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Re: DIY Hobby Size 5-axis mill
Alright dissected everything again and now its coming together. Ready to fit and extend the y axis. I'll have to order a new ballscrew. Got aluminum for machining some 4th axis stuff. Couple things left to do and I can start fiddling with 5th axis.
Here's some more pics
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Re: DIY Hobby Size 5-axis mill
Little update
After shimming the extended base down I welded it to the steel it rests on. I have 1/2" bolts holding the rest of it down where the mounts allow. I was thinking about braze welding the cast iron together as a more permanent solution. I'm still waiting for the longer c1 ballscrew in the mail to arrive so I can put everything back together and start drilling holes into the rest of the components.
I was about to make a stepper motor mount from a solid piece of aluminum for my rotary table. And quickly decided it would be easier to test it out by welding some flanges to a piece of pipe. I decided to machine the whole thing down because it looks nicer.
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Re: DIY Hobby Size 5-axis mill
I got a used harmonic drive off ebay for a decent price. Seems to work just fine. I'm making an aluminum housing for it and the stepper motor. It will bolt to the steel mounting body. Allowing me to upgrade to a better drive in the future, if I need.
These tapered roller bearings are actually wheel bearings that I snagged from work that are in excellent condition. The harmonic drive will directly turn a shaft. The shaft is a machined 1" bolt that is applying preload between the wheel bearing and another bearing housed inside a machined 2" piece of pipe.
I know it may not be incredibly accurate with the worm driven 5th axis backlash issues. But this is the absolute best way to learn, without forking out a ton of money into something you're unsure of. I use what I can get my hands on for little to no cost. I've already learnt so much just by thinking about how it all gets put together.
Here's the two rough cad drawings of the main dimensions.
I'll post some more pictures as I go.