Mk V power loss disconnect unit dead

ash · Post by **ash** » Tue Dec 04, 2012 2:41 pm

Hi,
I have a Shopsmith MkV 510. Nothing happens when I switch on. I have found the fault is the power loss disconnect unit. The switch and motor are fine if I bypass this unit. The UK replacement price is HUGE and way out of proportion to what is in it. Does anyone know if I can subsititute it with a no volt release starter found on most UK woodworking machines ? ( green button start/red button stop and won't restart on its own if the power fails and then returns ) It would be a fraction of the cost I have been quoted and probably does the same job as the faulty unit.

JPG · Post by **JPG** » Tue Dec 04, 2012 2:55 pm

ash wrote:Hi,
I have a Shopsmith MkV 510. Nothing happens when I switch on. I have found the fault is the power loss disconnect unit. The switch and motor are fine if I bypass this unit. The UK replacement price is HUGE and way out of proportion to what is in it. Does anyone know if I can subsititute it with a no volt release starter found on most UK woodworking machines ? ( green button start/red button stop and won't restart on its own if the power fails and then returns ) It would be a fraction of the cost I have been quoted and probably does the same job as the faulty unit.

Probably!

I would like to see the faulty unit.

Curious where it is attached to the SS.

ash · Post by **ash** » Tue Dec 04, 2012 3:14 pm

This is an image of the unit - I hope

ash · Post by **ash** » Tue Dec 04, 2012 3:22 pm

I have re posted the image in a larger size, the previous one was too small to show any detail

ash · Post by **ash** » Tue Dec 04, 2012 3:25 pm

I have re posted the image in a larger size to show more detail

ash · Post by **ash** » Tue Dec 04, 2012 3:30 pm

This is what it looks like

garys · Post by **garys** » Tue Dec 04, 2012 6:44 pm

I don't see any need or use for that device. I'd junk it and keep sawing.

The less electronics you have on your Shopsmith, the longer it will run troublefree.

ash · Post by **ash** » Tue Dec 04, 2012 7:12 pm

Thanks for the advice, do I gather this is not usually fitted. If so does the wiring run from the switch directly to the motor/capacitor?

JPG · Post by **JPG** » Wed Dec 05, 2012 3:16 am

ash wrote:Thanks for the advice, do I gather this is not usually fitted. If so does the wiring run from the switch directly to the motor/capacitor?

Typically, yes.

Is it possible it was added by a po rather than ss?

Connect the wires that went to the two right hand end terminals.

Tape off the wire that went to the left end terminal.

A pix would be helpful.

dusty · Post by **dusty** » Wed Dec 05, 2012 8:09 am

Is the purpose of this device to prevent power from being reapplied automatically after a primary power loss.

If that is its purpose, it is not "needed" UNLESS the Mark V has been somehow rewired to meet local (UK) code requirements.

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Mk V power loss disconnect unit dead

Mk V power loss disconnect unit dead

Image of Power loss disconnect unit

larger image

Image of Power loss disconnect unit