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Author Topic: idiots guide to servo motors and drives please  (Read 4372 times)

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Offline nobby

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Re: idiots guide to servo motors and drives please
« Reply #10 on: June 26, 2014, 05:51:39 PM »
damn that isn't even the correct data sheeeeets link - its this one.
http://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=1&cad=rja&uact=8&ved=0CCIQFjAA&url=http%3A%2F%2Fpewa.panasonic.com%2Fassets%2Facsd%2Fpanasonic%2Fcatalog%2Fa4-catalog.pdf&ei=hpWsU9uxKo2M7Abv34FA&usg=AFQjCNE2Hvn4w6lNjUvo5aSGwyj44tlzJw&bvm=bv.69837884,d.ZGU
i am glad I didn't just bid on eighteen motors with incorrect last 3 didgit specs and about ten drivs that didn't have the 003 on the end.......

Offline nobby

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Re: idiots guide to servo motors and drives please
« Reply #11 on: June 28, 2014, 07:07:16 AM »
please check my homework

so I am after
MADDT1207003

drivers

MSMD022P1S

motors
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which equates to a panasonic 200w minas A4S system

nema 23 sized 60mm motors at 91 volts and 7.5 amps, no brakes 1/2 inch shafts
240v drivers with 5v inputs for
pulse / cw  = step +
step+= pin 3 or 44
step - = pin 4 or 45
ccw = direction
dir + = pin 5 or 46
dir - = pin 6 or 47

don't need a 24v signal with the A4S?

do you need to set up the stops at 24v and thell the driver, or simply leave it 5v and let the bob and mach take care of it.

I can't seem to fathom the difference with an A4A and A4S - as the A4S is NO analouge, but it appears that the A4A can take both analouge and pulse train
so can I widen my searh and simply go for the A4A or is it better to stay with the 003 A4S's
/\ as long as I don't go for a 'P' = positioning only!!! - hmm thats why they are so much cheaper!!!!!

thank you
« Last Edit: June 28, 2014, 07:10:46 AM by nobby »

Offline nobby

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Re: idiots guide to servo motors and drives please
« Reply #12 on: June 28, 2014, 11:57:18 AM »
aahhhh i see now the difference in the encoder
http://www.youtube.com/watch?v=Pi5v1idToeU
commutation
1. hall
2 resolver
3. absolute

groovy, so the hall effect is good enough
resolver is better that hall
absolute trumps both.
so I take it the driver/amplifier is paired to the encoder/commutator i.e. you can't run absolute in a hall drive.
so you do have to be wary mixing and matching motors and drives - hmmmmm

« Last Edit: June 28, 2014, 12:03:04 PM by nobby »