OpenBuilds Style Build

[WoodKnot]

OK, I have read everything that has been said so far!

All the machines that I have seen, watched, use this profile, on wheels, no rails, many belt driven and they knock out some nice stuff.

I know that you have all said they flex, so how are they managing it. Many make 1500mm x 1000mm machines from this stuff!

I thought by putting some HGR 20 linear rails on, that would introduce a lot more rigidity into the build

Most of the upgrades that people are doing is that, but often using 12mm rails and occasionally 15mm rails.

Most are still using 8mm Acme ball screws, I went for Rm1605, so twice the thickness.

Yes, I have seen the issues with long 8mm screws 1500mm long, I believe you call it whip or something else?

So I have exactly 40mm to play with between the rails, less the HGR20 carriages.

WoodKnot

[JAZZCNC]

OK, I have read everything that has been said so far!

All the machines that I have seen, watched, use this profile, on wheels, no rails, many belt driven and they knock out some nice stuff.

I know that you have all said they flex, so how are they managing it. Many make 1500mm x 1000mm machines from this stuff!

It's not that they can't do it and it's not that you can't make nice stuff on them. I've seen and know people who have built machines using threaded rods on a very flimsy frames which made some really nice stuff, but they took forever, snapped tools for fun because of chatter and vibrations, and for every 1 made 2 or 3 got scrapped. This soon gets NOT FUN and expensive.

I've said it many times but I'll repeat it for others to see.!
These machines are great for learning but if you want to make accurate parts easily and repeatably without breaking tools and with minimal cleanup and frustrations they are not strong enough. The more detailed the work the more frustrating it will be, and this is why many that build or buy these kits only keep them a short period of time before building or buying better-made machines like what I build.
I have sold machines to several people now who started with Shepoko or work bee's etc and they all said the same things regards snapping bits, poor finish, slow cutting, high maintenance, and frustrations, etc.
All of them are blown away at the difference and didn't realize just how poor their old machines were until using a properly built machine.