Page 1 of 1

Bar across the back...

Posted: Mon Sep 10, 2012 2:04 pm
by Max Metz
After completing the X and Y axis mechanically I included a piece of 18mm diameter very fine gauge steel tube across the back between the two motor Y axis plates with a piece of 5mm threaded rod running through it to tension it up between the rear idler holes - it does't make the carriage completely rigid but it does make it more so.

The threaded rod is between the top and front side (not central) of the 18mm tube so the 18mm tube just misses the x axis carriage bottom bolts as it travels from side to side.
2012-09-10_21-36-51_710.jpg
2012-09-10_21-36-51_710.jpg (271.07 KiB) Viewed 2982 times
To cut the tube to length, it was held between the two motor plates and marked by rubbing it lightly against the stainless steel edge, then the 18mm steel tube cut with a small tube cutter. To fit I just rotated the tube between the two stainless steel plates to where I wanted it and then ran the 5mm threaded rod though from one rear idler hole to the other and tensioned with; nut, washer,tension washer and washer; either end. :D

Re: Bar across the back...

Posted: Tue Sep 11, 2012 3:02 pm
by Pseudo
Yeah i was pondering the same issue myself... another idea i'll steal from you :P

Re: Bar across the back...

Posted: Wed Sep 12, 2012 2:30 pm
by Max Metz
Thanks Pseudo.

My machine has heaps of other peoples ideas and successes included, thrilled you might give one of mine a try. Enjoy the day mate. :D

Re: Bar across the back...

Posted: Fri Sep 14, 2012 2:10 am
by jzatopa
I was thinking about trying something like this after I first saw the shapeoko at the Chicago maker fair, I guess you beat me to it :) Does it make much of a difference?

Re: Bar across the back...

Posted: Fri Sep 14, 2012 3:48 pm
by Max Metz
jzatopa the bar does make some difference but it does not solve the whole problem, hopefully the dual motors will complete the solution. Best regards. :D