The Shop > Tools
micro mill electricals problems, help please!!
bertie_bassett:
shame the motor has gone as well as the board, was hoping it would be a simple fix for you, but at least now you know what's wrong.
definitely don't give up on it, you'll only lose money getting a newer one, and who's to say that wont take lots of work to get set up just right.
better the devil you know I think, you've got a good machine all set up, just need something to power it with. Any reasonably powerful motor with speed control should do the job. treadmills seem a good source if you can get one cheap. or even something like a washing machine motor could get it running again.
velocette:
Hi Paul
Followed this posting with great interest loads of help and good advice.
Now you are faced with how to get the best option to get back to milling again.
I have an X2 mill drill that has been radicalised so it is hard to recognize.
The treadmill motor is a good option however it can be a shoehorn job as they are all bigger than the original motor.
Anything over 110 mm diameter and the job becomes much more difficult.
This is controller I can recommend as I have in use three on various workshop machines.
The flywheel and pulley are removed and discarded and pulley fabricated to fit.
I have not had any problem running the motor in either direction that has the brushes at 90 deg to the centre line of the shaft.
http://www.surpluscenter.com/Electric-Motors/DC-Motors/Motor-Speed-Controllers/90-180-VDC-SPEED-CONTROL-W-POT-11-2269.axd.
This is basic unit that you have to wire up yourself and setup for the motor power you drive with it.
You probably have access to many more options and at more competetive prices.
Eric
John Rudd:
--- Quote from: velocette on January 31, 2015, 11:55:24 AM ---Hi Paul
Followed this posting with great interest loads of help and good advice.
Now you are faced with how to get the best option to get back to milling again.
I have an X2 mill drill that has been radicalised so it is hard to recognize.
http://www.surpluscenter.com/Electric-Motors/DC-Motors/Motor-Speed-Controllers/90-180-VDC-SPEED-CONTROL-W-POT-11-2269.axd.
This is basic unit that you have to wire up yourself and setup for the motor power you drive with it.
You probably have access to many more options and at more competetive prices.
Eric
--- End quote ---
The Minarik controller is pretty much like the KB series, although the low level circuitry is powered by an isolated supply (the onboard transformer )....
steampunkpete:
Personally I would look to buy from a UK source where possible. If things go wrong it's easier to send things back. It's also worth considering that postage from the US is not cheap and added to import tax means that getting goods from the US is not necessarily cheaper than buying a functional equivalent in the UK.
pmdevlin:
Hi all, firstly, many thanks for the suggestions, and support this thread has given me, its been quite a learning curve! Here is where I am!
I seriously considered the treadmill motor, even bid on one that was on fleabay local, but, then I thought I still need a controller of some sort, and would need to fabricate some sort of motor mount, and in the end, I would be cannibalising a nice machine that has sentimental value, not to mention some upgrades, I know where its been since new, I know who supplied it, so, the friend who I got the machine off was a model engineer, I had two model boats of his that had been in the attic for nearly two years, these raised £100 last week on ebay, so in a strange way, he funded the repair :clap:
I had a few long conversations with arc euro trade, who had the record of the original purchase. They tested the motor and board on a machine, and found both faulty. The motor was ok on low speeds, but once running fast, massive arcing, sparking, and the smell of death. I am considering writing to the guy who pumped AC through it and ask for a contribution, which I think is fair?, any thoughts? The fet I fitted had failed, more than likely due to me! the pot was faulty, and there was possibly damage on the circuitry. The motor had more that likely ruined the work John had done.
So, the saga was prob, board fet all along, cheap easy fix! John fixed this, but in the meantime the motor is damaged by the "expert", which then resulted in the motor taking out the repaired board, so I now have a new motor, new board, new pot, £200!! :doh:
Hopefully all is ok now. I ran the motor at various speeds for 15 mins, it was stone cold, all seemed well. Arc euro suggested that as I only use the machine now and again, wrap the motor up to insulate it, and I have now brought the controller indoors, to stay in the house until needed................... Missus wont let me bring the lathe in! so that will be the next saga... :D
Many thanks
Paul
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