Re: [CAD_CAM_EDM_DRO] Digest Number 3521

Can you give me access to this?

Carl Mikkelsen wrote:

>There is another place, other than EMC, where you can get Stewart Platform
>kinematics code to play with.
>
>I have Stewart Platform kinematics available to those who work under Linux
>and can build code. Connections to other stepper drivers would be required
>for specific systems.
>
>Platform geometry is largely but not completely handled through a
>configuration file. In particular, joint locations are in the
>"joints.txt" configuration file, tool shapes (square endmill, ball endmill,
>V-shaped) are in "/usr/etc/tool_table.txt", but screw-pitch is written into
>the code.
>
>This does not include a G-code reader. I'd like one, maybe even to write
>one, but the G-code spec didn't seem to be much help, as there seemed to be
>more variations than there were specifics. If someone has an example of
>5-axis G-code, I could start from that as the spec.
>
>This does include the kinematics handler for my pose language. It also
>includes raster-to-toolpath conversion and some higher-level tool path
>generation tools.
>
>I never haven't found, with my Stewart Platform, that I need to take into
>consideration acceleration dynamics, so the kinematics is first order. The
>velocity can be (roughly) controlled. The kinematics processor does not
>worry about the momentum of the platform. The hardware I have in the first
>machine doesn't move all that fast (about 3/4 IPS), and the head isn't very
>massive. The next machine (finally being assembled in my NEW workshop!)
>will be faster and more massive, so I may need to extend the kinematics to
>allow for controlled acceleration and jerk.
>
>I can make CVS access to my repository available through SSH to developers.
>
>This is my personal code, and anyone working with it will, no doubt, make
>improvements. I'd hope that the improvements would be shared back with me,
>[ and that it not go commercial without my involvement. :) ] .
>
>-- Carl
>
>At 07:56 AM 12/11/2003 -0600, you wrote:
>
>
>>On Thursday 11 December 2003 5:56 am, CAD_CAM_EDM_DRO@yahoogroups.com
>>wrote:
>>
>>
>>>Message: 3
>>> Date: Wed, 10 Dec 2003 15:07:59 -0500
>>> From: "Simon M. Arthur" <chroma@...>
>>>Subject: Re: Hexapod question
>>>
>>>I was messing around with EMC the other night and found that it only
>>>let me tilt the platform in one direction, and wouldn't tilt it back.
>>>Now it's giving me an error, saying that I must be in "teleop mode" to
>>>move the platform, whatever that is.
>>>
>>>EMC seems to be functional, but it sure is a pain to use.
>>>
>>>
>>Where elese are you going to find robot or Stewart platform kinematics for
>>play?
>>
>>Ray
>>
>>
>>
>>Addresses:
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>>FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
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>
>
>Addresses:
>FAQ: http://www.ktmarketing.com/faq.html
>FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
>Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
>Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
>List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@..., timg@...
>Moderator: pentam@... indigo_red@... [Moderators]
>URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
>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
>
>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. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
>bill
>List Mom
>List Owner
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>
>

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