View Full Version : Stich Welding

10-23-2007, 01:33 AM
Helklo group

I am about to start on a new cnc router, I am thinking of using 100 by 50 ( mm ) RHS ( on the vertical ) with a 10 ( or 12 ) by 100 flat bar welded to the bottom of the RHS to provide a mounting point for the linear rails ( I want to get all the mechanics below the table top ).
Any suggestions as to for far apart to put the welds, and how long they should be, I was thinking 10mm welds on 250mm centers, staggered on the bottom and side of the RHS, the machine will be 3.4m long so getting them machined isn't an option ( I live in rural Australia ).

Thanks for your help.


greg b
10-23-2007, 08:14 AM
Do you have a small drawing so we can get a good idea on what your constucting so we can help with your welding needs regards greg

10-23-2007, 04:04 PM
Hello Greg,

The attached dxf is a end view of the axis, the length will be about 3.4m, the two arrows are where I'm thinking of putting the stiches, staggered on about 250mm centres, possibly 10mm long. I have drawn the RHS as 100 by 50 and the flat bar as 10 by 100.

The linear rails will mount on the flat bar and be below to top of the RHS, the router I built ( from AL extrusions ) has the rail and screws above the bed, it is allways a juggling act to place and remove stock on the table, Still if the axis has a bend in the middle that could be worse.


greg b
10-24-2007, 07:26 AM
Im sorry mate but i can't open the files you sent with the drawing on it if you would like to email it to me i may be able to help with your questions regards greg. email familyball@optusnet.com

02-22-2008, 02:22 AM
Is it going to be steel or Aluminium? Mig/tig/arc Welded?
if its steel mig welded that design should be fine i would say

02-22-2008, 02:30 AM
for those that cannot open drawing

02-24-2008, 06:40 PM
What material?
What welding process are you using?