Ender 3 Linear Rail Mount for BIQU H2

thingiverse

This is an adapter to run a linear rail on the X-Axis of your Ender 3/3 Pro coupled with a BIQU H2 direct drive extruder. The needed hardware is as follows: 10pcs M3x6mm button head screws 4pcs M3 T-nuts There is no modification necessary to the end stop for the x-axis. Mount the linear rail with 4 of the screws and the t-nuts. Then, mount the adapter to the carriage on the linear rail using 4 more screws. Finally, remove the rubber stopper and slide the assembly all the way to your right and install the last two screw through the adapter and in to the BIQU H2 from behind. Now, you need to connect to the printer with a pc or through a raspberry pi and send the following commands to re-center the build volume. M206 X-4 M206 Y-10 M500 Make sure you hit enter after each command and don't skip the M500 as it saves the settings to firmware. You can adjust the Y offset a bit if you find that your Y end stop position differs from mine which will affect the centering. If your build is closer to the front of the plate use a larger negative offset, ie Y-12 etc instead of my Y-10. I try to run a bed leveling test that puts a square at each corner with a skirt to make sure my end stop and offset is correct. If the offset is too much you will hear the belt skip when the bed travels all the way forward. Kill the print and change the offset and try again. My goal was to make this as easy as is reasonably possibly. Linear rail should be positioned so there is 15mm between the end of the rail and the black plastic of the end stop. You will have to remove the rubber stopper from the left side of the rail but leave the right side in after you have assembled everything.