Gallery, Projects and General > The Design Shop
SIEG X2 Y Axis Power Feed Idea
MetalMuncher:
--- Quote from: efrench on August 03, 2015, 04:12:04 PM ---sdp-si has CAD drawings of the pulleys, so it should be easy to see how to modify them to fit.
--- End quote ---
Thanks. I see they also have my desired diameter in a type with flanges, but no hub. That would save some milling. Hopefully I'll have time tonight to get the Y axis screw retainer off and then learn if, and how much, shaft length could be picked up for placement of the pulley if I milled away some of the retainer. What would really be cool is if I could simply remove the inner collar of the handwheel as well as some of the retainer, to fit a pulley on the 10mm shaft that would be exposed. Might even be able to take advantage of the end of the keyway it has for the handwheel. If I could get a pulley with a matching keyway in it for a 10mm bore.
I wonder if anyone has ever used rounded keystock in such an application. I don't have a way to cut a square key channel, but certainly could do a half-round in its place.
efrench:
Just lock the Y axis and use the X axis to mill the keyway in the shaft. Use an endmill to remove most of the keyway in the pulley and finish with a file.
MetalMuncher:
--- Quote from: efrench on August 03, 2015, 07:14:38 PM ---Just lock the Y axis and use the X axis to mill the keyway in the shaft. Use an endmill to remove most of the keyway in the pulley and finish with a file.
--- End quote ---
By golly that would work! Thanks!
I took the Y axis retainer off tonight, and more closely measured the area where it meets the handwheel. I can get away with an 80mm pulley instead of 50mm, which will make it easier to find one with enough "web" to bore out its center to 20mm. The next thing I learned is that with a bit of machining on the round end of the retainer, I can increase my 11mm pulley width spec. all the way to 18mm if I want to. With those in mind I have found a good solution in this pulley from SDP-SI:
Part Number: A 6A 3M30H9508
It is a dual flange, no hub, XL pitch model that already has the setscrews threaded through the teeth. I looked at their 3D model of it, and I am reasonably certain I could bore its 8mm center out to 20mm. And 8mm just happens to be the size of the output shaft on the motor I will use to drive the project. So I can order a pair of these and get things underway. :)
efrench:
That's good news. Are you sure you want to drive it 1:1?
MetalMuncher:
--- Quote from: efrench on August 04, 2015, 01:28:24 AM ---That's good news. Are you sure you want to drive it 1:1?
--- End quote ---
I'm pretty satisfied with the speeds I get on the X axis, so I think 1:1 will be fine using the same drive unit on the Y axis. If I change my mind after using it I can switch out a pulley.
I've not decided yet how I want to tension the belt, or how long the belt will be. Once I get the pulleys and drive unit here on the bench I'll work all that out.
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