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Welding Rotator

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Welding Rotator

Postby LtBadd » Sat Apr 29, 2017 8:13 pm

So here is the preliminary build of my rotator, it works as is but it's still not finished. The wood base is temporary and I want to fab a frame that'll allow me to position this from horizontal to vertical.

Spent quite a bit of time looking for components, the best find was the Dayton 90v DC motor along with speed controller, forward/reverse and foot control, all came as a package, used on eBay.

I know Jeff and maybe a few others are in the process so I thought I'd start a thread.

Img_0530a.jpg
The plate I had cut at a local laser shop with slots for 3 and 4 bolt pattern, my first Fusion 360 project
Img_0530a.jpg (43.43 KiB) Viewed 352 times


Img_0532a.jpg
Foot control on left then speed/direction box
Img_0532a.jpg (50.36 KiB) Viewed 352 times
Richard

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Re: Welding Rotator

Postby Poland308 » Sat Apr 29, 2017 11:36 pm

I like the ground cable on the spring.
I have more questions than answers

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Re: Welding Rotator

Postby Otto Nobedder » Sun Apr 30, 2017 3:06 am

Beautiful!

And that's exactly how I'd have done the ground. 10,000 contact points and not grounding through the bearings. I would "lubricate" the ground contact point with No-Ox-Ide A or similar to prevent corrosion/tarnishing from interfering with contact down the road.

Nice build!

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Re: Welding Rotator

Postby exnailpounder » Sun Apr 30, 2017 8:53 am

Nice Richard! I am having a few engineering problems with the way I want mine built but I think I have it figured out. The most important thing to me is I want the whole thing built out of junk parts I have accumulated (read garbage picked) and shade tree engineering. Awesome idea for the ground strap on the spring!
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Re: Welding Rotator

Postby motox » Sun Apr 30, 2017 8:56 am

richard
i have an old 4 jaw chuck. maybe ill build one too.
I'm sure i need another project..lol
mind if a hack a few of your ideas?
nice build!
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Re: Welding Rotator

Postby LtBadd » Sun Apr 30, 2017 9:25 am

Thanks everyone, that motor has great low end torque, I've used name brand units that would falter at low speed but this thing is very consistent.

Craig go for it, I modeled this after a unit I saw on YT.
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Re: Welding Rotator

Postby exnailpounder » Sun Apr 30, 2017 5:21 pm

Hey Richard. This is the problem I am having so I am going to ask you this question...You said your wood base was temporary. When you fab one, which I assume will be metal, how will you isolate welding current from motor current? Right now with the wooden base and the belt, the 2 circuits are isolated but if you use metal for a base, you will no longer be isolated because of the bearings and metal fasteners right? I am going through hell trying to figure out how to protect my motor from welding current. If I stare at it long enough, I'll figure it out but I thought I might pick your brain here :lol:
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Re: Welding Rotator

Postby motox » Sun Apr 30, 2017 5:51 pm

jeff
you have a lath, fab up some nylon bungs to separate metal from bolts.
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Re: Welding Rotator

Postby exnailpounder » Sun Apr 30, 2017 7:32 pm

motox wrote:jeff
you have a lath, fab up some nylon bungs to separate metal from bolts.
craig

I was thinking about some Delrin sleeves and thrust washers..would Delrin be a good choice? I know it's very machinable.
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Re: Welding Rotator

Postby LtBadd » Sun Apr 30, 2017 8:23 pm

exnailpounder wrote:
motox wrote:jeff
you have a lath, fab up some nylon bungs to separate metal from bolts.
craig

I was thinking about some Delrin sleeves and thrust washers..would Delrin be a good choice? I know it's very machinable.

Sounds like you may already have an answer, I haven't gotten that far. :(

Question, may be stupid, even with a metal frame if the ground strap remains on the shaft, wouldn't the current take the most direct path (of least resistance)?
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