Messages

4021

General Mach Discussion / Re: Help with Homeing ?

« on: July 15, 2018, 09:19:44 PM »

Hi,
if you are using a parallel port I don't think you can do it.

There is a difference between 'home offset' which is a Mach feature and enacted by the parallel port
and 'remote homing' which is not a Mach feature. There are some motion controller that can do it, the ESS
and the PoKeys 57CNC and maybe others too.

With a parallel port if you set a HOME OFFSET in the homing/limits page the axis will back off the switch, only
as far as it has to for the switch to change state, and then ZERO the machine coords for that axis if you have
not set a home offset, OR, set the machine coords for that axis to the OFFSET you supplied. IT DOES NOT TRAVEL
THE DISTANCE,  IT JUST SETS THE MACHINE COORD TO THE OFFSET.

If you have a motion controller that allows it you can program a distance and the axis will back off that distance.
As I say I know the ESS and the 57CNC have it...don't know about the others.

You can get a similar thing to happen with a parallel port by specifiying offsets and THEN when hominig is complete
issue an MDI G28.

Craig

4022

Mach4 General Discussion / Re: ESS Inputs and Outputs not doing anything

« on: July 15, 2018, 09:06:45 PM »

Hi,

If it just worked or didn't that would be one thing, but the fact that it works sometimes and not others seems really odd to me.

Yes, I agree. Not sure whats going on, I have never encountered a fault of that description and if there were
a problem as basic as this we would all have heard it!!

The only thing I can suggest that might explain it is that the input signal is flickering or bouncing at the time of signal
transition. May I suggest applying some filtering on the input pins in the ESS/PIN Config page, I would try a value of 500.

Craig

4023

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: July 15, 2018, 06:56:00 PM »

Hi,
if this is an analogue input servo amp then position,velocity or torque mode don't make
sense.

Analogue voltage (or current) input is amplified to an analogue output  that is a voltage and
current, for a shaft output of speed and torque.

The servo is in position when the error between the step/dir command and the encoder feedback is zero,
this calculation/measurement is made by the controller, in this case the CSMIO.

Craig

4024

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: July 15, 2018, 06:41:09 PM »

Hi,
your right Allan, its definitely sounding like the servo amp is either faulty or set up differently.

Craig

4025

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: July 15, 2018, 05:43:41 PM »

Hi,
could your servo amp be current controlled not voltage controlled?

Craig

4026

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: July 15, 2018, 05:30:56 PM »

Hi,

I have already tried a 9v battery and the speed doesn't increase any more than it does for a 1.5v battery. It does sound like a driver issue but they were working fine with the old controller.

That doesn't sound right. If the servo amp and servo can't do the business it won't matter
how you tune the CSMIO.

You absolutely HAVE TO GET THE SERVO TO RUN AT MAXIMUM OUTPUT if you are ever to have the chance of tuning the controller.

Craig

4027

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: July 15, 2018, 02:22:02 PM »

Hi,
you say the CSMIO is producing 10V.....is that the output that goes to the drive?

If that's the case the drive should be producing max voltage/current to the motor. If you hook a 9V battery to the signal input
of the drive the servo should go flat-out or close to it.

Craig

4028

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: July 15, 2018, 11:14:25 AM »

Hi,
best guess is that 2500 PPR is 2500 line encoder and therefore 10,000 counts per revolution.

Craig

4029

General Mach Discussion / Re: Precise calibration but inconsistent incremental movements

« on: July 15, 2018, 02:01:01 AM »

Hi,
one last thought....could it be the rack?

While the errors seem to vary depending where on the rack you are if the error is always 300.2 say then it might be the rack.

Craig

4030

General Mach Discussion / Re: Precise calibration but inconsistent incremental movements

« on: July 14, 2018, 09:45:32 PM »

Hi,
have you got the software on your PC and have you connected the serial cable to the drive to program it?

Do you have the ALM output of the drive hooked up to Mach? Do you have any provision for errors?
Can you confirm the position loop parameters are identical for each drive, the position error particularly.
Can you run the offending axis with the error panel displayed....what happens?

Craig