Thread: DIY Linear Bearings
Ok - so it looks like its about turn time & back to the drawing board.
Are we talking 50mm x 3mm mild steel box?
It'll be bolted, not welded as I don't have the gear for that - but I do have a pillar drill & some taps, so should be able to cobble something pretty sturdy together.
Screws - i was looking at a Marchant Dice package on ebay...but given that i'm now looking at supported rails from Chai, i think it makes sense to get some screws from him as well - i'll need to look at what he offers & the pricing. If the steel does work out that much cheaper, then the budget shouldn't be an issue.
I'll call my local metal supplier tomorrow to get a quote for the steel box & then start drawing something up.
Also, if you're following that design..... don't... the single central screw for the X-axis will cause you hours of pain if you plan to cut anything stronger than cheese at the full width of the Y axis. Plan and budget for two screws and either 2 drives & motors or a single motor and pulley system unless you make the x-axis bearings really long to counteract racking. Go re-read some of the build logs, its been discussed in depth many times. If you're investing in a serious machine, best to get it right at the outset!
Last edited by irving2008; 04-08-2013 at 06:38 PM.
Cheers chaps - My original plan was to build it using a single x-axis screw...see how it goes then add a second at a later date if I feel I need it.
I'm now ditching the FLA-100 as a base design & am starting a new design from scratch with 50mm box.
My local supplier states £4.10/m +VAT as a base price, then depending on quantity it could be cheaper...they also quoted for cutting - 50p/cut as a rough ballpark but cheaper on multiples.
I'll get a bit further with the design & then start a build thread - then you can start ripping my plans apart again ;-)
So 4.10mtr = £30.75 for 7.5mtr, so that's same price has just 2mtr of Alu Profile or put another way you get 5.5mtr free for same money. . . . . Bit more pleasant on the Old wallet isn't it.!!
Crack on and let the fun begin.
Yep - t'is cheaper...but more work involved in assembly.
One more question while i'm designing...
I've been thinking more about dual leadscrews with a single motor for the x-axis - what's the most cost effective way of doing this & a good place for parts?
(looking more at costs rather than exact setup at the moment)
Your local bearing company may be the best place to ask, I use lots belts & pulleys and this what I find cheapest. . . . But failing that then there's likes of Bearing boys etc on-line. If you look around the forum others have posted links to places they've bought.
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