mark chandler
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| posted on 6/4/20 at 11:58 AM |
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Rotary welding table
After plenty of years struggling to weld round objects and with time on my hands I had a google and have come up with this.
Total cost, I had an old chuck is around £25
Bearings £8
Shaft from scrap
Myford gears, lying around
240v >12v power supply £5
12v speed controller £5
12v low ratio motor £8
Off cut of steel sheet
 
Rotary welding table inside
 
Rotary welding table outside
I need to wrap the shaft with some braided earth lead so the bearings are not destroyed when running, the electrical bits are fully isolated from the
case.
All I need now is something to weld, I have some throttle bodies to mate to a manifold so this may be my first use
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Mr Whippy
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| posted on 6/4/20 at 03:06 PM |
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Yeah that's very fancy, one of those tricky tasks made a lot easier. You could use a relay to trigger the motor from the welding torch trigger
(assuming your MIG...) or use the foot controller for a sewing machine??
£25 pounds though, hmm you should write a book 
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mark chandler
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| posted on 6/4/20 at 05:10 PM |
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Haha
Yes, may be many times more than expected.. 
I,m hoping to up my TIG game, next will be a fixture to move the torch in a straight line so I just have to feed wire in pulse mode.
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Angel Acevedo
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| posted on 6/4/20 at 05:26 PM |
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quote:
Originally posted by mark chandler
I need to wrap the shaft with some braided earth lead so the bearings are not destroyed when running, the electrical bits are fully isolated from the
case.
Could you install a copper band interference fitted to the shaft and use some heavy duty carbons a-la electric-motor-brush to achieve the desired
functionality?
Beware of what you wish.. for it may come true....
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mark chandler
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| posted on 6/4/20 at 09:49 PM |
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Interesting thought that, the shaft turns slowly, maybe 10rpm flat out although in use maybe 2rpm, the shaft is a bit of stainless I had laying
around that machined up to a very smooth finish.
I have some phosphors bronze so could make a sprung loaded hinge and run this against the shaft.
Food for thought thank you.
[Edited on 6/4/20 by mark chandler]
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big_wasa
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| posted on 7/4/20 at 11:08 AM |
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Making something similar is just about on the very long to do wish list.
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Simon
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| posted on 8/4/20 at 08:25 AM |
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Have a look for a you tuber called This Old Tony. He built one recently and his vids are quite amusing
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mark chandler
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| posted on 14/4/20 at 08:02 PM |
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This old Tony is very good, it’s a hybrid of his although the motor despite the low gearing is not that powerful so I may upgrade to a stepper
motor.
Just need a welding project now!
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