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Clank-CoreXY: Minimum Clank

This variant of Clank is pretty stable, and we have a handful of them kicking around the lab now (Feb 2023) w/o any major mechanical troubles.

CAD Access

I’m also throwing this embedded CAD right here. You can fullscreen this (it’s actually pretty performant) and even explode the model, inspect the part tree, and open it in your own instance of Fusion 360.

You can also download the CAD in a few different formats below. For the very-most-up-to-date, use the Fusion embed above, that changes in realtime.

Download Clank-CoreXY in .f3z Fusion 360

Download Clank-CoreXY in .step Interchange Format

Download Clank-CoreXY in .3dm Rhino

Clank-CoreXY on GitHub


I set up a few print plates, ~ 8 of them, check them out below; they’re sized for a Prusa 250x210mm bed.

Get Clank-CoreXY Printer Plates

I print each in PLA on generic FDM machines… check the printing notes in the parent build section.. Lately I’ve moved to a 0.6mm nozzle.


This is a brief ~ WIP bill of materials. Hardware is all sourced from this kit in the CBA basement, or your own shop’s hardware kit, or via McMaster - or wherever you find your hardware.

SHCS: Socket Head Cap Screws
FHCS: Flat Head Cap Screws
BHCS: Button Head Cap Screws 

I will also note that many of the fasteners here “tap” straight into FDM printed holes… i.e. the fastener does some thread-forming on the way in. I’ve found this to work really well, but I almost always do it with a hex bit in a drill driver, i.e. not ever by hand.

the bed is simply a 420x400mm 3/4” thick plate of melamine (or whatever plate material of your choosing) - easily cut on a table saw, a shopbot, etc; thickness is also easy to change

Part Name (CAD) Count Use / Description Availability
625 5x25x5mm Bearing 37 Linear Rollers and Pulley Idlers Amazon ~ $1 / bearing
6806 30x42x7mm Bearing 2 Z-Drive Reducer and Toolchanger Acutator Amazon (and ubiquitous: these are also “BB30” bicycle bottom bracket bearings)
MGN9 Block and Rail 2 Z-Axis Guides Amazon
MGN9 Extra Block 2 Z-Axis Guides Amazon
GT2 Pulley, 16T 3   Amazon
GT2 Belt, Open ~ 2 Meters 9mm widths are preferrable (stiffer) but 6mm are OK. Amazon
GT2 Belt, Closed, 200mm Circumference 1   Amazon
PP_SWTC_Optical-Endstop 3   Amazon
PP_FOOT_9377K523 4 Feet ! McMaster 9377K523
NEMA 17 Stepper Motors 3   Amazon
HFS5-2020-400-TPW Extrusion 2   Misumi (can be ordered cut-to-length)
HFS5-4060-354 Extrusion 1   Misumi (can be ordered cut-to-length)
Extrusion T-Nuts 6   Misumi “HNTAJ5-5”
HW_M3-Washer 6 M3 Washers  
HW_M3x8-SHCS 28 M3 Socket Head Cap Screw, 8mm Long  
HW_M3x10-FHCS 16 M3 Flat Head Cap Screw, 10mm Long  
HW_M5-Washer 23 M5 Washers  
M5 BHCS      
HW_M5x10-BHCS 5 M5 Button Head Cap Screw, 10mm Long  
M5 FHCS      
HW_M5x10-FHCS 17 M5 Flat Head Cap Screw, 10mm Long  
HW_M5x15-FHCS 12 M5 Flat Head Cap Screw, 15mm Long  
HW_M5x20-FHCS 3 M5 Flat Head Cap Screw, 20mm Long  
HW_M5x30-FHCS 17 M5 Flat Head Cap Screw, 30mm Long  
HW_M5x40-FHCS 14 M5 Flat Head Cap Screw, 40mm Long  
M5 SHCS      
HW_M5x14-SHCS 26 M5 Socket Head Cap Screw, 14mm Long  
HW_M5x25-SHCS 6 M5 Socket Head Cap Screw, 25mm Long  
Tool Use Availability
Drill Driver Thread Forming / Fastening  
Metric Allen Key Set Allen-Keying  
2.5mm Hex Bit Drives M3 SHCS  
3mm Hex Bit Drives M5 FHCS, BHCS  
4mm Hex Bit Drives M5 SHCS  

Build Videos

These are somewhat out-of-date, but only w/r/t incremental updates. They’ll still serve as a good guide for the general outline of the build process.