jeremy youngs wrote: > hello again, well ive eliminated the lovejoys was able to get good scalind > at .1 and .5 but not both with the same numbers, I gave up on the > microstepping and just fudged the gear ratio. However I just dont seem to > be able to get consistent scaling. Are there drives that just dont work w/ > linuxcnc? should i try another computer? how do i know if its loosing steps > aside from the obvious noise? is it possible to lose steps and not know it? > Yes. Especially if the drive requires a setup time before or after a direction change, you can get one (micro) step in the wrong direction every time the direction signal changes state. There are settings in the HAL file for this.
Generally if you ask for too much speed or acceleration you will get horrible grinding noises and obvious stalls, but improper step/dir timing can cause very subtle errors that accumulate. To eliminate backlash, do all moves in the same direction. To correct scaling errors, make long moves. Jon ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
