This is an adjustable bracket to attach a BLTouch probe to the X carriage of a version 2.1 Wanhao Duplicator i3 and its clones (Monoprice Maker Select, Cocoon Create, etc.)
This Thing only provides the physical mount for the probe, and this writeup does not cover other aspects of getting a BLTouch probe installed and working in a Wanhao i3, such as wiring, firmware configuration, and controller board modification or replacement.
Note that this mod requires the removal of the stock front cooling fan and duct. If you're running one of the popular cooling mods like Thorped, Diiicooler, etc. then this is already taken care of.
- Minimize X and Y probe offset from hotend (to maximize range of bed mesh probing)
- Maximize Z height of BLtouch when pushed to the top
- Keep probe as rigid and level as possible
- Keep the probe from getting tilted/skewed during Z height adjustment
- Cleanly handle routing for the BLTouch wires
BLtouch to bottom part
- (2) Flat / Pan head #6-32 x 3/16" screws (i.e. coarse thread computer case screws)
Using screws with thin heads will maximize clearance when the probe is at its top adjustment point. I used something like this.
Bottom part to top part
- (2) M3 x 12+ mm bolts (the design can accommodate longer bolts if necessary)
- (2) M3 flat washers
- (2) M3 nuts
Top part to X carriage
- (2) M3 x 10mm bolts
- (2) M3 nuts
This Thing is part of a set of mods I've designed for this printer - here's the rest of the set, I hope you find them useful:
1) Clean up prints
2) Attach the BLTouch probe to the bottom part
Orient the bottom part with the flat side down, and slots for the M3 nuts facing up.
With the BLTouch oriented point down, attach the BLTouch to the bottom part as shown in the diagram. Use (2) Flat / Pan head #6-32 x 3/16" screws (i.e. coarse thread computer case screws).
- The screws go through the BLTouch holes and self-tap into the holes in the bottom part. Screw until snug, but do not overtighten.
3) Route the BLTouch wires through the hole in the top part
- Take the wires from the BLTouch and route them up through the hole in the inside corner of the top part.
My BLTouch had a 3-pin header and a 2-pin header, and both fit through the hole OK.
4) Attach probe + bottom part to top part
The adjusting bolts should be tightened enough to remove the slack, but loose enough that the bottom part can be moved up and down.
5) Attach full assembly to X carriage
6) Adjust probe height
- Set the probe to your preferred height and tighten the adjustment screws until snug.
I found the BLTouch calibration tool to be useful to get the adjustment screws in the right neighborhood.
7) Complete other installation work and calibrate the X/Y/Z offset of your probe
I run the excellent Klipper firmware on my printer, so I used this guide for setup and calibration.
For reference, using this mount, my X/Y offset from a Micro Swiss all metal hotend is configured like this in klipper:
This Thing opened my eyes to a new front mount option for a BLTouch probe:
I liked its concept, but thought I could improve upon the execution. I created a cleaned-up, simplified, non-adjustable variant of the above Thing first, before coming across this Thing and adapting its adjustable design:
All work was done from scratch in DesignSpark Mechanical 4.0, using STLs from the above Things as dimensional references. My DSM source file is attached.