Aluminium profile cnc build

[valdis034]

Valdis in Reply to your PM then can't see any major issues with the design. Couple of small suggestions but other than these nothing seriously wrong.

#1 I would brace the connection between bearing plate and gantry side.

#2 Would bring the rails on the Gantry to front slot to lessen the lever affect.

#1 If I move rails to the front slot i will have bigger gap between gantry and Z axis back plate (at the moment it is 3mm) if I am using wide carriages. Maybe i could use the narrow ones the same like on Z axis?

#2 How i could brace that connection? I have some of these so i could use them.

They are 40x40 and 6mm thickness.

OR this version?

[JAZZCNC]

#1 If I move rails to the front slot i will have bigger gap between gantry and Z axis back plate (at the moment it is 3mm) if I am using wide carriages. Maybe i could use the narrow ones the same like on Z axis?

I was going from your pics which looked like wide gap between z rear plate and gantry profile. Without seeing better view then can't comment further.

#2 How i could brace that connection? I have some of these so i could use them.
They are 40x40 and 6mm thickness.

No wouldn't use those and would go with something like your second option.

[valdis034]

Here it is. Between narrow carriage and gantry profile side is only 2mm gap, and the same dimension for wide one is 11.5mm. So the question is if I benefit a lot from wide carriages?

[valdis034]

Some small update from me :)
During last days as i been advised moved Y axis rails to the front slot, then made a bit smaller plate on which going Z axis motor so saved some unnecesary weight. Now trying to find out the cable routes..

For the cables and water pipes on the gantry I done a channel from 1mm sheet metal just to see how it looks. Not sure if it will be strong enough to hold the chain.. Any suggestions on that?



Started to look for the companies which does aluminuum extrusions, got some quotes. The best price for all the extrusions seen in my model was £340, which is bit more than i expected, but i guess thats the price for them. Does anyone knows a good supplier for them where i could get for the best price? Thanks guys.

[valdis034]

Hi. Here is what Fred wrot to me: Please attention the BK12 support we quota to you are in cheaper type with normal Deep groove ball bearing,if you prefer better quality BK12,we have P5 grade with Angular contact bearing type,seems many customers from UK are like this superior type,if change to P5 AC bearing type,the amount will be increase USD58.00 for the 4set.

Which one you would take? I seen somewhere talking about them cant find now.


Got quotes from aluminium warehouse for my aluminium plates, is it about right?


10mm plate

80 x 67 2pcs 6082 £4.10 ea tooling £5.46 ea
80 x 80 4pcs 6082 £6.58 ea tooling £8.75 ea
80 x 40 1pc 6082 £2.85 ea tooling £3.75 ea
114 x 120 1pc 6082 £10.76 ea tooling £14.32 ea
87 x 87 4pcs 6082 £6.58 ea tooling £8.75 ea
45 x 60 1pc 6082 £2.40 ea tooling £3.20 ea
50 x 60 1pc 6082 £2.00 ea tooling £4.20 ea

20mm plate

200 x 67 2pc 6082 £26.30 ea tooling £35.00 ea
200 x 50 1pc 6082 £16.40 ea tooling £21.81 ea

25mm plate

45 x 60 2pcs 6082 £6.00 ea tooling £7.98 ea
50 x 60 2pcs 6082 £6.58 ea tooling £8.75 ea
Cariage £22.30

[JAZZCNC]

Yes go with the P5 AC bearings they are far superior and worth the extra cost.