Shape Library

0,0

rodw wrote:

tommylight wrote:

0,0

x2

There's a bug in your math module...technically that's 3

0,0X2=0 ????

I really hope no one sees this......
Phill, what are the chances of adding a square tube thingy to this ? Some details :
4 Axis machine with say X is the long one, Y is the short one, Z is the usual automatic THC thingy and A is the rotating one,
Since we use THCAD and that thing is fast and smooth, i would skip all the complicated math required and just have A axis move in 90 degree increments as that would simplify everything immensely, the only thing remaining to tackle would be at every A axis move of 90 Degree there would have to be added an Y axis move of the width of the square tube, say 80mm, and the THC would do it's job of following the up and down during that period. There is also the caveat that the feed rates of the A and Y axis would have to be tuned to move in sync so the torch does not loose position, but that is another topic altogether.
New thread, or delete and disappear ?

rodw wrote:

Sheetcam has a wrapped rotary module that basically treats the rotating part as if its a straight axis. I think you have to pay for it.

I am aware of that and i am not interested in it. I already have two rotary machines that cut round tubing using only Inkscape and LinuxCNC, one of them made all the cuts for an 82x36 meters border crossing "tent" or "hut" or whatever that is called, all made by round tubes and everything made on that machine !

rodw wrote:

I think that if the Z axis has high enough acceleration and velocity, it should be able to follow the material up and down via THC control as it turns. I don't think there is any complicated maths required. Just let the THC do its job.

Yup, i did test that a few years back and i could cut up to 80x80mm with just two axis and THC. Was a bit tricky to set up but it did work as a test.