Clarke CL500M Lathe conversion to Inverter drive

[martin perman 1Participant @martinperman1]

[martin perman 1Participant @martinperman1]

Gentlemen,

 

This is my first posting on this Forum and I’m wondering if anybody knows a supplier of good make 3/4hp three phase motors for my lathe.

I have recently acquired a Seimens 420 inverter and now I’m looking for a four pole motor to go with it to convert my lathe.

 

Thanks,

 

Martin Perman

[Donald WittmannParticipant @donaldwittmann92536]

Try ” Inverter Supermarket ” they have all the top makes, you will certainly get one to go with your Seimens 420.

Donald.

[martin perman 1Participant @martinperman1]

Interesting site thank you.

 

Martin P

[Sub MandrelParticipant @submandrel]

Hello Martin,

 

If you look at the ‘unmitigated woe’ thread you will see some advice I’ve been given on this topic.

 

As a stop gap I’m part way through making a countershaft so I can use a Hoover 0.5HP single phase motor. A second pulley this evening and I’m motoring.

 

How do you intend to connect the new motor, as I doubt a 3-phase one will fit?

 

Please report back on what yiou do and how you get one.

 

Neil

[The Merry MillerParticipant @themerrymiller]

 

 

You might do well to check out Inverter Drive Supermarket as suggested.

 

I recently purchased a 3/4 H.P. Marelli three phase motor from them, it was frame size 71 with a 15mm dia. shaft. You should be able to get full dimensions from the Marelli website.

 

I was surprised how very much smaller it was than the old Brook Crompton single phase 3/4 H.P. motor.

 

Don’t forget that Inverter Supermarket also sell made up screened cables for connecting the motor to the inverter. It all went like a dream.

 

Len. P.

 

 

[The Merry MillerParticipant @themerrymiller]

 

 

You might do well to check out Inverter Drive Supermarket as suggested.

 

I recently purchased a 3/4 H.P. Marelli three phase motor from them, it was frame size 71 with a 15mm dia. shaft. You should be able to get full dimensions from the Marelli website.

 

I was surprised how very much smaller it was than the old Brook Crompton single phase 3/4 H.P. motor.

 

Don’t forget that Inverter Supermarket also sell made up screened cables for connecting the motor to the inverter. It all went like a dream.

 

Len. P.

 

 

[martin perman 1Participant @martinperman1]

Neil,

 

I dont envisage any problems fitting a three phase motor, at the moment , the inverter is going into its own box as I want to fit a potentiometer to control the speeds plus an EM Stop. The unit is fan cooled so the box will also have filter inlet and outlet ports to stop muck getting in, a bit OTT you may think but I work with these units in my job and they will run for ever if you look after them.

 

The reason for change is the flexibility I will get, thread cutting wont be so frightning because of the fast lowest speed I currently have, DC Braking etc.

As it comes together I will keep you in the loop.

 

Martin P

[Sub MandrelParticipant @submandrel]

Thanks Martin,

 

Funnily enough low speed has never been a problem, for me, my lathe went down to 16 rpm. but it’s a1999 Clarke one – there are different controller boards and they can be set up differently.

 

 

Neil

[martin perman 1Participant @martinperman1]

Neil,

 

I have the model with the mill fitted and belt drive with no speed control, you must have the yellow one, dont know the model no )

 

Martin P

[Sub MandrelParticipant @submandrel]

CL300M, made by SEIG the same as the ARC ones, I know because the mains filter in it says ‘SEIG’ on it

 

I have everything working now, just gutting the old controller board to make up a start/stop NVR box.

 

Neil

[John ThorneParticipant @johnthorne49048]

HI

I have just fitted a IMO Inverter and 3 phase motor to my Warco WMT300. It was a WMT300/2 until I bought a “proper” mill earlier this year. Very pleased with the results.

 

 

[georgelane314Participant @georgelane314]

Hi John. I realise it is nearly 14 years since you posted about your ” proper mill” purchase. I’m now in a similar position with the same issues I guess with the miling head on the 300/2. Can I ask what mill you ended up buying and was it Sooo much better? Cheers, George.

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