resolver problem

[moose man]

hi all had problem with a resolver been giving me s..t all week went back to repairers again and said it was the rotary problem the ac servo motor would not go above 450rpm design rpm 3000 on a 6 pole ac servo drive control tecnics ds 1 could this cause the problem if as the fault on the resolver rotary have ask for a condition fault report for the first fault i had but no reply

thanks moose man

 

[Sidewinder]

Have you got a base frequency on the resolver mate?

 

[moose man]

50hz on the primary side of the drive unit all so did a auto tune but still did not like it but will have motor back at my house in about 15 min the director as collected it from essex then i can fit it back on in the morning at stupid a clock

 

[Sidewinder]

No mate, the resolver has to have a base frequency for the secondary side of the resolver to feed the resolved position back to the drive.

This is the difference between a resolver, encoder, tacho etc.

Did you do the auto tune with the mechanics removed or connected, and what is the drive requirements, are you auto-tuning to the motor characteristics or the, mechanical characteristics?

If you are stuck ring Andy, his guys will help out, if they are stuck then they/you can ring me!

 

[moose man]

hi sidewinder did the auto tune with the mechanics connected drive req are as name plate

stall 24nM @14A

SPEED 3000RPM

KE 98V/KRPM

KT 1.6m/A

BRAKE N/A

INSUL H

PLES 6 WHEN RPM TURNED UP MOTOR STARTED TO OSELATE ALSO DONE AUTO TUNE WITH motor characteristics

SERVO NAME DUTYMAX DS

 

[Sidewinder]

I meant mate are the manuf' requirements for motor tuning to the drive with out without mechanics?

We used to tune our motors to the drives without mechanics, then run an optimising routine with mechanics.

It depends on the drive firmware mate to be honest and the algorithms there in.

If you are going to tune with mechanics you may need to input some mechanical parameters into the drive, such as reflected load inertia.

I know I'm not too clear at this time of night especially as I was not well this a.m. and am still working sorry!

 

[Sidewinder]

^quite mate, normal with a resolver repair.

I have put Moosey in touch with a guy local who can do resolver/servo motor repairs.

 

[NozSpark]

One of the items I used to fix used resolvers,, 1 for theta, 1 for Y and 3 for X.... We used to set them up connected to the gear box but with the motors turned off using an oscilloscope,,,, then we might have fine tuned them power on so to say

 

[steptoe]

:C

 

[NozSpark]

:C

My thoughts exactly

 

[batty]

I have an oscilloscope would not know what to do with it though not much call for it when house bashing.

 

[NozSpark]

I have an oscilloscope would not know what to do with it though not much call for it when house bashing.

Just twiddle the dials until you get a pretty picture