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Wolfe Industries-3K build
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Cpnwolfe



Joined: 29 May 2012
Posts: 454
Location: Rockhampton/qld


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I'm hoping it is not such a glass cannon next time!

I am trying out the "make your own wheels" as colsons just take too bloody long to get here.











how the insides sit now with no aluminium just have to make a new spot to mount the eletronics and batts, make the wheels smaller (doh) and whizzbee is ready to test.
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Post Sun Apr 03, 2016 1:27 pm 
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Nick
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Those wheels look pretty good - I like how you cut the tabs and screwed the tread on from the sides rather than on the face of the wheel.
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Post Sun Apr 03, 2016 2:38 pm 
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Cpnwolfe



Joined: 29 May 2012
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Location: Rockhampton/qld


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work just bought some new machining equipment and was going to send the old mill to the local auctions.

I found out and told my boss I wanted it and he sold it too me for the princely sum of one carton! Very Happy (then they dropped it on the ground with the forklift and broke/bent some bits off, and the cross slide does not work in the x axis)



Dang it was fun getting off of the ute it sure is heavy!



Dragged it in under my house into my basement by myself was fun.



Had to alter the stand as my ceiling is not that high, makes working on the mill a little low but not much i can do about it.



Juuuust enough clearance and that is a 2.1 ceiling.


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Post Fri Apr 08, 2016 5:36 am 
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shakesc



Joined: 14 May 2012
Posts: 62
Location: UK


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That looks a beast
Hope you can get it all working

Post Fri Apr 08, 2016 5:46 am 
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Nick
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I think the boss owes you half a carton back - or whomever dropped the mill off the forklift. Those RF45 mills are hard to kill and getting spares should be fairly easy.
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Post Fri Apr 08, 2016 5:50 am 
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Cpnwolfe



Joined: 29 May 2012
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Location: Rockhampton/qld


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Machining friends!

The x-axis on the table would not budge so i tore the whole thing down for a clean and repair,



The "nut" that moves the x-axis thead it worn down to bumps no thread left at all, any idea where i would find a new one for a 30+ year old machine? or do I just try to make a new one?





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Post Sat Apr 09, 2016 7:48 pm 
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Glen
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http://www.grizzly.com/products/Drill-Mill-with-Stand-29-inch-x-8-inch-Table/G0705?utm_campaign=zPage

I got all the ones for the same mill at work from here and had someone retrieve them in the US. maybe you could get em delivered to steve and co during battlebots.

Otherwise buy some ACME leadscrew and nut off ebay and make your own Smile
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Post Sat Apr 09, 2016 8:23 pm 
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Nick
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Or maybe upgrade to ballscrews while everything is apart.
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Post Sat Apr 09, 2016 10:45 pm 
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Spockie-Tech
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Joined: 31 May 2004
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Location: Melbourne, Australia


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Helicoil for a quick cheap fix ?
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Post Sun Apr 10, 2016 11:19 am 
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Valen
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Joined: 07 Jul 2004
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If the nut is worn down that much what is the screw like?

I'd think about ballscrews but on a manual mill you are going to be depending on the friction in the screw to hold it in place against side loads, reverse driving a ballscrew is relatively easy.

For a quick fix we have got a bunch of brass powder (ok it was swarf) mixed it with epoxy and cast it over a very well lubricated screw, seemed to work ok.
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Post Sun Apr 10, 2016 11:38 am 
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Cpnwolfe



Joined: 29 May 2012
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Location: Rockhampton/qld


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all very good ideas thank you! got to mull over it a bit
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Post Sun Apr 10, 2016 3:01 pm 
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Nick
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There is a special epoxy made for replacing broken nuts; I read a review and the writer was happy with the results. The problem you would have is that the screw is probably very worn in the middle and not so much at the ends, so it will either bind up at the ends or be very slack in the centre, depending on what part on the screw you cast the epoxy around.

You can buy ball screws kits on eBay pretty cheap and its likely that the ACME screw parts are available too.
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Post Sun Apr 10, 2016 3:17 pm 
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Cpnwolfe



Joined: 29 May 2012
Posts: 454
Location: Rockhampton/qld


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the leadscrew must be made of magical metorite as it has not worn much at all (.1mm) over the length.

I ended up trying some jb weld on the nut, Lubricated the shaft , it did not build up enough to be usefull.

Found this guide on a random google search

http://bbs.homeshopmachinist.net/threads/43645-Making-Acetal-leadscrew-nuts-the-easy-way

so i thought I would give it a try.



(Failed attempt)



Finally got one to work


now just have to weld the boss to the plate and try it out

9F60DF96723C.jp

the black dildoey thing in the nut is an indicator so I knew when they were the same height.
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Post Fri Apr 15, 2016 7:58 pm 
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Nick
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Nice work! Perhaps its worth doing on the other axis?
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Post Fri Apr 15, 2016 8:24 pm 
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Cpnwolfe



Joined: 29 May 2012
Posts: 454
Location: Rockhampton/qld


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the mill a few months later is still going great with the new nut,

alrighty then nats build time got some more done on whizzbee



tray for batts and esc



new wheels (skateboard)



double checking weight (still looks good atm)



just making the guts look pretty
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Post Tue Jul 05, 2016 10:38 pm 
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