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Posted by Lee Griffiths on March 30, 2008, 3:35 pm
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The motor has broken on our Clarke lathe so I've been looking for a
replacement. The switch broke too and this it proving difficult to replace.
The systems runs a 3/4 hp with reverse and a 16mm drive shaft.
I can source a 3/4 hp with 19mm drive shaft and reversing starter at
around £180 - gulp
I've thought about just getting a cheap pillar drill and using the motor
and one-way switch...
Just wondered if anyone had any other leads/ideas
thanks in advance
Lee
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Posted by Bob Minchin on March 30, 2008, 4:38 pm
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Lee Griffiths wrote:
> The motor has broken on our Clarke lathe so I've been looking for a
> replacement. The switch broke too and this it proving difficult to
> replace.
>
> The systems runs a 3/4 hp with reverse and a 16mm drive shaft.
>
> I can source a 3/4 hp with 19mm drive shaft and reversing starter at
> around £180 - gulp
>
> I've thought about just getting a cheap pillar drill and using the motor
> and one-way switch...
>
> Just wondered if anyone had any other leads/ideas
>
> thanks in advance
>
> Lee
You should be able to get a cheaper motor on ebay and an NVR switch.
The shaft can be turned down on the lathe. Bolt the motor on the bed
dead true on the lathe axis. Mount a tool bit at centre height or a thou
below. Power up the motor and reduce the shaft until the pulley fits.
Make sure you are turning parallel by regular measurement.
Bob
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Posted by Ron van Sommeren on March 30, 2008, 5:59 pm
Please log in for more thread options Goedendag Lee ;-)
> The motor has broken on our Clarke lathe so I've been looking for a
> replacement ... ... around £180 - gulp
Build the motor yourselve?
www.yahoogroups.com/group/lrk-torquemax
(Don't worry, I took care of spammers and viruses right from the start of
the group)
Excellent motorbuilding articles by Brian Mulder,they cover the all the
basics, a must read:
http://www.southernsoaringclub.org.za/
-> Articles by SouthEasterners.
-> Electric Motors - part 1-5
Do-it-yourself motor homepages, manuals/tutorials, checks and tests in this
motor builders tips and tricks thread. The checks and tests [b]may save you
from frying your controller[/b] or motor. Thread is active, bookmark it for
future reference and subscribe to it:
http://www.rcgroups.com/forums/showthread.php?t=240993 (sticky thread, at
top of that subforum)
The 'bible'
http://translate.google.com/translate?u=http%3A%2F%2Fwww.powercroco.de%2F&langpair=de%7Cen&hl=en&ie=UTF-8
Two instructive motor winding/assembly videos, 14 & 10Mbyte respectively
(cd-rom and lrk have different winding diagrams!)
http://www.youtube.com/watch?v=iHYlWKICkqc&e
http://www.youtube.com/watch?v=Ybb0Ysh0FRE
Vriendelijke groeten ;) Ron van Sommeren
near Nijmegen, the Netherlands
int. electric fly-in http://home.hetnet.nl/~ronvans/
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Posted by Cheshire Steve on March 31, 2008, 4:46 am
Please log in for more thread options > The motor has broken on our Clarke lathe so I've been looking for a
> replacement. The switch broke too and this it proving difficult to replac=
e.
>
> The systems runs a 3/4 hp with reverse and a 16mm drive shaft.
>
> I can source a 3/4 hp with 19mm drive shaft and reversing starter at
> around =A3180 - gulp
>
> I've thought about just getting a cheap pillar drill and using the motor
> and one-way switch...
>
> Just wondered if anyone had any other leads/ideas
>
> thanks in advance
>
> Lee
Presumably this a single phase motor ? Are you stuck for space (motor
diameter and length), or is there plenty of room ? Interesting to know
why it went, a 3/4 horse should be plenty for a small lathe. Maybe it
overheated and the replacement would benefit from extra cooling.
Machine Mart list a cheap and cheerful motor that might do the job
(3/4horse 19mm) for =A370 ish - but then the same may happen to that.
Or maybe you should take the opportunity to swap to three phase motor
and use a phase converter, as modern phase conveter/inverter units
allow all sorts of nice soft start, fast stop options, so act as your
starter, and at the same time they allow speed control.
Steve
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Posted by Lee Griffiths on April 3, 2008, 6:10 am
Please log in for more thread options Thanks for all the advice guys - that will get me going!
Lee
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> replacement. The switch broke too and this it proving difficult to
> replace.
>
> The systems runs a 3/4 hp with reverse and a 16mm drive shaft.
>
> I can source a 3/4 hp with 19mm drive shaft and reversing starter at
> around £180 - gulp
>
> I've thought about just getting a cheap pillar drill and using the motor
> and one-way switch...
>
> Just wondered if anyone had any other leads/ideas
>
> thanks in advance
>
> Lee