step Resolution is set to 200 or 400 steps/turn. To correct this

problem, try increasing the indexer's starting speed parameter. Do

not increase the starting speed beyond your slowest running speed.

4) The motor current is set too low and the motor is unable to move the

load.

5) The motor is not correctly wired. Eight lead motors can be wired in

series or parallel. Series connection gives you more torque at lower

speeds and parallel connection gives you more torque at higher

speeds.

TROUBLESHOOTING

Resistor in the Connecting Your

ADVANCED MICRO CONTROLS INC.