I am running with tek 6 servo drivers and Anaheim Automation BLWR235D BLDC motors.
The setup was put together ( finaly) in January of this year ( 2008).
It worked and behaved extremely well.
On 5 micron resolution sensor cutting diagonal lines ( with a v groove tool) we could observe a peak to peak ripple of about 2.5 micron measured with a microscope with a graticule.
A very happy combination.
About a month ago I decided to replace the humble spiral cut wire loom conduit with a drag chain.
Not a happy decision on a couple of fronts.
Initially the supplier of drag chain supplied only half the number of links and end clips and then on a weekly delivery schedule from his manufacturer delivered the remaining portion of the drag chain five weeks later.
Now comes the sad part.
The wiring harness was repackaged into the drag chain, machine reassembled and fired up.
The usual please press the reset button to get the system to run took place and... it did not want to play.
Impatiently I kicked it in the guts ( pressed reset button ) a few times in quick succession and lo and behold one of servo amps released a nasty brown smell and a quantity of smoke.
I doubled over ( machine had just returned the abdominal favour).
It was late of the evening, no chance of chewing on cncteknix ear.
The following morning I spoke to Pete at cncteknix. It was a nice cry session.
Anyway I ordered a new servo driver plus a spare.
During the course of the day I spent some time investigating reasons for the unusual failure.
The track carrying the main load supply ( from +24V connector pin had fused). I figured... an arm of the bridge went tits up.WHY?
It turns out that the motor windings became shorted to the motor case.
Further investigation revealed I had not ( on this particular motor ) included a washer beneath the mounting screw head. This in turn allowed the screw to penetrate too deep into motor cavity, cut through a thin FR4 shim and contact the coil windings. May be taking the motor off and replacing it once too often did the trick.
Anyway the motor was reassembled, returned to its rightful spot plus washers ( what did the nut say to the bolt?... NO NO NOT WITHOUT A WASHER).
No shorts to ground.
Next step to test Pete's what seemed like an off the cuff comment: "... may be the bridge is not damaged, its good for 45amps peak...".
The burned out track was repaired and lo ad behold the machine would reset.. the motor and the axis worked and the machine is back...running.
How do I tell Pete I don't need the two servo amps?
Please help.
Nah just kidding. What I wanted to say was .. a great servo amp Pete..
Thanks.