Joined: 29 May 2012
Posts: 454
Location: Rockhampton/qld
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. _________________ Creative Instigation - Build Something Awesome!
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
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. _________________ Australian 2015 Featherweight champion
UK 2016 Gladiator champion
Sun Apr 03, 2016 2:38 pm
Cpnwolfe
Joined: 29 May 2012
Posts: 454
Location: Rockhampton/qld
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! (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.
That looks a beast
Hope you can get it all working
Fri Apr 08, 2016 5:46 am
Nick Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
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. _________________ Australian 2015 Featherweight champion
UK 2016 Gladiator champion
Fri Apr 08, 2016 5:50 am
Cpnwolfe
Joined: 29 May 2012
Posts: 454
Location: Rockhampton/qld
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?
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.
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
Or maybe upgrade to ballscrews while everything is apart. _________________ Australian 2015 Featherweight champion
UK 2016 Gladiator champion
Sat Apr 09, 2016 10:45 pm
Spockie-Tech Site Admin
Joined: 31 May 2004
Posts: 3160
Location: Melbourne, Australia
Helicoil for a quick cheap fix ? _________________ Great minds discuss ideas. Average minds discuss events. Small minds discuss people
Sun Apr 10, 2016 11:19 am
Valen Experienced Roboteer
Joined: 07 Jul 2004
Posts: 4436
Location: Sydney
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. _________________ Mechanical engineers build weapons, civil engineers build targets
Sun Apr 10, 2016 11:38 am
Cpnwolfe
Joined: 29 May 2012
Posts: 454
Location: Rockhampton/qld
all very good ideas thank you! got to mull over it a bit _________________ Creative Instigation - Build Something Awesome!
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
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. _________________ Australian 2015 Featherweight champion
UK 2016 Gladiator champion
Sun Apr 10, 2016 3:17 pm
Cpnwolfe
Joined: 29 May 2012
Posts: 454
Location: Rockhampton/qld
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.
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. _________________ Creative Instigation - Build Something Awesome!
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