Re: [CAD_CAM_EDM_DRO] Advise on motor selection for use with G320’s

Hi Steve,

Avoid brushless motors unless they come with the correct driver. Every
manufacturer seems to use a different encoder and timing system. In most
cases they are not interchangeable.

Otherwise avoid servos that are rated for less than 24V or more than
100V. Ideally you want a motor with an attached encoder that is at least
200 CPR. This saves a lot of time and hassle buying and fitting an encoder.

If you want to convert a DC motor avoid silly voltages and look for
motors that are long and skinny rather than short and fat. Ideally you
want motors that are rated for low speed. Plain bearings don't work well
in this application so try to get motors fitted with ball bearings.

Les

Steve wrote:

>I am putting together my first CNC project and I have been scouring
>ebay looking for a couple of DC servo motors to use with my G320's
>from our friends at geckodrive.com.
>
>What type of motors do I NOT want? I see a lot of info on CNC
>conversions with the G320's, good info on sizing of a motor, but
>I am
>looking for the "Top 10 ways to get stuck with a motor you
>can't use
>for your project" list.
>
>I know I can put an encoder on most motors if needed. What about
>brush vs. brushless? Any brands to avoid?
>
>The project is a 4'x8' plasma cutter.
>
>Thanks,
>
>Steve
>
>
>
>
>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@... davemucha@... [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
>
>
>Yahoo! Groups Links
>
>
>
>
>
>
>
>
>