100% Homemade linear guiding

[ABEngine]

Opinons are needed here!

Before starting to build my CNC plasma cutter, this is what I come out with for a homemade linear guiding (see the pic). Any comments are welcome.

[LaserImage]

Just one question - are you relying on gravity to hold everything in place?

[samco]

looks trapped to me..

sam

[PaulRowntree]

the z carriage plate looks to be about in-line with the front bearings of the long-axis carriage, putting the centre of mass on the plasma head outside the centre of support area. On woodworking designs the router is usually within the footprint of the long-axis carriage. Would this cause a twisting moment for a plasma head?

How would you do the final adjustments to take the play out of the carriage/rail systems?

[ABEngine]

LaserImage: I attached a pic adding a support table.

Sam: What's seems to be the problem for you. Thanks for any comment.

Paul: Plasma cutter is usually offset from the carriage axis (load is not an issue I believe).

The idea is using steel profiles and ordinary rollers for the whole system. Now, I'm not sure about precision/accuracy even for "rough" plasma cutting.

[mactec54]

Hi ABEngine

How big is your machine going to be, as long as you have lots of the angle supports you should not have any problems, just don't weld the angle support brackets Screw/bolt them as they will bend your rails

Good job, you have found another way to use the skate type bearings

[LaserImage]

Originally Posted by ABEngine LaserImage: I attached a pic adding a support table. Sam: What's seems to be the problem for you. Thanks for any comment.

I didn't see the bearings behind the tube, I thought that there wasn't anything holding it in place. Sam was commenting on that, saying that it was indeed held in place "trapped".

I glanced at it too quickly and made an assumption based on that quick glance.

Gary

[Mick40]

Great design!

[RICHARD ZASTROW]

Eccentric cam rollers would permit adjustment.

Dick Z

[jnymarkp]

Nice design!

What are the dimensions on the square tubings compared to the weight of the carriage? thinking that they may bend if not held in place.

What software did You use to draw this?

/Jesper

[Trell]

Good Ideal
But check the one I just built
It may give you some more ideals

I will try to post pics later if I can but here is the link to the pictures
Trell

http://www.ecosee.com/picturesnow@ec...ter/index.html

[ABEngine]

Thanks for all comments.

I plan to build a 4'X8' plasma table. Maybe 1" square is enough as the two can be linked in the middle by bolted angles. The idea is to avoid welding as much as possible. I use Inventor for drawing.

AB