Vapingbad i need your wisdom

[Deleted]

VapingBad i need your wisdom in all things electrical.
The speed control for the spindle on my little proxxon mill has gone pop and i was wondering if you knew where i could lay my hands on one of these.

[thebishman]

Windows why dont you just fit a double apex flux capacitor instead? Then it will go up to 5.2 gigawatts!

[Deleted]

Jul 9, 2016 17:49:06 GMT thebishman said:

Windows why dont you just fit a double apex flux capacitor instead? Then it will go up to 5.2 gigawatts!

Nice one

[VapingBad]

Sorry I don't know, but a pop is probably one of the capacitors (big yellow blocks and medium round blue components) it looks a very basic and repairable.

Quick google
www.proxxon.com/en/service/request_for_spare_part.php

Or maybe a generic replacement
www.ebay.co.uk/sch/i.html?_odkw=proxxon+spares&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.Xproxxon+speed+controller.TRS0&_nkw=proxxon+speed+controller&_sacat=0

[Deleted]

Judging by the state of the board tracks its game over for this one.

[decoy]

Jul 9, 2016 18:05:46 GMT @windows said:

Judging by the state of the board tracks its game over for this one.

I think the technical term is FUBAR

[VapingBad]

You could repair it, but it wouldn't be a nice looking job, the output has gone completely postal, the right fuse could have reduced the damage but not prevented the fault. Since it is just a standalone controller I would think a generic replacement will be quickest and cheapest option. I have never worked with these and no doubt someone here knows more.

[calnorth]

Looks like a PWM motor controller which is operating at mains volts. In my experience of similar controllers its not worth attempting a DIY repair. The components themselves are likely awkward to get hold of (if marked?) and not necessary to design spec. Its the world of Triacs, Diacs and SCRs. Its also a safety issue at mains potential.

Is the motor ok? A new controller could be killed by a bad motor.

Washing machines are similarly driven... a microprocessor does the job of the variable pot.

[Deleted]

Jul 9, 2016 19:03:18 GMT calnorth said:

Looks like a PWM motor controller which is operating at mains volts. In my experience of similar controllers its not worth attempting a DIY repair. The components themselves are likely awkward to get hold of (if marked?) and not necessary to design spec. Its the world of Triacs, Diacs and SCRs. Its also a safety issue at mains potential.

Is the motor ok? A new controller could be killed by a bad motor.

Washing machines are similarly driven... a microprocessor does the job of the variable pot.

Im not sure about the motor so im going to bite the bullet and order a new board and motor from Proxxon.

[calnorth]

Jul 9, 2016 19:06:31 GMT @windows said:

Jul 9, 2016 19:03:18 GMT calnorth said:

Looks like a PWM motor controller which is operating at mains volts. In my experience of similar controllers its not worth attempting a DIY repair. The components themselves are likely awkward to get hold of (if marked?) and not necessary to design spec. Its the world of Triacs, Diacs and SCRs. Its also a safety issue at mains potential.

Is the motor ok? A new controller could be killed by a bad motor.

Washing machines are similarly driven... a microprocessor does the job of the variable pot.

Im not sure about the motor so im going to bite the bullet and order a new board and motor from Proxxon.

The controller should be the sacrificial link between the motor and the mains. The fuse doing the mains disconnect primarily.

I usually inspect a motor..brushes and visual state of the armature. Not necessarily changing the brushes but cleaning the armature to make sure its not damaged from arcing/wear. The manufacturer should know the failure type and advise?