That KBMG can easily handle that 1hp motor, it's designed for up to 2hp. On a brushed DC motor the torque is directly related to current. If you have a problem with low end torque you probably did not setup the IR comp and CL pots correctly. That drive needs to be setup in speed mode as you are controlling the speed with the analog input from the PID. The drive itself will control torque and it needs to be setup correctly.
I suggest you go back to the KBMG and set it up right. These drives have been used in industrial machinery for years, there's no reason it can't handle a 1hp spindle motor. On Friday, February 7, 2020 at 6:44:06 PM UTC-5, Aurelien wrote: > > Hi > > > Sorry to comme back again with this stupid motor. > > After taking some time to test the motor with the kbmg-212D and PID and > test to load motor, it appears the torque at low RPM is really little, it's > really too easily stop the spindle. > > I have also test with original potentiometer without CNC and the issue > seem to be the same. > > Regarding to this test i have find in my archive the original motor board, > this one use a 100 pulse encoder for feedback and the most important the > torque is really really better... > This board is not perfect : > kbmg is more smooth for speed change and allow changing direction > Firstly i think there is no brake i have now see the big resistor used as > original brake (wire uncompleted and was poorly "changed" by precedent > owner) > The control is done with 6.35v and 1K potentiometer > Unfortunatly 2 potentiometer for calibration are missing > This is SCR controler 30 years old > > I have thinked some wire for make reverse possible and keep the resitor > brake usage, in other post i speak about burn too many controler and i'm > now really affraid about doing some other stupid test... > > If you can give me what is your opinion about that and about my schematic > i'm really lost with these spindle... > > for reference motor is 1Hp 180v DC ~5A + 180v Field > > Br > > > [image: Original motor board.png] > > [image: Potential Wiring Original board.PNG] > > > > > > -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/machinekit/780c8621-6158-4451-b1b1-94e9fb1bbb60%40googlegroups.com.
