Sorry for not posting for so long but i had to make a break, as far as i still know in halscope the raw counter works correctly but the encoder signal is captured very irregular, i might look directly at the contacts with a oscilloscope. I did even put pull-up resistors in the wires, like the manual recommends
i am going to test this: "What do you get running halscope on the index-enable signal (while also monitoring position and rawcounts)?" thanks for your answer Am Dienstag, 15. November 2016 00:00:48 UTC+1 schrieb Charles Steinkuehler: > > That behavior seems very strange. I suspect there may be more than > one problem. I think there could be an issue with signs causing your > forward/reverse problems...you may need an absolute value component > somewhere. The PWM output includes an implicit absolute value (ie: > the values +0.5 and -0.5 produce the same output) which might explain > why it seems to work better. Halscope can help sort out these sorts > of issues. > > It also sounds like you may have a separate problem with the encoder > index. Not a lot of folks have used indexed encoders with the > BeagleBone, so it could be a software issue or a problem with signal > integrity. Are you sure your encoder signals are clean at the > BeagleBone? What do you get running halscope on the index-enable > signal (while also monitoring position and rawcounts)? > > On 11/6/2016 9:33 AM, Sag ich Dir nich wrote: > > Hi, > > > > i am using a Cramps board and want to control a spindle with an encoder > to spin > > in both directions with working PID but the problem is: > > > > *_1_*. The PID only works correctly in cw direction, if i reverse the > direction > > the spindle reverses but the PID does not try to hold the velocity. It > only does > > that when i set the PID minimum output to -8500 (if i set it to the > maximum rpm > > 8750 the spindle does full speed in either direction even when i command > 100rpm). > > the problem with that is when i turn the spindle on and manually turning > it > > faster than the commanded speed, it speeds up to maximum speed. (seems > like the > > PID tries to slow down but does not reverse the direction so it is in a > loop > > trying to slow down by decreasing the speed but actually increasing it > (i dont > > know how to explain it better)) > > > > working spindle reverse is important to me because i want to do rigid > tapping. > > > > is it possible to have a encoded spindle with spindle soft start? > > > > *_2_*. sometimes the Spindle stutters every second one or sometimes two > times in > > a row when turning cw with the working PID. When in reverse without > working PID > > (only PWM) it does not happen. > > > > *_3_*. the index pulse is often undetected (i am using a 512ppr encoder > with A,B > > and index pulse, i also soldered pull-up-resistors to improve rise times > like > > the instruction said) > > > > so currently i am using the eQEP 0, which shares two signals on the A > and B > > pins, maybe the stutter is gone when i use eQEP 1 or 2 because they have > only > > one signal attached? > > The Pins for eQEP 1 and 2 are not setup in the setup.sh file, can i just > add them? > > > > i uploaded my whole machine config > > > > i hope someone can help me > > > > -- > > 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 [email protected] <javascript:> > > <mailto:[email protected] <javascript:>>. > > Visit this group at https://groups.google.com/group/machinekit. > > For more options, visit https://groups.google.com/d/optout. > > > > > -- > Charles Steinkuehler > [email protected] <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 [email protected]. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
