Re: [CAD_CAM_EDM_DRO] Re: BP retrofit yaxis drive burnup- follow-up

Keith Clark wrote:

>Ron, we need to compare notes to see if there is a common pattern.
>Mine takes some time to burn also, but I hope my problem was having
>the relay to turn off and on the power supply on the DC side instead
>of the AC side.
>

Mine was wired just like the schematics show with a very normal low tech
power supply and all wiring in flexible conduit .
I'm hoping that my motor was the problem .
Mauriss is coming out this month with "unkillable" drives that he calls
Vampires (note the connection ) and I will get one of them for this
motor as soon as his production drives come in..
This will solve this problem of the big 42 size motors killing the drives

> Now I can't get the x axis to move properly... I
>am going to drop to half winding
>

I'm also running the windings in series ,wonder if that is a
contributing factor ??

> mode and lower current to see if
>that helps in the long run.
>
>Keith
>
>--- In CAD_CAM_EDM_DRO@yahoogroups.com, Ron Kline <godsone@e...>
>wrote:
>
>
>>Hi
>>Be sure to let us know how it holds up later , I chickened out and
>>replaced my motor and the burnt out Gecko hoping that it was the
>>
>>
>motor
>
>
>>that has been burning out my 201s . The scary part is there is no
>>
>>
>way to
>
>
>>know and the drives get expensive .
>>I have been running it for 2 days with no problem but in the past
>>
>>
>it has
>
>
>>taken several months for it to blow .
>>
>>Keith Clark wrote:
>>
>>
>>
>>>I'd like to give some follow-up on the complete reworking of my
>>>
>>>
>BP
>
>
>>>retrofit. I was burning up Geckos on the y axis. The installer
>>>originally put in everything on top of all the original BP CNC
>>>equipment. I gutted the cabinets and rewired everything. Just
>>>
>>>
>tried
>
>
>>>out the machine and everything works almost. The relay for the DC
>>>powersupply that had been on the DC side got switched to the AC
>>>side. With switching on the DC side there was always a "bump" of
>>>the motors and the backup powersupply for the computer sensed a
>>>spike and briefly shutdown. Now with the AC side switched there
>>>
>>>
>is
>
>
>>>no bump. Hopefully the electrical problems are behind me except
>>>
>>>
>for
>
>
>>>the fact that the x axis will not run smoothly. It stalls unless
>>>tuned for very slow speed. The y and z axes run at top speed and
>>>acceleration in Mach2, much better than before. It looks like
>>>
>>>
>the
>
>
>>>wires are all connected properly but I will recheck everything
>>>tomorrow. In the old configuration the x axis always ran fine.
>>>
>>>If the wiring is fine and the capacitor across the power on the
>>>Geckos is not bad, what next?
>>>
>>>Thanks for any suggestions.
>>>
>>>Keith Clark
>>>
>>>
>>>
>>>
>>>
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>>--
>>Ron Kline
>>
>>American Precision Ceramics
>>
>>
>
>
>
>
>
>Addresses:
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>FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
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>OFF Topic POSTS: General Machining
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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. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
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--
Ron Kline

American Precision Ceramics



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