Glentek Inc. 208 Standard Street, El Segundo, California 90245, U.S.A. (310) 322-3026
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APPENDIX E
E – Determining Encoder Resolution and Number of Poles.
A)
Encoder Resolution
From the MotionMaestro
©
Status menu, open the “Control Loop Signals” dialog . Check
the box that allows you to monitor “Measured” “position” of the encoder, then mark a
start position on the motor shaft. Turn the shaft 360 degrees clockwise and monitor the
encoder position in the Control Loop Signals dialog. Note the change in encoder
counts. Take the change in encoder counts per 1 revolution (360 degrees) and divide
by four (4). This is your Lines of Resolution that you will enter in your Commutation dia-
log. (Note: For better accuracy, you may rotate by 10 turns and divide by 40 instead of
4.)
Common encoder line counts include but are not limited to 250. 256. 500, 512, 1000,
1024, 2000. 2048, 2500, 4096, 5000, 8192, and 10,000 lines/revolution.
B)
Number of Poles
(Note: requires Hall sensors)
Enable the amplifier. Mark a start position on the motor shaft. You will be monitoring
the seven segment display on the amplifier as shaft is rotated. Note the lit segment be-
fore rotating the motor shaft, now turn the shaft 360 degrees clockwise. As you are ro-
tating shaft, count the number of times the seven segment display goes through a full
led rotation. Take the number of full LED cycles and multiply by two. This is the Num-
ber of Poles that you will enter in your Commutation dialog.
Appendix E
Summary of Contents for Omega SMC9930
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