Thingiverse
Geeetech Prusa I3 ProB Reverse Z-axis (real Z wobble fix) by telamohn
by Thingiverse
Last crawled date: 4 years, 2 months ago
Reverse Z-axis motor mounts
Update 170831: This mod is WIP, I've accidentally got some unwanted Z-backlash that I'm currently tracing, I suspect it's the aluminium-spring-couplers
This mod reverses the position of your z-axis motors in order to let gravity lend a hand for stabilisation as opposed to the stock configuration where the weight of the x-axis actually amplifies the wobbliness.
Here's a somewhat relevant discussion on the subject: https://www.reddit.com/r/Reprap/comments/1xflhl/z_axis_motors_above_or_below/
There's a lot of other excellent solutions out there but some of them introduce backlash.
This solution utilizes only the stock parts and does not introduce any extra backlash , and I recommend using the stock nuts if possible. And worth mentioning is that this modification was surprisingly dead easy to assemble.
Just move your locknuts from the top of the smoothroods to the bottom instead and the rest of the assembly should fall into place by itself.
I almost forgot; You will also need to update your firmware configuration and invert your Z-axis direction.
If you're using marlin then make the following change:
//Configuration.h
#define INVERT_Z_DIR false // <-- invert to `true`
Update 170831: This mod is WIP, I've accidentally got some unwanted Z-backlash that I'm currently tracing, I suspect it's the aluminium-spring-couplers
This mod reverses the position of your z-axis motors in order to let gravity lend a hand for stabilisation as opposed to the stock configuration where the weight of the x-axis actually amplifies the wobbliness.
Here's a somewhat relevant discussion on the subject: https://www.reddit.com/r/Reprap/comments/1xflhl/z_axis_motors_above_or_below/
There's a lot of other excellent solutions out there but some of them introduce backlash.
This solution utilizes only the stock parts and does not introduce any extra backlash , and I recommend using the stock nuts if possible. And worth mentioning is that this modification was surprisingly dead easy to assemble.
Just move your locknuts from the top of the smoothroods to the bottom instead and the rest of the assembly should fall into place by itself.
I almost forgot; You will also need to update your firmware configuration and invert your Z-axis direction.
If you're using marlin then make the following change:
//Configuration.h
#define INVERT_Z_DIR false // <-- invert to `true`