Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: nobby on June 22, 2014, 09:22:20 PM
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hello servo motors for complete idiots please.
for example
http://www.ebay.co.uk/itm/Used-Mitsubishi-AC-Servo-Motor-HC-MF23-UE-200W-Output-30-DAY-WARRANTY-/141027193327?pt=LH_DefaultDomain_0&hash=item20d5e031ef
I would gather that that is a nema 23 sized motor = physically?
56mm wide foot about the same in length
I don't understand the 120 volt input???
does that mean its 120 volts to the drive, and the feed to the motors steps down to 24 or 36 volts
a mere 1.5 amps?
my basic understanding is you have a hall sensor spinning on the back of the motor that simply talks to the drive doing on the spot
positioning and correcting - does it then do power demands too?
i take it this is not a servo drive?
http://www.ebay.co.uk/itm/DFR1507-5-Phase-Driver-Vexta-Fine-Step-Used-/310932443620?pt=LH_DefaultDomain_0&hash=item48650491e4
even though its 5 phases?
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Hi,
This is an AC servo motor. Unless you have the driver matched for this motor, I'd leave it alone.
The driver you have identified is for a stepper motor and not suitable as a servo driver
Cheers,
Peter
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is there a comprehensive list of servo motors and drives that use step and direction instead of 10v signalling
can you mix and match servo drives and motors
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1) No
2) If you know what your doing, in some cases, yes. If you have to ask, it's probably not a good idea to attempt it.
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yes I think its wise me swerving the whole idea.
mostly coz its too expensive .............
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DC Servos can be paired with almost any DC drive as long as the motors current and, to a lesser extent, voltage are comparable to the drives output.
AC servos are a different matter, some drives can be configured to use motors from other manufacturers and others can only be used with the motors meant for them. Some AC drives require resolver feedback, some incremental encoder feedback, some serial (sine/cosine etc) and some can use more than one.
So as has been said by Gerry, unless you know a bit about them, or want to investigate/learn, then it is best to go for a matching pair of motor/drive.
Most modern AC servos will be capable of Step/Dir , some makes have different models within the range that are analogue command or step/dir but not capable of both, so you have to do a bit of reading before you jump in and buy them. Having said that there are controllers available for Mach that can utilise analogue command servo drives and they actually have some benefits over Step/Dir controllers. I use the CSMIO/IP-A but there is also the DSPMC, Galil, Kflop with Kanalog.
Hood
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so stay with dc 48-60v
buy 3
amc BE12A6E X04
copley 503
leadshines
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Why not buy matching sets, like the Leadshine ACM motors with ACS drives? They're very reasonably priced.
http://www.leadshine.com/series.aspx?type=products&category=servo-products&producttype=brushless-servo-motors&series=ACM
http://www.leadshine.com/series.aspx?type=products&category=servo-products&producttype=brushless-servo-drives&series=ACS
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I think I am getting there.
what I want is a nema 23 foot 200watt motor 230v mains in the UK at 10 amps - so I don't keep popping the breakers in the hosehold supply so its ac as the drives simply plug into the mains
so I want three of these
http://www.ebay.co.uk/itm/USED-PANASONIC-For-MSMD022PJT-AC-SERVO-MOTOR-FREE-SHIPPING-/151248627992?pt=UK_CE_GPS_Accessories_Software_ET&hash=item23371ee918
and three of these
http://www.ebay.co.uk/itm/PANASONIC-AC-Servo-Driver-MADDT1207003-200W-Servo-Drive-/360952439930?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item540a71247a
A4S PULSE TRAIN step direction input.
keep it all panasonic A$ as the drives take step and direction and are the current model
boom, better start saving
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%2Fwww.techdrives.co.uk%2FMultimedia%2FPanasonic%2520Servo%2520Systems%2FPanasonic%2520A4%2520Servo%2520catalogue.pdf&ei=qHisU76kOcuw7AaW04C4DQ&usg=AFQjCNEAfq1Gr-9jLxu9EqkutAXWvBsxvQ&bvm=bv.69837884,d.ZGU
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The Leadshine's I linked above should work fine. You just need a 60V DC supply running off your 230V AC.
You can get them on Ebay for about $500 US per set. Probably less than 1/2 the panasonic.
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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.......
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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
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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