4661
General Mach Discussion / Re: speed control of stepper used as spindle motor
« on: April 23, 2010, 06:06:51 PM »
HMM.....
For the rotary....
- Four different combinations for feedrates
- three feedrate modes
- a compensated f based on the rotational diameter
- then you have the slaving of axes
- no explanation that i can absorb easily
- the difference between setting up a stepper for use as a spindle as compared to just indexing
Then you add to that a stepper which looses torque as the speed increases thus feedrates / velocity setting are not linear , heck you can probably generate a torque to speed curve for your stepper motor from the data...
Good Grief.......it can get confusing ..... and i confuse easily
Rumor has that Simpson is going to do a write up on it all for us.
RICH
For the rotary....
- Four different combinations for feedrates
- three feedrate modes
- a compensated f based on the rotational diameter
- then you have the slaving of axes
- no explanation that i can absorb easily
- the difference between setting up a stepper for use as a spindle as compared to just indexing
Then you add to that a stepper which looses torque as the speed increases thus feedrates / velocity setting are not linear , heck you can probably generate a torque to speed curve for your stepper motor from the data...
Good Grief.......it can get confusing ..... and i confuse easily
Rumor has that Simpson is going to do a write up on it all for us.
RICH