Alfred Smart wrote: > I think I'm Close > > Wells Index 700 mill "old bandit control" 1978 vintage( DIY io board) > nema 42 stepper motors 1.8deg > 3 Gecko 212 running 7Amp wired half winding 10x microstep > running from mother board parallel port > 45 volt power supply > > 200 * 2.5/1 pulley ratio 5 tpi ballscrews = 2500 * 10 microstep = 25000 > INPUT_SCALE > > Dell 566 celron pc > Latency of 22000 > using DIRHOLD=2 > latency + 4.5us gecko hold time > 22000 + 6000 = 28000 BASE_PERIOD > > 1e9 / 28000 = 35714 / 2 = 17857 / 25000 = .714 ips or 42 ipm > > > > > > 1.When I rapid my Z axis (the only one i've tested) It runs > but sometimes the stepper motor does not start and just growls could > this be max accell? > Would I be better off using full winding and cutting my amperage down? > motors and power supply came with the machine, factory > Old sigma motors with no specs and cant seem to come up with them, I > have one dana motor on the Y axis that has a 7.5 amp rating > MAX_ACCELERATION = 20.0 20 Inches per second per second accel is quite fast, even in servo systems. Even with Gecko microstepping drives, this is going too far. Try 5 as a more reasonable starting value. You want to be able to hear the accelerating whine as it speeds up.
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