Steel framed fixed gantry draw slide build super cheap

[Zeeflyboy]

If that double row option is easier and cheaper for you then I wouldn't sweat it too much... The backlash from it will be fairly minimal and not going to be the limiting factor on this machine - It's still a big improvement over your original plan.

[Steel]

Today had a hour free to make a quick holder to test the thrust bearings i have, made a few mistakes but im kinda on track, there was a radial bearing that fits in the holder between the two thrust bearings but the bearing i was going to use was only 8mm ID no good as the shaft has a 10mm thread on the end lol

[routercnc]

If you have fitted thrust bearings either end and a ball/deep groove bearing in the middle then that will work OK. If you only have the thrust bearings then your coupling (assuming you are using one between shaft and stepper) will not like the radial loads.

The cost of the proper (e.g. BK12/FK12) parts is not too bad (~£22 for angular contact bearing block set at stepper end and floating bearing set at other end):
https://www.aliexpress.com/store/pro...612.0.0.xrHjqj



This price is if bought separately. If bought with the ballscrew and nut as a complete kit I think this would end up much cheaper.

[Steel]

I just found a 10x22x6 so yes thrust radial thrust

No wait i brought a 10x30x14 double angular bearing so ill just use that, heres a bearing holder i made for that bearing.

[Steel]

Made some progress on the build i got the y axis hooked up to the lead screw but that was about it.

Also found all is not what it seems with my BK12 fixed end blocks i brought as part of a kit off ebay
no angular contact bearings here just plain old 6001z's

[Steel]

After many emails with the ebay seller I was given 6 angular contact bearings for the BK12 blocks,
That should be a lesson for anyone buying BK blocks always ask the seller what bearings there fitted
with before you buy !!

Today i got around to fitting the lead screw for the z axis, i made the bearing holder and fitted it with a
3200-2rs that should take care of any axial load..I have also fitted a nut with grub screw to add preload

I decided to go belt drive so i can mount the stepper and not have it sticking up in the air.

[Steel]

OK well screw the draw slide idea this is my current build ...