Lawrence Glaister wrote: > Hi Colin, > One idea that might be worth pursuing is to build a timing regenerator. > By this I mean a chip that would accept quadrature output signals (step > type 2) from an EMC box with lousy latency numbers. The chip would then > re-time the signals limiting the acceleration to some programmable > amount. This would help avoid the deadly stalls in stepper systems from > momentary variations in the timing from the PC. This would not help PC's > with really bad latencies > a couple of hundred thousand nanoseconds. > > Geez, if you are going to go to that much trouble, and have the external device trying to GUESS what the G-code program really wants, why not do what Pico and Mesa do, which is to send a step rate to the device, and get position back, so no errors in position are introduced? If the whole idea is to fix a system that has really bad latency, I think this is a bad concept from the start.
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