Quote:
Originally Posted by Gavin J
Hi, just acquired an old Drummond lathe, not too sure about the model but it has been converted to single phase. The wiring is very old and scary, lots of bare terminals.... so i need to re-wire, there is a three way switch which I assumed to be off / forward & reverse, but it doesn't appear to do anything at all. When I switch on the motor stalls ( garage lights dim also) but with a gentle hand start it spins away. Any tips on wiring, want to put a better switch on too.
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Hi, first let me intoduce myself. I only just joined today when i came accross this forum. Congrats to Quaterbone.
The motor that you show I could not believe my eyes as I have exactly the same motor that I got with a Lathe that was given to me, this Metal Lathe used to be long to a late Uncle of mine.
He made this lathe over 50 years ago using 1st a peice of old light railway track as a bed that he had machined down.
Anyway I brought the lathe back to working order, cleaning down etc, then got to assemble the motor. Now these old Hoover motors were used a lot in the sewing machine industry in the 1950s, one thing that Hoover did was to make them easily reversible.
My motor was only wired for anti-clockwise so I had to take the plate away that hold the wires and find the starter windings inside, once I found these it was simple to be able to reverse using a intermediate switch.
Your motor is already reversible and no wiring needed this saves you some time.
All you need is:
1 An on/off switch from the mains
2 Another emergency stop switch also on the floor that you can stop with your foot(as this can save your arms)
3 Get a Intermediate switch (Outdoor one I used) as they are heavier duty
You have 3 cables coming out of the motor, the 2 brown cables go to the intermediate switch, take the 2 wires out of one and wire into the top 2 terminals on your switch and the other 2 to the bottom terminals.
The other cable goes to your mains with your on/off switch wired in between, and between the mains cable and the on/off switch wire your emergency stop switch.
Then when finished turn the motor on with the intermediate switch switched to the top and if the motor goes anti clockwise then that is forward and mark the switch forward at the top or vice versa if it is going in reverse.
Note: do not use the intermediate switch whilst the motor is running as it will do nothing, has to be in the position required before starting up the motor.
The reason your motor will not run unless you turn it by hand is I guess by the look of your switch it is the contacts are seized so not sending any power to the start winding which tells the motor which way to run. Anyway the switch look very dodgy at best.
Anyway I hope you can make sense of my dribble here if not I will try to help further.
Again congrats to Quaterbone for making this forum possible.
Top marks.
Linear Mode
