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Author Topic: Allen Bradley Ultra5000 Sin/Cos Encoder? Resolver?  (Read 22943 times)

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Re: Allen Bradley Ultra5000 Sin/Cos Encoder? Resolver?
« Reply #30 on: May 04, 2010, 01:05:56 PM »
If you mean the hall equivalent tracks, then for an 8 pole motor there is 4 electrical cycles for every mechanical cycle, for a 6 pole it would be 3 for every mechanical.
IOW, The 8 pole repeats 4 times/rev.
Nosmo.

Offline Dan13

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Re: Allen Bradley Ultra5000 Sin/Cos Encoder? Resolver?
« Reply #31 on: May 04, 2010, 01:08:59 PM »
OK, I think I understand it now :)

Thanks,
Daniel

Offline Hood

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Re: Allen Bradley Ultra5000 Sin/Cos Encoder? Resolver?
« Reply #32 on: May 04, 2010, 02:37:40 PM »
Lots of reading to do there Daniel ;D

Nosmoking
 Thanks for the info, the animation I have seen before but the one I was thinking of was different so will have a search as it made it even clearer for people like me ;D

Hood

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Re: Allen Bradley Ultra5000 Sin/Cos Encoder? Resolver?
« Reply #33 on: May 05, 2010, 01:58:08 AM »
Yes, Hood, a lot of info there, but it worth the time to read :)

Daniel

Offline Hood

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Re: Allen Bradley Ultra5000 Sin/Cos Encoder? Resolver?
« Reply #34 on: May 05, 2010, 02:28:33 AM »
Daniel
 Yes found a lot of other good info last night myself,especially one that tells you the way you drive the brushless servo determines whether its AC or DC. Basically DC drives two coils at one point in time where AC drives all three. Said the increase in torque from the same motor was 28% more by driving with AC.
 Also did a bit of searching for encoders and came across this
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=230450656966&ssPageName=STRK:MEWAX:IT
Not able to find the exact specs for it and not really sure what the guy means by single channel, I am presuming he means single ended as I dont think you can get such a thing as a single channel encoder. As said couldnt find that exact model but the series seems to be capable of 12,000rpm continuous speed. Might be worth an email to see if he has any more info.
Hood

Offline Dan13

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Re: Allen Bradley Ultra5000 Sin/Cos Encoder? Resolver?
« Reply #35 on: May 05, 2010, 02:53:28 AM »
Hood,

Thanks for link. Only information I've been able to find on it is this

http://sensor.baumerelectric.com/productnavigator/downloads/Produkte/PDF/Datenblatt/Winkel_und_Positionsmesssysteme/en_E_1DG_BDK.pdf

You've probably seen it already. Looks like the same encoder just a newer version. So looks like it does rated at 12,000rpm, but it is only 100PPR :( so I am not sure how will the motor perform at low speeds. Also it is 10-30VDC so would require some interface.

Daniel

Offline Hood

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Re: Allen Bradley Ultra5000 Sin/Cos Encoder? Resolver?
« Reply #36 on: May 05, 2010, 03:31:40 AM »
The guy says its 5v but as you say the numbers seem to suggest 24v, would presume the docs are correct.
100 ppr isnt going to be great, thats for sure, especially  if you are intending to turn  at low speeds but at least you know that Baumer seem to rate their encoders for high speeds so might be worth doing a search on US eBay.
Hood