Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: hughes674 on December 24, 2016, 02:58:35 AM

Title: Dc servo motors
Post by: hughes674 on December 24, 2016, 02:58:35 AM

Would like to do a Mach3 conversion on my Denford Senior Lathe. I have the original Sem MT30 servo motors and Norwin 2110 servo drives. Is it possible to use these motors and drives with Mach3.
If so what would be the best motion control board and breakout board to use.   
I have attached a couple of screenshots if this helps.

Appreciate any help.

Title: Re: Dc servo motors
Post by: TOTALLYRC on December 24, 2016, 08:20:43 AM

They look like analog input drives according to the supplied digram.


Go to this page and take a look at all of the options that have analog outputs.

http://www.machsupport.com/software/plugins/ (http://www.machsupport.com/software/plugins/)

DSPMC/ip is the one I use.

Title: Re: Dc servo motors
Post by: hughes674 on December 24, 2016, 10:10:35 AM

Thanks for the reply.

There are a few with analog outputs. They all seem to be +/- 10v. I think the Norwin drive needs +/-15v.
Would this be right?

Cheers

Title: Re: Dc servo motors
Post by: TOTALLYRC on December 24, 2016, 12:19:04 PM

Possibly but I have never seen that.

Mike

Title: Re: Dc servo motors
Post by: hughes674 on December 24, 2016, 12:57:48 PM

Ok thank you.

Will call Norwin to confirm. What do you think of the CSMIO-IP-A.  Unfortunately the DSPMC/ip is out of my price range. What would be a good breakout board to use?

Cheers

Title: Re: Dc servo motors
Post by: ger21 on December 24, 2016, 02:05:21 PM

CS Labs products are very highly regarded for use with Mach3.

Title: Re: Dc servo motors
Post by: TOTALLYRC on December 24, 2016, 05:50:01 PM

I have not used them but they have a great reputation. Hood really likes then as well.

Mike

Title: Re: Dc servo motors
Post by: joeaverage on December 25, 2016, 02:31:52 AM

Hi,
even if they are +-15V inputs, and I would think it unusual, you can still use the CSlabs board, you just have to scale
your feedback loop so that -10V represents one end of the axis and 10V represents the other. Even if the drive will
accept a voltage outside of that range doesn't really matter. Your noise immunity would be marginally reduced which is
equivalent to 'min step resolution' in a digital system.

If you were being really particular (anal retentive!) then you can put an amplifier between your CS board and the input to
your drive. Good quality opamps with +-15V swing, low noise and adjustable input offset are dime a dozen.

Replacing those drives/motors would cost many many thousands of dimes! If they're in good working order you want
to reuse them.

Craig

Title: Re: Dc servo motors
Post by: hughes674 on December 26, 2016, 06:20:44 AM

Hi

That's great thank you all. Well appreciated. Great point on the op-amps.

Cheers