Loading
Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!
profezzorn

adjustment-free Z endstops and wobble isolator

by profezzorn Sep 5, 2012
Download All Files

Thing Apps Enabled

Please Login to Comment

Yes it would. (In fact, it says so in the Instructions)
It might require some firmware hacking which I have not done. (yet)
I'm working on re-building parts of my printer, so I might do that soon.

It occurs to me that this thing could be made much better if we replace the switch with a pressure sensor.
That can be made much more sensitive and wouldn't have to push very hard on the bed, which would make it better suited for bed leveling.

actually i "hacked" the firmware (enabled the bed leveling) and it works. it touches three corners,
but i haven't made it print yet. I had some issues with the auto bed leveling that the firmware was to big for my chip (atmega644p) so some features used by it had to be left out.
i hope it'll let me print nicely :)

oh and sorry for not reading the instruction, could have saved me lots of time :)

have you seen http://www.thingiverse.com/thing:220709

that might be a better solution.

because the contacts would be more reliable ?

Auto touch Z end-stop
by radus

Microswitches are always going to be more reliable than metal-on-metal, metal-on-metal has much shorter switch distance though, which can potentially make it more accurate. I think either solution would work fine in practice, as the basically do the same thing.
(I've been running my printer with my solution for ~2 years with little or no maintenance, so obviously I'm pretty happy with my solution.)

i just had an idea, could you use this for auto bed leveling ?

i don't really see how it works. does it move up and down with the threaded rod ?

Yes. it moves up and down when the threaded rod spins. The X axis rests on top of it. Once it goes low enough that the X axis rests on the print surface, the switches activate.

excellent idea! no adjustment needed. i'm also using Jonas Khulings X ends without the top constraint nuts so this design is perfect.

See the "derived from" link.

Nice. I had a similar idea, but I was going to have the extruder lift from the X carriage instead of lifting the X axis off the Z screws. That might be light enough to take the flex of the print bed out of the adjustment.