On 1/8/19 9:48 PM, smf wrote: > On 06/01/2019 13:16, Gerrit Heitsch wrote: > >> >> A drive that turns on the motor without the drive select line being >> active too has a design flaw. Properly designed drives would let you >> control the motor only if the DS line is active too. > > That would require you to interrupt communication with one drive while > starting or stopping the motor on another. > > As starting a motor takes an appreciable amount of time, it makes sense > to overlap them. > > If starting the motor while the drive isn't selected causes problems, > then that is a design error. It doesn't cause problems, it just means that you need 2 control lines per drive, one to select the drive and one to control its motor. That's only possible if you limit the number of drives on a 34pin cable to 2 while the shugart spec allows 4. GerritReceived on 2019-01-08 23:00:13
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