[f1nch87]

Hey Guys,

im new here and just started to plan a small Desktop CNC for cutting Wood and maybe Alu.

Im just in the early beginning and designed a Linear Guide. Can u guys tell me if this would work in every Axis of the CNC (X,Y,Z).
It is made of steel and i would put two if this guide`s in every axis. Thanks

[alan_3301]

Sorry, but it looks very complicated to assemble, and very weak. Unless you have a surplus a steel U-channel that you must use, I would copy the design of cncrouterparts for a cheap and easy setup. Another option is to watch ebay for linear rail/bearing deals. They come up all the time.

[RCaffin]

Nice idea, but there are SO MANY things to go wrong.
Buy some linear bearings instead. (You will eventually, anyhow.)

Cheers
Roger

[f1nch87]

Sorry, but it looks very complicated to assemble, and very weak. Unless you have a surplus a steel U-channel that you must use, I would copy the design of cncrouterparts for a cheap and easy setup. Another option is to watch ebay for linear rail/bearing deals. They come up all the time.

Thx for the tipp with cncrouterparts. They look really nice and i could let them roll on a steel t channel. But i have to look how hard they to design for me. Maybe i could manage them

[f1nch87]

Nice idea, but there are SO MANY things to go wrong.
Buy some linear bearings instead. (You will eventually, anyhow.)

Cheers
Roger

I dont want to spent that much just on the bearings. And this would be cheap and i could adjust them exactly just pressing with screws on the thread between the ballbearings.
And dp u guys really think this would be weak? It is steal with 4 and 5 mm thickness.

[RCaffin]

One could argue that the bearings and the screw are EVERYTHING.
But it's your call.
Cheers
Roger

[hanermo]

Wont work.
I tried it in 2004.

It is not rigid enough, the bearings are not accurate enough, the surface is not flat enough, the axels bend.
I used 42/15 mm bearings, with rated loads of 200 kg.

A proper linear bearing is about 100x more rigid, with a load of about 2000-5000 (Hiwin W35-CC) kg, per block.

I will work fine re: movement, but will not work well for cutting anything.

[f1nch87]

Wont work.
I tried it in 2004.

It is not rigid enough, the bearings are not accurate enough, the surface is not flat enough, the axels bend.
I used 42/15 mm bearings, with rated loads of 200 kg.

A proper linear bearing is about 100x more rigid, with a load of about 2000-5000 (Hiwin W35-CC) kg, per block.

I will work fine re: movement, but will not work well for cutting anything.

Ok thanks.


http://www.cncrouterparts.com/linear-carriage-adjustment-p-100.html

So this would be a better decision to build?