Thread: My build log
Hi, i am now prepared to start my cnc router, with the help of a friend.
It will be made to cut up to aluminum, both for pleasure and hopefully for selling bits and bobs.
I will be using 60mm x 60mm x3mm steel box for the build.
The size will be 1500mm x 1000mm, and i will be using a 2.2kw water cooled spindle.
I will be building this once, to last the test of time.
I asked Chai for advice and what i would require, and this is what he supplied me.
x4 SBR16-1500mm supported rails
x2 SBR16-1000mm supported rails
x2 SBR16-200mm supported rails
16pcs SBR16UU bearing blocks
x1 RM1605-1500mm total length screw with a ballnt and end machined
x1 RM1605-1000mm total length screw with a ballnt and end machined
x1 RM1605-200mm total length screw with a ballnt and end machined
3pcs Nut housings
3pcs 6.35mm*10mm couplers
I will get photos up once i make a start to it, which will be monday.
Alex, I would have asked on here before ordering anything, I will be looking at a similar sort of size build & had been looking at 20mm supported rail, you sure 16mm will be up to the job? Doubt there is that much difference in price for the difference it might make to the machine. The other thing is do you know what usable Z axis travel you are going to have with a 200mm ballscrew? I know you may think you don't need much for what you intend to cut but our plans have a habit of changing once we realise what else can be done. If you only intend to build one machine then it might be best to make sure you cover all the bases.
Didn't notice at first glance but the other thing is that you only have one ballscrew on each axis. With machines of this sort of size then people would recommend 2 on the longest axis at least to ensure the gantry moves smoothly.
Always willing to listen and learn tho, and thats why i started the build log, to hear others views.
Alex, as Martin says I'm sure the 16mm rail will happily do the loads but the 20mm has an extra row of balls (5 instead of 4 I'm led to believe) and therefore has less play, also you will still be able to fit it to your 60x60 box. There's also not that much difference in price. You will definately need 2 ball screws as the gantry will rack badly at 1000mm wide and you could end up damaging your machine as well as your work piece. I'm sure Jonathan will chip in at some point soon and will probably recomend 1610 ball screws instead of the 1605 and using belts and pulleys to improve the resolution whilst still keeping the speed.
What electronics are you going to use as a matter of interest?
Any design pictures of your machine?Neil...
Thank you Neil. I hear what your saying and we wont be ignoring any good advice. Once we have the set up the way we want it, and its time for the electronics, we will be ordering them all built up and ready to plug and play.(cant remember where from, at the moment).
200mm is quite small for the Z-axis, but in a way that's good since if you can cope with having so little travel (50-80mm ish) it makes it easier to design a strong machine.
First off are the concrete blocks sitting on the ground or do you have concrete under them? Also what is the base sitting on near the wall is it slabs? The centres of the joists look quite far apart but that might be the photo. What are the centres? Also you will need to put some DPM between the base frame and whatever your are sitting it onto so that it doesnt suck up moisture.
I agree with the above pluss I think ;you are asking for trouble with settlement which would be a shame if you did all the work and the floor sunk. Its vital to get a decent foundation as you will be putting some heay stuff in there. the suports for the floor would be better under the long pieces fron to back and not under the bits that are just nailed to them. hope this helps. good luck with the build.
These were taken a few days ago, and weren't finished at that time. The blocks are sitting on a bed of concrete, the gaps are 610mm. The bearers that the frame will sit on will have damp proof on them. The floor will be 18mm ply, but will be looking at possibly cutting a section out where the machine will be sitting, and pouring a concrete bed, so that its solid. The photos are just to show a start has been made, but thank you for your comments, I'm always willing to listen and learn.
BUILD LOG: New Build - For Your Amusement - MK-2 buildBy Karl in forum DIY Router Build LogsReplies: 11Last Post: 11-06-2012, 08:34 PM