Is positioning mode or torque mode better?

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tblough
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Is positioning mode or torque mode better?

Post by tblough »

I have two ABB Microflex drives and motors that I will be connecting to an Oak controller on a small Hardinge lathe. The Microflex can run in positioning (step/dir) , torque/current (0-10V), or velocity (0-10V) modes. Which mode will give me the better results? Will it make a difference if in the future I add glass scale feedback to the X-axis?
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
cnckeith
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Re: Is positioning mode or torque mode better?

Post by cnckeith »

the oak board doesn't output step and direction..so that's out.
i'd go for the velocity mode.
what is your goal with the hardinge? super accurate production machine? or occasional use in the garage?
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cncsnw
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Re: Is positioning mode or torque mode better?

Post by cncsnw »

... but if you do want to run positioning mode, the Oak will output a pulse train signal (A and B channels). Many drives will accept that as an alternative to step and direction.
tblough
Posts: 3072
Joined: Tue Mar 22, 2016 10:03 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
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CNC Control System Serial Number: 100505
100327
102696
103432
7804732B977B-0624192192
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Boston, MA
Contact:

Re: Is positioning mode or torque mode better?

Post by tblough »

CNCSNW,

I don't know why I didn't notice that. I had originally intended to hook it up in velocity mode and noticed the microflex drive had multiple modes and I remember seeing the Oak board had multiple modes, just didn't bother to check if the multiple modes matched. Sorry for wasting your time.

In answer to your question, this will be for a super accurate prototyping machine/short-run production.
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
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