Prusa Core One Nozzle Wiper Remix V1 and Purge Bin

This wiper has been superseded by a new revision with several improvements: Improved dimensions for precise fit A right side version Slim profile for unobstructed LED status bar visibility Improved silicone pad position allows wiping on the whole pad Browser-based wiping sequence G-code generator Check out the new >> Core One Nozzle Wiper V2 with Purge Bin <<.

This is a nozzle wiper arm for the Prusa Core One that uses Bambu Lab A1 nozzle wiper silicone pads.
It's a remix of the Core One Nozzle Wiper Remix V1.1 by Ed.

Changes to Ed's Version

• Flattened the front so that it can be printed on its side without supports

• Reduced the overall thickness so that it doesn't block the LED status bar under the bed as much

• Providing two versions with heat-set inserts: Voron spec D5.0 and RatRig spec D4.6 inserts

• Providing version with square nut

• Providing version with hex nut

This also includes a modified version of Ed's Core One Purge Bin Remix that fits the modified wiper arm.

Required Hardware for Wiper Arm

Heat-Set Insert Version

All sourcing links have been tested by me unless otherwise noted.

Square Nut Version

All sourcing links have been tested by me unless otherwise noted.

Hex Nut Version

All sourcing links have been tested by me unless otherwise noted.

Printing The Wiper Arm

Print the part with its front face facing down. The STL files are pre-rotated for printing.

Recommended Settings

The part is long and skinny which makes it prone to warping on the narrower side. I highly recommend using a brim if you choose to use a material that likes to warp.

• Material: Use a material that is suitable for the temperatures inside the enclosure. I used Prusament PC Blend. Other suitable materials: PC Blend CF, other PC, ASA, ABS

• Layer height: 0.2mm

• Extrusion width: 0.45mm

• Perimeters: 4

• Infill: 15% Gyroid

• Supports: no

• Brim: recommended

Purge Bin

Magnets

Depending on which version you use you will need either…

• up to 5 20x5x2mm neodymium block magnets

• up to 4 20x10x2mm neodymium block magnets

• up to 10 6x2mm neodymium disc magnets

• up to 8 8x2mm neodymium disc magnets

• up to 5 10x2mm neodymium disc magnets

You don't have to use all the magnet pockets. The magnet pockets have 0.2mm clearance around the magnet (0.4mm larger than magnet nominal size).

Customize in Onshape

Use different magnets? You can customize the Purge Bin magnets in Onshape and change the type, dimensions, rows, columns, and clearance in the Configurations panel in the upper left of the sidebar. 

To export, right-click on the part and select “Export”. In the Export dialog, select STL as the output format and set the units to millimeters.

Printing

Print the Purge Bin with the built-in "0.2mm Structural" profile in a material that can withstand the temperatures. Considering that it bears no load and isn't close to a heat source, PETG should be sufficient.

Installation

For installation and Start G-code modification please refer to the documentation of the original model. I used exactly the same G-code except that I added two more wipes across the pad for good measure.

Adhesive

According to this video, you should ideally use a silicone adhesive to bond the pad to the printed part. 

I have tried the adhesive that came pre-applied with the silicone pads from Aliexpress but it failed after about a couple of prints. The adhesive remained on the silicone pad but stopped sticking to the PC Blend printed part. 

I now use 3M 300LSE adhesive tape on top of the factory adhesive that failed and it's been holding like a champ for several months. Feel free to try different adhesives and report your findings in the comments. 

Start G-code Adjustment

In order for the printer to use the wiper you need to replace the stock nozzle cleaning command with a sequence of wiping moves.

In the “Start G-code” editor under “Custom G-code” in the printer settings, find the line that starts with

G29 P9 X...

and replace it with the following G-code snippet:

;G29 P9 X208 Y-2.5 W32 H4 ; stock nozzle cleaning
G0 X40  Y-14 Z1.5 F10000;
G0 X76 Y-18 Z1.5 F10000;
G0 X40  Y-14 Z1.5 F10000;
G0 X76 Y-18 Z1.5 F10000;
G0 X40  Y-14 Z1.5 F10000;
G0 X76 Y-18 Z1.5 F10000;
G0 X40  Y-14 Z1.5 F10000;
G0 X76 Y-18 Z1.5 F10000;
G0 X40  Y-14 Z1.5 F10000;

Remixing

STEP files are included, with a dummy silicone pad and heat-set insert. You can also create a copy to modify in Onshape: 

https://cad.onshape.com/documents/5b3897977821cb84aa960c8c/v/102883af2649da3b992cbd0b/e/6e4dc12b048003864f109dd6 

See description