Help connecting servos to breakout board Mach3

[m_c]

I'm going to ask a simple question, you have compared the full model number on the drive to the manual?
It's not got any additional codes that could signify it's a slightly different model?

I've just searched for Omron R88D-U Analog, and it's thrown up a link to an analogue input version of the drive...

[Agathon]

I'm going to ask a simple question, you have compared the full model number on the drive to the manual?
It's not got any additional codes that could signify it's a slightly different model?

I've just searched for Omron R88D-U Analog, and it's thrown up a link to an analogue input version of the drive...

Ouch - I think this has just turned into an expensive experiment. The model number is R88D-UA08V. The A is for analogue. Bollox.

[m_c]

At least you know what the problem is now!

[Agathon]

At least you know what the problem is now!

Well, it's not all negative. It's a steep learning curve, but I'm pretty sure the 200W servos will drive the Fehlmann table without too much trouble. There seem to be plenty of Omron/Yaskawa drivers about and I'll think hard about a use for the three analogue drivers I have - they'd make an excellent power feed for a small mill.

It is a lesson in there not being any free lunches and if something is a bargain price then there's a reason. I shall embark on the next purchase with the question of analogue and digital firmly planted in my consciousness!

[Agathon]

I know I'm going to regret asking this as I'm sure it will be more complex and expensive than just shoving these drives back on fleabay, but...

A brief and desperate search leads me to believe that it is possible to control analogue servo drives for position by converting step and direction to analogue signals. Anyone have any knowledge/experience?

This chap appears to be doing the very thing:

[m_c]

I know I'm going to regret asking this as I'm sure it will be more complex and expensive than just shoving these drives back on fleabay, but...

A brief and desperate search leads me to believe that it is possible to control analogue servo drives for position by converting step and direction to analogue signals. Anyone have any knowledge/experience?

This chap appears to be doing the very thing:

if you have a suitable spare galil lying around, then its a very valid option, but galil boards are not that cheap.
I've seen step/dir to +/-10v interfaces mentioned, but can't remember ever seeing one that's commercially available.

If you did want to run analogue servos, a CS-Lab Csmio/ip-a, Dynomotion Kflop+Kanalog, or whatever the Mesa analogue output board is, would be far better options.

[Agathon]

if you have a suitable spare galil lying around, then its a very valid option, but galil boards are not that cheap.
I've seen step/dir to +/-10v interfaces mentioned, but can't remember ever seeing one that's commercially available.

If you did want to run analogue servos, a CS-Lab Csmio/ip-a, Dynomotion Kflop+Kanalog, or whatever the Mesa analogue output board is, would be far better options.

Looks like this will do it, but I'd have to build the rest of the circuit (probably too much for me) - http://www.uhu-servo.de/servo_en/index.htm

This looks like a ready made solution but with shipping etc it's probably cheaper to ditch the drives and start again - http://www.rutex.com/us/index.php?productID=126