Jump to content
OMRON Forums

Counts per commutation cycle


PEERPSI
 Share

Recommended Posts

Based on the example for Ixx71 below I calculate my counts to be

30.48 mm/cycle*line/.0001379*128 counts/line=28291806 which is more then 11,000,000 then the maximum allowed per variable range limits.

 

My hardware is Turbo PMAC2 Clipper, ACC-51S interpolator, scale with a .1379 micrometer period and my motor has a 30.48 pole pitch.

 

What are my options?

 

Ixx71 Motor xx Counts per N Commutation Cycles

Range: 0 – 16,777,215

Units: counts

Default: 1000

 

2. A linear motor has a 60.96-mm (2.4-inch) electrical cycle. An encoder with a 40 micron pitch is

wired directly into PMAC and “times-4” decode is used. Ixx70 can be set to 1 and Ixx71 can be

calculated as:

Ixx71=60.96mm/cycle*line/.04mm*4 counts/line=6096 counts/cycle

Link to comment
Share on other sites

  • Replies 2
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

I might be wrong (I have had my head up my a** all day), but I think your encoder is 128 nanometer line pitch, and with x4 decode your hardware pitch is 32 nanometers. So for a 60.96mm motor pitch, you have 60960000 nm / 32 nm = 1,905,000 hardware counts per cycle. As your example that you posted says, the commutation routine ignores the intepolated counts and only uses the "hardware" counts
Link to comment
Share on other sites

Guest
This topic is now closed to further replies.
 Share


×
×
  • Create New...