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Mach4 General Discussion / Re: Bridgeport BOSS R2E4 Retrofit
« on: June 08, 2023, 09:36:14 PM »
Hi,
kool. 250 line is 1000 count/rev, so at 3000 rpm the signal rate is 50kHz. The drives you listed are max input of 400kHz, so you could put
better encoders but you can't afford to go too far otherwise you'll not be able to signal fast enough. 2500 line or 10,000 count would be too much,
you could not signal the drives fast enough to get the servo to do 3000rpm, although you'd get away with, just, 2000 line.
I'd suggest a max of 200kHz single ended and 500kHz differential. The max signal rate to my servos is 416kHz, and so I had to use differential signalling, I tried
single ended but it started to crap out at 240kHz.
Still makes sense to te3st the encoders, if one or more are shot you really should know about it.
Craig
kool. 250 line is 1000 count/rev, so at 3000 rpm the signal rate is 50kHz. The drives you listed are max input of 400kHz, so you could put
better encoders but you can't afford to go too far otherwise you'll not be able to signal fast enough. 2500 line or 10,000 count would be too much,
you could not signal the drives fast enough to get the servo to do 3000rpm, although you'd get away with, just, 2000 line.
I'd suggest a max of 200kHz single ended and 500kHz differential. The max signal rate to my servos is 416kHz, and so I had to use differential signalling, I tried
single ended but it started to crap out at 240kHz.
Still makes sense to te3st the encoders, if one or more are shot you really should know about it.
Craig