Prusa i3 ANET A8, Z Endstop Adjuster.

by flyingferret, published

Prusa i3 ANET A8, Z Endstop Adjuster. by flyingferret Apr 9, 2016
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Update Remix this to allow use of optical endstop.

After having to use the poorly designed Z stop adjust for too long, here's a mod that is based on a few different "things" I've seen on here.

Simply remove the two left bolts from LHS Z motor, place motor mount over and replace old bolts with ones 2mm longer (M3 x 12mm).

Attach micro switch to the mount using two M2 14mm bolts and nuts ( I used some locktite here once in correct place).

On the adjuster there is a cut out for an M4 nut (very tight fight to ensure no backlash, so you may have to file out or use a soldering iron to fit the nut).

Once nut is fitted thread thru a M4 Bolt/Screw ( For belts and braces i also added another nut to act as a lock nut).

Now lower the Z axis down slowly towards the micros switch and ensure everything lines up. Now tighten the microswitch in place with the M2 Bolts and nuts.

Good Luck.

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Was a mission to get the nut in :) mine was a little thick, melted it in with soldering iron ;) managed to get my bed cranked all the way down and leveling was so much easier!

I like your design, sadly the lower part is too high for my bowden setup, can you possibly make a new version with a lower bottom part? Or send me the file so i can adjust it myself?

Best regards,

I made this using my OMNI turned out good TY.

I printed this on my Delta while building my A8. So much better then the not even aligned stock setup :) Thanks man!

The print came out nicely! But even with the screw turned all the way out of the mount, I almost have to unscrew the bedscrews all the way.
Not sure why it's different than in your pictures. The sizes are correct to mount it properly. Anyway... It works ;-) Thanks a lot!

Would it be possible to get more detailed installation pictures? I can't figure out where the bottom part is supposed to go, or how the switch is supposed to be mounted.

I have printed this its great, suggestions would be to thicken up the top section of the support where the screw slide slot is by about 3 to 5mm, also give it a bit more support either on 45 deg support on each side to help with the downward force load at the home position or another way, if I think of another option I will let you know possibly even the upright of the support extending it down to the base of the machine so you get the bench support on the downward force of home position kind of like a t brace. other than that I like it and will use it till either I can or someone can improve on it. Good Job

If you have an A8 prusa i3... get this... it will save you so much trouble trying to reset bed levels. The acrylic frame didn't help the standard mounting for the limit switch from slipping and also this puts it in a much more accessible location. Modifications will be necessary, but nothing too drastic.