By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Forum House Ad Zone

Phoenix lathe back in action

Jury-rigged drive arrangements are working.

All Topics | Latest Posts

Search for:  in Thread Title in  
Stub Mandrel21/12/2011 19:16:03
avatar
4318 forum posts
291 photos
1 articles
My lathe is now in operation again, after burning out the motor and controller board once and for all.
 
The Hoover fractional is on a piece of plywood screwed to the benchtop with a doorhinge. Bodged pulleys on motor and countershaft, but earlier I finished the first of three proper pulleys for the countershaft, and I'll have two on the motor.
 
I'm using the 6mm plastic belt which seems to do the job fine with alloy pulleys. If it wears too quickly I can increase the size of the grooves (the pulleys are from 1/2" checquer plate) and use a proper v-belt.
 
I made an NVR box, on switch on the motor bounces impressively on its board and the stopgap (drilled not bored) pulley ticks with each revolution. This will be solved with a new 2-step pulley. When you turn off the motor its back emf keeps the relays held on for a few moments, then when it slows so that the capacitor switch closes it kicks a flash out of the neon indicator!
 
The motor, nominally the same power but about four times as big, doesn't show any strain under load - it is clearly more powerful as if you take a big cut the toothed belt slips but the motor just keeps going, so some careful adjustment ( and possibly reversal of the worn) toothed pulley needed.
 
I'm getting very good finish, just with my new tangential tool, possibly because I used the breakdown as an excuse to get all the slides just so.
 
The most interesting thing is how it is now a very, very different machine.
 
One thing I'm not sure of is - can I keep stopping and starting an old 1/3 horse fractional like this?
 
 
So by Christmas I should have something like 12 speeds (2 motor pulleys, 3 'layshaft' pulleys and then 2:1 back-gear, wiithout too many overlaps. I might not even need to change to a 3-phase/inverter solution...
 
Neil

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Sign up to our Newsletter

Sign up to our newsletter and get a free digital issue.

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts
Support Our Partners
cowells
Sarik
MERIDIENNE EXHIBITIONS LTD
Shopping Partners
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest

 

Donate

donate