[electric2u]

question maybe wroung place,
Steel tubing verise aluminum on building a cnc. the spectes i see say the steel wall can very .020 or so. the bigges problem is i have a welder, but nothing to weld aluminum with. what are you thoughs on staightness on this.
thank you, kevin

[kevin swan]

Howdy Neighbour
What type of tube? square will very. round will be quite uniform. pipe will be all over the place in size and not very round

[electric2u]

i was looking a 1x3 steel tubing. i just what it to be stright

[nofx]

Use a linear rail system attached to the square tubing and that will be square.