> > What kind of driver are you using? I've got HP_UHU on brushed DC servo's > and a STMBL drive on the AC Servo Harmonic Drive. In both cases those > fault out if the following error doesn't match. In other words, the drive > counts the steps input and if the encoder pulses don't match the steps past > a threshold the motor faults out. >
I'm using ASDA B2 drives from Delta. Looking at the manual it seems they have a similar alarm like the ones you mentioned besides the overload alarm. The step + dir method is working excellent, I think I miss closing the loop in the control because it's the way I was used to. Anyway, I have one advantage having the feedback directly from the screw and that's in the extreme case of belt failure in the X axis. As soon as the joint starts to fall because of gravity the following error would be detected and turn off the machine, inhibiting the solenoid of the brake in the X axis and saving the joint from crashing with the part or the tailstock. But, apart from that, I'm doing fine with open loop. El sáb., 25 abr. 2020 a las 23:56, John Dammeyer (<[email protected]>) escribió: > > > Don't forget I'm running servos not steppers. But yes, I'm running them > in > > step+dir mode. This is the first time I'm using a servo with this control > > method so I really don't know what could happen if a commanded movement > > cannot be achieved. I suppose the servo will trigger an overload alarm or > > something like that. I plan to swtich to analog mode sometime in the near > > future because it's a better control method in my opinion. But for now we > > had to go with the open loop config because we were really short of time. > > > What kind of driver are you using? I've got HP_UHU on brushed DC servo's > and a STMBL drive on the AC Servo Harmonic Drive. In both cases those > fault out if the following error doesn't match. In other words, the drive > counts the steps input and if the encoder pulses don't match the steps past > a threshold the motor faults out. > > I've not ever faulted the AC Servo Bergerda drive but I'm pretty sure it > also faults with a following error. > > So step/dir works fine for me. There's no need to get the PC to do that > for you. > > John Dammeyer > > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
