Prusa CORE One/+ Articulated Nextruder Cable Chain Exoskeleton Skin

Built out of necessity - after a 48-hour print failed at hour 40 because a sagging Nextruder cable got jammed between the Nextruder and a rear motor causing the Nextruder to offset its position, this Nextruder Cable Chain is a must-have for any CORE One owner.

The Prusa CORE One/+ Nextruder Cable Chain is designed to work with the following configurations

• Single side spool feed with PTFE tube (No MMU3)

• MMU3 with side spool feed PTFE tube present

• MMU3 without side spool feed PTFE tube present

Any configuration can be modified to exclude the Nextruder mount and only use between 4-6 chain links connected to sway arm bracket only, which is otherwise sufficient for suspending the Nextruder cable.

Prusa Core One/+ Nextruder Cable Chain Features

• Multi-piece snap-together design aligns print layer orientation:

  • For either horizontal or vertical strength where appropriate

  • Provides precision for snap assembly

  • Provides smoothness for moving parts

• No braces, straps, ties, or other additional material required

• Makes your CORE One and its Nextruder look stylish!

Recommended Configuration Parts & Quantities

Part - Description	Image	Side Spool PTFE Tube	MMU w/ PTFE Tube	MMU w/o PTFE Tube	No Nextruder Mount Mod.
Chassis and Brackets:
Sway Arm Single-Mount Bracket - Standalone mount on sway arm		1
Sway Arm Dual-Mount Bracket - Sway arm mount to hold cable chain links		1
Chain Link Chassis - Link for cable chain		12			4-6
TPU Bumper - Padding for chain links that may tap against CORE One walls		6			4-6
Cable Chain Plates
Blank Plate Top - Top plate for non-linking brackets		2
Blank Plate Bottom - Bottom plate for non-linking brackets		2
Sway Arm Plate Top - Sway arm top plate for connecting chain links		1
Sway Arm Plate Bottom - Sway arm bottom plate for connecting chain links		1
Chain Link Plate Top - Top chain link plate for connecting links together		12			3-5
Chain Link Plate Bottom - Bottom chain link plate for connecting links together		12			3-5
No Nextruder Plate Top - Top cable chain termination plate for no Nextruder mount option		0			1
No Nextruder Plate Bottom - Bottom cable chain termination plate for no Nextruder mount option		0			1
Cable Chain Clips
Cable Chain Clip - Clip for bracket or links, without PTFE holder		5	1	15	Varies
Cable Chain Clip PTFE - Clip for bracket or links, with PTFE holder		10	14	0	Varies
Nextruder Mount:
Nextruder Mount Chassis - Frame to mount directly to the Nextruder		1			0
Nextruder Mount Plates Top - Top plate for Nextruder chassis		1			0
Nextruder Mount Plates Bottom -Bottom plate for Nextruder chassis		1			0
Nextruder Mount Clip - Nextruder chassis clip without PTFE holder		0		1	0
Nextruder Mount Clip PTFE - Nextruder chassis clip with PTFE holder		1		0

Recommended Print Settings

• Material:

  • All parts except TPU Bumper: PETG

  • TPU Bumper: 90A TPU

• Layer height: 0.15 mm

• Nozzle: 0.4 mm

Attached 3mf files are configured with various fill, support, and other settings.  Verify and adjust desired settings before printing.

Assembly and Installation Instructions

Alert, check all parts for imperfections, verify surfaces are clean, and all supports are removed.  Use a SAS-ACTO precision knife to help trim and clean up any parts as necessary.

1) Connect chain link plates to brackets and chassis

Note, plates are keyed to brackets and chassis to ensure proper installation of correct components.  Do not force anything together where keying does not align.

Note, fittings can be very tight once snapped together; trying to disassemble may damage parts.  Reprint any damaged parts as necessary.

• Sway Arm Single-Mount Bracket Assembly

  • Snap in Top and Bottom Blank Plates onto Sway Arm Single-Mount Bracket:

  

• Sway Arm Dual-Mount Bracket Assembly

  • Snap in additional Top and Bottom Blank Plates onto right side Sway Arm Dual-Mount Bracket and snap in Top and Bottom Sway Arm Plates onto left side Sway Arm Dual-Mount Bracket:

  

• Chain Link Assembly

  • Snap in Top and Bottom Chain Link Plates onto each (except one, if using No Nextruder option) Chain Link Chassis:

  

  • Connect all Chain Links Assemblies together:

  
  

• Chain Link Assembly with TPU Bumper (Optional)

  • Attach TPU Bumper to any Chain Link Assembly that may contact CORE One walls:

  

  Tip, if you don't have TPU, once the cable chain is installed in the printer, wrap Nextruder Cable Chain with the original Nextruder cable Velcro straps, soft side out, at positions where Nextruder Cable Chain contacts the CORE One's walls.

• No Nextruder Chain Link Assembly (Optional)

  • If using the no Nextruder Mount modification, snap in Top and Bottom No Nextruder Plates onto one Chain Link Chassis:

  

  • Connect No Nextruder Chain Link Assembly to between 3-5 other Chain Link Assemblies:

  

• Nextruder Mount Assembly:

  • If you are using the Nextruder Mount, snap in Top Nextruder Plates onto Nextruder Mount Chassis, and the Bottom Nextruder Plates will slide in from the side:

  

2) Attach to printer

• Sway Arm Single-Mount Bracket

  • Snap in Sway Arm Single-Mount Bracket Assembly to right notch of sway arm:

  

  • Insert Nextruder cable inside bracket:

  

  • Connect Cable Chain Clip to secure cable inside bracket:

  

• Sway Arm Dual-Mount Bracket

  • Snap Sway Arm Dual-Mount Bracket Assembly to left side of sway arm:

  

  • Insert Nextruder cable inside brackets:

  

  • Connect two Cable Chain Clips PTFEs (or Cable Chain Clips if there is not a side spool feed PTFE tube) to secure cable inside bracket:

  

• No Nextruder Mount (Optional)

  • If using the No Nextruder Mount option, connect the No Nextruder Chain Link Assembly to the Dual-Mount Bracket Assembly:

  

  Note the use of Chain Link Assemblies with TPU Bumper inserts.

  • Insert Nextruder cable inside Chain Link Chassis assemblies:

  

  • Connect Cable Chain Clips PTFEs (or Cable Chain Clips if there is not a side spool feed PTFE tube) to secure cable inside chassis:

  

  • If there is a side spool feed PTFE tube, snap it in the Cable Chain Clips PTFE mounts:

  

• Nextruder Mount

  • If you are using the Nextruder mount, slide the Nextruder Mount Assembly on to the Nextruder at the cable port:

  

  • Connect the Nextruder Mount Clip to the Nextruder Mount Assembly:

  

• Cable Chain

  • Connect the connected Cable Chain Assemblies to the Dual-Mount Bracket Assembly and to the Nextruder Mount Assembly:

  

  Note the use of Chain Link Assemblies with TPU Bumper inserts in the first six Chain Link Assemblies closest to the Dual-Mount Bracket Assembly.

  • Insert Nextruder cable into the cable chain:

  

  Note, if slack needs to be adjusted (more or less) in the Nextruder cable, you may have to loosen the main-cable-clip behind the Y motor.  Additional detail can be found here: 6. Nextruder assembly | Prusa Knowledge Base

  • If there is a side spool feed PTFE tube, connect eight Cable Chain Clips PTFEs on the side closest to the Dual-Mount Bracket Assembly and four Cable Chain Clips on the side closest to the Nextruder Mount Assembly.  If there is not side spool feed PTFE tube, use 12 Cable Chain Clips.

  

  • Snap it in the Cable Chain Clips PTFE mounts:

  

Other Installation Variations with MMU3

Adjust links, plate, and clip types and count as necessary.

MMU3 With (inactive) Side Spool Feed PTFE Tube

•   Uses:

  • 1 Nextruder Mount Clip PTFE - on Nextruder Mount Assembly

  • 1 Cable Chain Clip - on Sway Arm Single-Mount Bracket

  • 14 Cable Chain Clip PTFEs - on remaining chassis and brackets

MMU3 With (inactive) Side Spool Feed PTFE Tube, No Nextruder Mount Modification

•   Uses:

  • 1 Prusa PTFE_CLIP

  • 1 Cable Chain Clip - on Sway Arm Single-Mount Bracket

  • Cable Chain Clip PTFEs - on remaining chassis and brackets

MMU3 Without Side Spool Feed PTFE Tube

•   Uses:

  • 1 Nextruder Mount Clip - on Nextruder Mount Assembly

  • 15 Cable Chain Clips- on remaining chassis and brackets

MMU3 Without Side Spool Feed PTFE Tube, No Nextruder Mount Modification

•   Uses:

  • Cable Chain Clips- on all chassis and brackets