with Halscope i wasnt able to get any information but halmeter i was, when spindle stop it said "0", when i pressed the "+" on the right side of stop button i get "1", when i press it again i get "101" and so on in 100 increment steps. i may ask the manufacturer about this problem
Am Donnerstag, 22. September 2016 19:42:46 UTC+2 schrieb Sag ich Dir nich: > > the funny thing i just discovered is, the motor turns even if the machine > is powered down, only when i pull the plug of the power supply, the motor > shuts off > > Am Donnerstag, 22. September 2016 19:37:19 UTC+2 schrieb Charles > Steinkuehler: >> >> On 9/22/2016 12:21 PM, Sag ich Dir nich wrote: >> > 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? >> >> The PRU generated PWM output is fairly low frequency. You may need to >> increase the PWM frequency (which will decrease the available >> resolution) or use one of the hardware PWM outputs. I don't think >> there is a HAL driver to talk directly to the BBB's hardware PWM >> channels, but for spindle speed a user-mode python script should work >> fine. >> >> There is nothing on the BBB that generates a 5V output (3.3V only), >> and no 5V buffered outputs on the CRAMPS boards (just the FET outputs). >> >> If there is an analog input to your motor control, you could craft a >> low-pass filter and the low-speed PWM wouldn't matter that much. >> >> > what do you mean by "pull-up"? >> >> A pull-up resistor to 5V. A resistor between the FET output and the >> power rail to pull the output high when the FET turns off. >> >> -- >> Charles Steinkuehler >> cha...@steinkuehler.net >> > -- 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.
