Originally Posted by millman52  Right now I am using Ox/fuel. Even with that I can cut accurate 1/2" holes in 1/4 thru 1/2. I would imagine smaller with plasma.
Looking at your drawings The V wheel idea will work. I think you'll find it hard to get the spacing between the angle close enough to keep the carriage from being tight in spots then loose in spots. I think also it will be very hard to keep in parallel alignment to keep the carriage from wobbling.
Have you thought of using a length of cold rolled square key similar to pic below? Depending on length of gantry it might get a bit heavy. Probably need to be 1 1/4-1 1/2" square.
If money isn't a big issue I recomend precision liner rail for your gantry. I was able to find a couple 34" lengths of 15MM on Ebay with bearings. I didn't have trouble with butt joining them. If I were buying new I'd probably get 20MM or 25MM but the 15MM is working fine. |
Yes I considered what you described with CR But I thought by the time I added The gear rack and 72" of solid bar it would get too heavy???
I have the exact same concerns about the angle getting tight spots and line-up. I could possibly machine a slight groove for the angle to set in and use screws to anchor it in place might even have to machine the whole thing. It would most likely end up in a barrel when I'm done... Just thought I throw it out there. I like the Idea of larger wheels on the carriage but how much do I want to fight inventing the wheel. I really don't think much of cam followers... I do like the precision rail ...except the cost...Decisions Decisions....
Thanks for the input.