Long linear rods June 28, 2014 07:24AM |
Registered: 9 years ago Posts: 26 |
Re: Long linear rods June 28, 2014 07:50AM |
Registered: 11 years ago Posts: 474 |
Re: Long linear rods June 28, 2014 08:25AM |
Registered: 9 years ago Posts: 26 |
Re: Long linear rods June 28, 2014 12:52PM |
Registered: 11 years ago Posts: 1,320 |
Re: Long linear rods June 28, 2014 07:51PM |
Registered: 11 years ago Posts: 474 |
everything that large usually uses something that supported all the way rectangular linear rails and bearings are the rule but they're very expensive. Cheaper alternatives not so accurate would be maker slide or continuously supported round rods from the VXB or similar. And mount them to a structural member such as an extrusion here is a picture of a large router I made about eight years ago I don't know if you could make out the supported rails on the gantryQuote
Yaro
How much diameter need to be to have a lenght of 1000mm? To avoid is weight, it's possible to use a linear chrome tube?
Re: Long linear rods June 30, 2014 03:52AM |
Registered: 9 years ago Posts: 26 |
Re: Long linear rods June 30, 2014 08:41AM |
Registered: 11 years ago Posts: 474 |
the point is you can't do anything that large with a round unsupported rod there is a point where bigger diameter rod doesn't make it any better because of its own weight unsupported one thousand millimeter long is out of the question for anything accurate. What are you trying to build I think somebody mentioned hollow rod which is better but trying to buy a good hard hollow round Rod 25 mm diameter would be very expensive and hard to get. And still that would not be the best solution still would not carry hardly any weight. For 400 mm long 10 mm diameter is probably okay for a printer but I would use 12 mm diameterQuote
Yaro
It's bit heavy to build. If i use from 300 to 400mm bars, which diameter do you advice me? more diameter on X axis that have also a Y axis on it, or X and Y same diameter?
Thank you.
Re: Long linear rods June 30, 2014 09:00AM |
Registered: 10 years ago Posts: 20 |
Re: Long linear rods June 30, 2014 09:48AM |
Registered: 11 years ago Posts: 474 |
that's a good idea I been around motorcycles all my life and I've built machinery and I never thought of it that's is definitely a good ideaQuote
ybanrab
If you do want long, smooth hollow tubes, check out a motorcycle breakers yard (or eBay/craigslist etc). Look for forks for small off-road style bikes which haven't been crashed. The fork legs are tough and chromed on the outside. As an added bonus, the industry already sells bronze bushings ready-made to slide on them
The issue you'd have, going that route would be finding enough of them, and dealing with the mess of freeing the stanchions (the chromed tubes) from the fork legs.
Re: Long linear rods June 30, 2014 02:04PM |
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Re: Long linear rods August 07, 2014 04:57PM |
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Re: Long linear rods August 24, 2014 02:00AM |
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Re: Long linear rods September 19, 2014 03:30PM |
Registered: 12 years ago Posts: 81 |
Quote
Miertam
Would a 3 axis bearing like a roller coaster wheel work in this situation? You could use thiner rods/tubes with support welded to the back. If you used tubes you could make the supports do double duty as connectors allowing you to create a linear run as long as you want.
Thanks Mike