Messages

31

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

« on: September 17, 2018, 03:05:51 AM »

Hi Craig
Not really sure what you saying.
I can't contact Schneider and say I want another drive when there's nothing wrong with the ones I have.
As far as programmed current limits. This is set in P1-78.
It's factory set at 19amp. Which is possibly why the first drive gave up. I wasn't aware I need to change that parameter. It's now set to 13.5amp motor max current.
I am able to use the software and jog with no issues and autotune.

Mick

32

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

« on: September 17, 2018, 02:06:07 AM »

Hi Craig
Yes this is confusing me somewhat.
I'll try what Hood suggested then look at your suggestion.
Reason being is I will have add addition wires to the Cn1 connector to try this.
I do have the old MPG wheel which I think I could use as a pulse generator.

Mick

33

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

« on: September 16, 2018, 06:03:19 PM »

Hood

Thanks. Will try tomorrow.

Mick

34

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

« on: September 16, 2018, 03:15:42 PM »

Hi
I haven't got an oscilloscope but there is one within the CSMIO. I wouldn't have a clue what I am looking for.

What would you suggest doing once I put the drive into Position mode?

Mick

35

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

« on: September 16, 2018, 02:53:25 PM »

Hi

Good news so far nothing blown up. lol

As mentioned before without any power connected to the Vref I get very slow movement of about 3 rpm. Not a major issue.
Connected up to the CSMIO on Dac output 0. Pins 1 and 14 on the Analog I/O connector. When I enable the drive the motor turns at around 60 rpm. I have around 200mv on pins 1 and 14 without any speed command.

I have autotuned the drive without the CSMIO connected which worked fine.

Craig
I take on board what you said about the CSMIO closing the loop and rectifying this issue but this is not happening. I am unable to autotune through the CSMIO. It is making it impossible to try different setting within the drive when it moving the motor at approx 300mm/minute as soon as enabled.

I am also not able to index the motor. If I do a reference home from Mach the motor moves in the right direction but ignores the home switch.  

Any Ideas

Cheers

    

36

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

« on: September 14, 2018, 01:44:56 PM »

Thanks Craig

The motor is turning at about 3 rpm without any voltage connected. With the DC motors this was adjusted by the potentiometer on the drive. I will read through the manual tuning section to see if anymore info is given. Doesn't say anything regarding this using the autotune method. I understand what you saying regarding closing the loop but seems a lot for the CSMIO to keep correcting.
Please forgive me if that was a stupid comment.
Cheers
Mick

37

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

« on: September 14, 2018, 01:02:27 AM »

Hi Craig
Lol. It's a nice idea but not at the moment. I'll give you a shout if I change my mind.

Any idea why I'm getting slight movement when the drives are enabled? Auto tuned the drives but not tuned the CSMIO yet.

Cheers
Mick

38

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

« on: September 11, 2018, 01:46:41 PM »

Hi

Craig
Making my own drive is way above my level and a route I am not prepared to take.

Hood
Thanks for your comments. There is a reference to Master/slave in the manual but very limited info.

I think this is a none starter going by both of your comments or at best something which will cause more issues than its worth.

I'll reluctantly stick with the phase converter and order a 3 phase motor.

Thanks again.

Mick

39

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

« on: September 10, 2018, 05:16:06 PM »

Hi Craig

Makes sense.

Cheers
Mick

40

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

« on: September 10, 2018, 02:20:20 PM »

Hi Craig

First: two 1.5kW servo drives which have the same power factor as one 3kW drive will draw the same current.

I'm not concerned about the power factor.

Second: if the motors were running in torque or velocity mode then its probable you could get them to share the load.
If running a closed position loop then they won't share the load, one servo will always be a few arc minutes ahead (or behind)
its partner and will therefore have to provide the lions share of the effort.

Can you expand on this?

Third: is the price of two 1.5kW servos and drives cheaper than one 3kW servo and drive?. I think the price would favour one large
servo/drive. DO NOT LET THE MISSUS READ THIS OR YOU ARE SUNK!!!



The price is very similar.

The thing that is bugging me is the phase converter. The company I bought it from are no longer selling these units. They still offer a repair service at the moment but not sure how long for. What I can sell the phase converter for would go a long way to paying for the spindle set up. Old ground but if I wanted to sell the lathe it would be more saleable as a single phase machine. No, I'm not thinking of selling it.

Just exploring and want to make sure I cant use single phase set up before ordering the 3 phase motor and drive.

Mick