Messages

3641

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

« on: September 17, 2018, 04:37:37 PM »

Hi,
take the belt off so the axis doesn't move.

You have yet to devise a means of establishing the the synthesized encoder signals from the
drive are indeed being correctly generated.

If you refuse to put the drive in position mode then I can't help you devise any strategy.

Craig

3642

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

« on: September 17, 2018, 03:10:16 PM »

Hi,

I cant index the machine. The limit switches work fine but when I send the axis home it's ignoring them and the motor doesn't stop.
I also can't control the speed of homing.

These are Mach issues...don't worry about those until you have got the CSMIO and servo/drive loop sorted.

You should be able to issue MDI commands of the type G0 X100, G0 X0 etc. Can and does the CSMIO close the loop accurately and using the software
scope of the CSMIO what does the step error look like?

Craig

3643

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

« on: September 17, 2018, 07:33:50 AM »

Hi,
the drive data suggests 4.5A_rms at continuous rated current, probably per phase.
It also suggests 13.5A _rmsmaximum current.

Try:
DICONT=4.5
DIMAX=13.5
ILIM=4.5
IMAX=4.5

Craig

3644

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

« on: September 17, 2018, 07:15:57 AM »

Hi,

It's now set to 13.5amp motor max current.

I think this is still way WAY too high. If I'm not mistaken that is the per phase current.....13.5A per phase!!!

Do the calculation:
DC Link current= 3 (phases) X 13.5 (A per phase) / (square root 3)
                      =23.4A
Single phase input current= DC Link current / power factor
                                     =23.4 / 0.5
                                     =46.8A
Its no bloody wonder you 'trip the electric'. Reduce the max current down to a couple of amps.....once you get things sorted then increase it to somewhere
close to maximum. Remember you are trying to use an external controller to close the loop, the CSMIO, and it is highly probable during the set up you will
have maximum current events, so why have the max set at a value that threatens to damage the drive, the servo and your power supply. This is supposed
to be a 1hp axis servo......not the motor that powers the earth around the sun!

Next issue is that there are four parameters that set the maximum current, P1-78 through P1-81, ILIM,IMAX,DIPEAK, and DICONT. Not 100% sure what they all mean
yet, but I bloody well know none of them should be 13.5A!!!!

Craig

3645

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

« on: September 17, 2018, 03:09:56 AM »

Hi,
use the tuning software to set up a series of indexed moves. You should also be able to set a number of free running speeds.

Craig

3646

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

« on: September 17, 2018, 02:36:49 AM »

Hi,
you've also got the tuning/setup software. In position mode you can program indexed moves, you don't even need wires
on the pulse inputs.

I don't know what you are doing wrong, surely the programmed current limits would prevent the drive from drawing enough current
to trip your breaker. Either way I would not hook up the CSMIO until I was 100% that the drive and servo were perfect, including sensible
current limits.

Schnieder were good enough to replace one drive....how do you think you would go asking for a second?

Craig

3647

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

« on: September 16, 2018, 06:51:44 PM »

Hi Mick,
by using the CSMIO you have added a layer of complexity that is making your job impossible.
You don't know whether its Mach, the CSMIO or the servo/drive and you are floundering.

Disconnect the CSMIO, put the servo drive in position mode and manually pulse the step input
to confirm the servo and drive operate correctly. If and when you get the servo and drive operating
THEN add the CSMIO, without Mach to start with.

If you don't have a signal generator to pulse the step input get a rotary encoder and use one channel
and spin it for all its worth. You will have to use electronic gearing to get useful results, a good learning
curve in itself.

Craig

3648

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

« on: September 16, 2018, 05:01:50 PM »

Hi,
if you wish the CSMIO to close the loop then the servo drive will have to produce encoder signals
to the CSMIO correctly. That is the first step, you must confirm that the servo drive is producing
the right encoder signals.

If you put the servo drive into position mode, then without pulse input  the servo should stop and
stay that way. It confirms that the position loop is providing a correction such that the velocity is
zero and overcoming the slight bias voltage.

If you had a simple step/direction controller, even a plain parallel port you could control your servo
easily.

Craig

3649

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

« on: September 16, 2018, 03:00:30 PM »

Hi,
the CSMIO is not working as it should.

Do you have the means, either an oscilloscope or software within the CSMIO to monitor the synthesized encoder outputs from the drive?

Another idea just to test would be to disconnect the CSMIO altogether and set the servo drive in position mode. The manufacturers servo loop
is going to be a snap by comparison to closing it with the CSMIO.

Craig

3650

General Mach Discussion / Re: Limiting 5th axis rotation, new setup

« on: September 16, 2018, 02:52:00 PM »

Hi,

I was talking to a friend and he pointed out that there are options to limit rotation for B within the Postprocessor.

Yes that's standard but you will still have to reference the B axis. If the Gode is limited to +90⁰ to -90⁰
that great but Mach needs to know where 0⁰ is or the limits don't make sense. You need a home switch of some
description.

Craig