upgrade variable speed motor

[Richard Callaghan 1Participant @richardcallaghan1]

Hi

I am looking to upgrade my Clarke cl430 to a variable speed motor. I have seen that the pre-wired CL750 by Newton-Tesla which includes control unit has been recommended. Looking on their website I can’t see this listed. Does anybody know of an alternative variable speed motor that would fit my lathe?

Kind regards

Richard

[Richard Callaghan 1Participant @richardcallaghan1]

[John HaineParticipant @johnhaine32865]

Not all their packages are listed. I just fitted a 550w unit to a S7, they only list half and 1 hp on the website. Give them a call to ask.

[Richard Callaghan 1Participant @richardcallaghan1]

Thanks John, I will give them a call.

[Adrian R2Participant @adrianr2]

Some people have used industrial sewing machine motors (DC, lots of torque and IIRC much cheaper than an inverter setup) – I remember reading the threads fairly recently but can't find them now

[Richard Callaghan 1Participant @richardcallaghan1]

I have been keeping my eye out for such a motor for a while as it would be much cheaper this way. Nothing has popped up that I think would be suitable.

I had a budget in mind before purchasing this lathe and I bought it fairly cheap which leaves me with some excess cash to spend on it. I think/hope that the tesla motor may add value, not that I would ever sell it.

[Adrian R2Participant @adrianr2]

Found it – see page 3 of this thread:
https://www.model-engineer.co.uk/forums/postings.asp?th=177038&p=3

Edited By Adrian R2 on 22/03/2022 10:46:06

[Richard Callaghan 1Participant @richardcallaghan1]

thanks Adrian, i will have a look at this.

[John HaineParticipant @johnhaine32865]

One issue with these motors is that their maximum speed is usually ~5000 rpm, at which they presumably develop maximum power. You may therefore need another reduction stage to ~1500 rpm to match the lathe design – I assume that the existing motor is probably a 4-pole single phase induction motor, as will the NT replacement be, with a max speed of ~1500 rpm or a bit less (1800 for the 3-phase motor which they run off 60Hz).

[Richard Callaghan 1Participant @richardcallaghan1]

I know it’s been a while but thanks for all the replies and advice on this. with the help of a friend, we did manage to get a variable speed motor fitted Jack 563A Industrial Sewing Machine Heavy Duty 1HP Servo Motor for Most Machines | eBay and so far, so good.

I now have the old motor leftover and its for sale along with the mill drill attachment which I took off when I first bought the lathe. I notice that there is no for sale section on the forum so I will probably list these on FB market place if nobody is interested on here?

[Andrew TinsleyParticipant @andrewtinsley63637]

There certainly is a "for sale" section! Run down the right hand side of the forum pages and you will come to it.

Andrew.

[Richard Callaghan 1Participant @richardcallaghan1]

thanks Andrew,i dont know how i missed this

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