CORE One nozzle wiper

This is inspired by the excellent design by 6d6178.

In my version the arm is attached to the bed heater support from the underside, thus allowing you to attach it on the right side of the bed (shorter path for the nozzle to travel to the wiper from parked position), while leaving enough room for your finger to remove the print sheet from the same side.

Print details:

Print in heat-resistant materials such as ASA, PC (or composites), ABS, PETG, etc.! I recommend printing it on its side, as shown in the Slicer screenshot. I printed mine with Polymaker ASA at 0.2 mm layer height, 4 perimeters / top / bottom layers, and 15 % gyroid infill. It takes ~ 9 g of filament and 35 min to print.

Required hardware and installation:

1× M3×10 screw - I used one of the hex socket screw from the Prusa kit spares, but if you use a round head screw it will be slightly lower profile giving more room for your fingers when removing the print sheet. (The distance from the top surface of the support arm to the bottom surface of the M3nS nut is 8.7 mm, so a M3×8 screw could also work in a pinch. You can also use longer screws than M3×10, though it'll protrude more from the bottom, and potentially hit the floor of the printer when the print bed is at its lowest position.)

1× M3nS square nut and (optional) 1× M3 flat washer

Insert M3nS nut all the way into the slot, the screw hole should align with the holes in the wiper arm. Insert M3×10 screw through the unthreaded hole in the diagonal support arm of the heat bed, while sliding the printed wiper arm onto the metal support arm until everything aligns. When aligned properly, the wiper arm should be flush against the heated bed, the small hook at the end of the wiper arm should also be flush with the contours of the metal parts. Tighten the screw to secure everything together.

Silicone wiper pads and custom G-codes:

Though my design has a different shape than 6d6178's original design, the silicone wiper pad is at the exact same location, so you can use the same custom G-code for the original. Please refer to the superbly detailed description from 6d6178's design for information on sourcing the silicone wiper pads, as well as the custom G-code.

Here's an example of the G-code I use (generated from the tool made by 6d6178):
Go to PrusaSlicer -> Printers -> Custom G-code -> Start G-code, and find the line G29 P9 X208 Y-2.5 W32 H4. Replace that with the following:

; G29 P9 X208 Y-2.5 W32 H4 ; <- stock nozzle cleaning
; Start Prusa CORE One/+ nozzle wiping sequence
; REF: X204.70 Y-12.60 Z2.20
G0 X192.870 Y-16.005 Z1.00 F3000
G0 X192.870 Y-13.845 Z1.00 F3000
G0 X187.875 Y-13.845 Z1.00 F3000
G0 X187.875 Y-16.005 Z1.00 F3000
G0 X182.880 Y-16.005 Z1.00 F3000
G0 X182.880 Y-13.845 Z1.00 F3000
G0 X192.870 Y-16.005 Z1.00 F3000
G0 X182.880 Y-16.005 Z1.00 F3000
G0 X182.880 Y-14.925 Z1.00 F3000
G0 X192.870 Y-14.925 Z1.00 F3000
G0 X192.870 Y-13.845 Z1.00 F3000
G0 X182.880 Y-13.845 Z1.00 F3000
G0 X170.300 Y-18.845 Z1.00 F3000
G0 X205.450 Y-18.845 Z1.00 F3000
G0 X205.450 Y-11.005 Z1.00 F3000
G0 X170.300 Y-11.005 Z1.00 F3000
G0 X206.375 Y-12.525 Z1.00 F3000
G0 X204.525 Y-17.325 Z1.00 F3000
G0 X202.675 Y-12.525 Z1.00 F3000
G0 X200.825 Y-17.325 Z1.00 F3000
G0 X198.975 Y-12.525 Z1.00 F3000
G0 X197.125 Y-17.325 Z1.00 F3000
G0 X195.275 Y-12.525 Z1.00 F3000
G0 X193.425 Y-17.325 Z1.00 F3000
G0 X191.575 Y-12.525 Z1.00 F3000
G0 X189.725 Y-17.325 Z1.00 F3000
G0 X187.875 Y-12.525 Z1.00 F3000
G0 X186.025 Y-17.325 Z1.00 F3000
G0 X184.175 Y-12.525 Z1.00 F3000
G0 X182.325 Y-17.325 Z1.00 F3000
G0 X180.475 Y-12.525 Z1.00 F3000
G0 X178.625 Y-17.325 Z1.00 F3000
G0 X176.775 Y-12.525 Z1.00 F3000
G0 X174.925 Y-17.325 Z1.00 F3000
G0 X173.075 Y-12.525 Z1.00 F3000
G0 X171.225 Y-17.325 Z1.00 F3000
G0 X206.375 Y-17.325 Z1.00 F3000
G0 X204.525 Y-12.525 Z1.00 F3000
G0 X202.675 Y-17.325 Z1.00 F3000
G0 X200.825 Y-12.525 Z1.00 F3000
G0 X198.975 Y-17.325 Z1.00 F3000
G0 X197.125 Y-12.525 Z1.00 F3000
G0 X195.275 Y-17.325 Z1.00 F3000
G0 X193.425 Y-12.525 Z1.00 F3000
G0 X191.575 Y-17.325 Z1.00 F3000
G0 X189.725 Y-12.525 Z1.00 F3000
G0 X187.875 Y-17.325 Z1.00 F3000
G0 X186.025 Y-12.525 Z1.00 F3000
G0 X184.175 Y-17.325 Z1.00 F3000
G0 X182.325 Y-12.525 Z1.00 F3000
G0 X180.475 Y-17.325 Z1.00 F3000
G0 X178.625 Y-12.525 Z1.00 F3000
G0 X176.775 Y-17.325 Z1.00 F3000
G0 X174.925 Y-12.525 Z1.00 F3000
G0 X173.075 Y-17.325 Z1.00 F3000
G0 X171.225 Y-12.525 Z1.00 F3000
G0 Z4.00 F3000 ; z-lift
; End nozzle wiping sequence

I bought the silicone wiper pads from Amazon (link, $6.2/3pcs). There's a cheaper version (link, $5/8pcs) but they appear to be slightly different shape and may be of lower quality, according to reviews on Amazon. I removed the double-side tape from the pads and used silicone CA glue (Amazon link, $5.4) to secure it to the wiper arm.

Changelog:

• 2026-03-27: Added stopper tab that inserts under the heat bed to stabilize the wiper arm when installed.

• 2026-03-03: Initial release