Re: [CAD_CAM_EDM_DRO] cnc mill project

To add another perspective depending on what you intend to do with your
study of adaptive controls a true servo system may be more useful and
flexible. By true servo I mean a system that closes the loop through
the processor running the control code. This would allow information
that can not be had with step and direction controls to be feed directly
into your algorithms.

Obviously there are a number of things that you could be interested in
under the guise of adaptive controls that could very well be attacked
with step / direction electronics. The use of a Taig though indicates
that you probally could implement a number of differrent systems
relatively cheaply.

Thanks
Dave



John D. Bussema wrote:

>Interesting thought. I have only considered servos from the very begging of
>the project. For one, I think I was just under the impression that servos
>were better in general terms. I also might be biased by Taig's
>premanufactured CNC mill, which uses an open-loop stepper system and
>performs very poorly (so I hear).
>----- Original Message -----
>From: "Nick Ibbitson" <pulseweld@...>
>To: <CAD_CAM_EDM_DRO@yahoogroups.com>
>Sent: Thursday, May 13, 2004 11:16 AM
>Subject: Re: [CAD_CAM_EDM_DRO] cnc mill project
>
>
>
>
>>Just a thought but I would have thought steppers would be cheaper to use
>>
>>
>on
>
>
>>something as small as a Taig Micromill, they are certainly powerful enough
>>and cnc control software and suitable interfaces are readily available on
>>both sides of "The Pond".
>>
>>Nick
>>
>>----- Original Message -----
>>From: "John D. Bussema" <bussema@...>
>>To: <CAD_CAM_EDM_DRO@yahoogroups.com>
>>Sent: Wednesday, May 12, 2004 11:33 PM
>>Subject: [CAD_CAM_EDM_DRO] cnc mill project
>>
>>
>>
>>
>>>First, thanks for the info regarding Gecko drives, I found it very
>>>
>>>
>useful.
>
>
>>My friend and I are industrial engineers at U of I and are converting a
>>manual Taig micromill to CNC as part of an independent study in adaptive
>>control systems. We currently in the very beginning stages of the project
>>and are trying to figure out what components to purchase for the initial
>>conversion. I have a pretty broad background in machine tool systems, in
>>addition to being a metalsmith, but I don't know all that much about CNC
>>interfacing. We'd like the machine to be both accurate and cheap. We've
>>decided to use the Gecko drivers for the project, as I've seen them on
>>numerous websites and all have spoken very highly about them. I was
>>wondering if anyone has suggestions for the type of servos we should use,
>>particularly: typical ranges for continuous torque, speed, voltage, and
>>encoder resolution (we plan on using rotary encoders). We're also
>>
>>
>interested
>
>
>>on upper bounds of the same parameters (i.e
>>
>>
>>> . the maximum values that are worth paying for). If anyone knows of a
>>>
>>>
>>cheap surplus servo supplier we'd be interested in that too Thanks a lot.
>>
>>
>>>-John
>>>
>>>
>>>[Non-text portions of this message have been removed]
>>>
>>>
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>>Addresses:
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>[Moderators]
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>>URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
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>>OFF Topic POSTS: General Machining
>>If you wish to post on unlimited OT subjects goto:
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>aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
>you have trouble.
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>
>>http://www.metalworking.com/news_servers.html
>>
>>http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
>>
>>
>sister site to the CCED group, as many of the same members are there, for OT
>subjects, that are not allowed on the CCED list.
>
>
>>NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
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>DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
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>>bill
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>OFF Topic POSTS: General Machining
>If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
>http://www.metalworking.com/news_servers.html
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>http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.
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>NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
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