Machsupport Forum

Third party software and hardware support forums. => CS-Lab => Topic started by: Overloaded on April 03, 2013, 07:05:07 PM

Title: -M Home, Limits and Servo Drive CW/CCW Limits
Post by: Overloaded on April 03, 2013, 07:05:07 PM
I'm in the process of configuring a -M to 2 servo drives.
The manual shows HOME and LIMIT to individual pins for each axis ...
  Is this necessary ? or, can all HOMES and LIMITS be in series to one input ... like in Mach ?
  The attached note is not entirely clear as it might imply that ONE of the axis switches can be HOME and LIMIT, as in the illustration. (also attached)

Also, the drives have inputs for CW/CCW limits that are configurable, NO or NC.
  Should these be included in the limit circuit also ? All in series ?
Or, just ignore the servo Cw/CCW and let Mach3 and the -M handle it ?

Not clear in the manual ..... to me anyway.
Thanks (Hood), :)
Russ
 :)
Title: Re: -M Home, Limits and Servo Drive CW/CCW Limits
Post by: Hood on April 04, 2013, 03:56:35 AM
Dont have the M controller but I think it will almost certainly work in the same manner as the S
What I found was that having all limits and homes using one input does not work, what you can however do is have all limits as one input and have separate homes. You may even be able to have all homes set to the same pin but I have not tested that out.


Hood
Title: Re: -M Home, Limits and Servo Drive CW/CCW Limits
Post by: Hood on April 04, 2013, 04:42:37 AM
I think you could also have all X limits and home as one input, Y as one Z as one and as long as you have the home safety disabled in General Config it should be fine. I am sure I tested it that way but cant be sure. As I have the A and S I have plenty I/O so I set up seperate homes and combined limits but the M has less I/O so maybe this option would be better as it only needs 3 rather than 4 the way I have it.
Hood
Title: Re: -M Home, Limits and Servo Drive CW/CCW Limits
Post by: Overloaded on April 04, 2013, 02:58:05 PM
Thanks Hood.
And about question #2 .... about including the drives CW/CCW limit outputs ?

Russ
Title: Re: -M Home, Limits and Servo Drive CW/CCW Limits
Post by: Hood on April 04, 2013, 03:11:32 PM
Not really sure what you are contemplating there Russ, how would you be inputting the limits to the drive? extra switches? or ?
Hood
Title: Re: -M Home, Limits and Servo Drive CW/CCW Limits
Post by: Overloaded on April 04, 2013, 03:58:40 PM
Just wondering about wiring the existing switches to the drive as well as the -M, being everything is 24v.
Probably not necessary, but seems it would be an extra safety to halt the drive.
 


Title: Re: -M Home, Limits and Servo Drive CW/CCW Limits
Post by: Hood on April 04, 2013, 05:11:32 PM
You could use the limits like that Russ, dont really think there would be any benefit using the outs from the drive though as the limits will also be going to the CSMIO so it will know already when a limit is hit.
Hood
Title: Re: -M Home, Limits and Servo Drive CW/CCW Limits
Post by: Overloaded on April 04, 2013, 05:15:39 PM
OK then, I'll save the wire for something else.

Thanks,
Russ
Title: Re: -M Home, Limits and Servo Drive CW/CCW Limits
Post by: Hood on April 04, 2013, 05:17:31 PM
Send it to Brett, he has just been moaning to me about the price of wire ;D
Hood
Title: Re: -M Home, Limits and Servo Drive CW/CCW Limits
Post by: Chaoticone on April 04, 2013, 05:26:11 PM
Donations gladly accepted!   ;D

Brett
Title: Re: -M Home, Limits and Servo Drive CW/CCW Limits
Post by: Overloaded on April 04, 2013, 05:28:58 PM
I have little to spare. :)
I acquired what I have by ripping the phone cable from my neighbors house. (they talk too much anyway)
Very nice wire ... and the pairs are already twisted.  ;D

My enclosure is made from aluminum sheet that I found along the roadside on posts. >:D  I think most of them are just distractions anyway.
Less distractions make better drivers. ;D

Russ
Title: Re: -M Home, Limits and Servo Drive CW/CCW Limits
Post by: Chaoticone on April 04, 2013, 05:36:15 PM
 ;D  I dont have any neighbors with phones but could I cut the main line just past my house and dig it up?  That sounds like a option I may be able to afford.

My cabinet is the corner of an old dumpster with a tin foil curtain for the back and left side.  I would have cut the opposite corner and joined in the middle with some bailing twine but the night light was on.......  I have hopes it will burn out again soon though.

Brett
Title: Re: -M Home, Limits and Servo Drive CW/CCW Limits
Post by: Overloaded on April 04, 2013, 05:39:10 PM
  :D ;D