so now i added a scale (which is maximum rpm) and i can command various speeds but still the motor vibrates. somehow it sounds like it ramps up and down a bit when commanding for example 2000rpm. Noise could probably be, i may change the output to another port (had some coordinate moves with various spindle speeds and when one axis changed direction, the motor stopped for a few milliseconds), is there any pin i can use for pwm that has 5v output on its own?
what do you mean by "pull-up"? Am Donnerstag, 22. September 2016 18:05:46 UTC+2 schrieb Charles Steinkuehler: > > On 9/22/2016 10:02 AM, Sag ich Dir nich wrote: > > > > setp hpg.pwmgen.00.out.00.pin 915 > > setp hpg.pwmgen.00.out.00.enable 1 > > setp hpg.pwmgen.00.out.00.value 0.0 > > net spindle-speed-cmd motion.spindle-speed-out-abs => > hpg.pwmgen.00.out.00.value > > net spindle-on motion.spindle-on => hpg.pwmgen.00.out.00.enable > > > > but somehow the motor, as i turn the machine on, starts to rotate like > it > > vibrates (turns on and off like 20-30hz) > > What are the values on spindle-speed-cmd and spindle-on when this > happens? You can monitor them with halcmd, halmeter, or halscope. > > > and when i press the spindle cw button at 100%, the motor turns smooth > but if i > > use spindle override it vibrates, but also spins, more, the more i go to > 0% > > (even at 0% the motor vibrates at a low frequency) > > > > m3 and m5 commands as well as spindle speed commands are ignored = no > change > > Note that by default, the pwmgen has a scale of 1.0 (0.0=off, 1.0=on), > so you might want to change this to match up better with your motor > driver (perhaps 0-100 for percent, or scale for apx. RPM). > > I doubt that's causing your problem, but it can be confusing > sometimes. I think your issue is either with the commanded values, or > the floating motor drive input (below). > > > i have connected 5v to the extruder power input (P402) but no GND > connected on > > the terminal because i am using the extruder 0 output for PWM (i know it > is for > > 12-24v but the motor controller works with 5v) > > The FET outputs will happily switch any voltage lower than 12V (for > the low-power outputs) or 24V (for the high-power outputs). You can > switch 5V (or even 3.3V) just fine. > > Note when the output is switched off, it is essentially floating (the > FET is turned off, and there is no low-impedance path to the supply > rail) so you'll probably want some sort of pull-up on the output > (unless there is already one in the motor control). If there's noise > around your spindle motor (likely) this could be why you're having > problems at low speed when the FET is mostly off. > > -- > Charles Steinkuehler > cha...@steinkuehler.net <javascript:> > -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to machinekit+unsubscr...@googlegroups.com. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
