Reptar XY! - Version Two

A simple, lightweight, easy to use, XY block

3D printer parts and enhancements

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XY blocks with integrated belt tensioners are cool. But after designing several of them and using them for months, I've come to the conclusion that they are actually an unnecessary convergence of features and a general pain to use. Rarely (*aka - never*) do I want to simultaneously tighten my belts, adjust my 6mm rods, and adjust my 8mm bushings... so having all of those features in the same part makes each one of those operations far more complicated than it needs to be.  
**Knowing that now,  I present the Reptar XY - *Version Two:*** a simple, lightweight, *easy to use* XY block. The 6mm rods snap in and are secured by 3 #2 x 0.5in plastite screws.  
Belt tensioning is achieved by using any of the external belt tensioners... or... even better... by switching to 303 tooth GT2 belts and doing away with belt tensioners entirely. The belt length on those is perfect without any additional tensioners, and has lasted 1000+print hours without needing adjustment.   
Belt indexing is easily achieved by marking the edges of the belt with white paint after assembly - meaning with these blocks, you will never have to adjust your pulleys again!



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Fabff6062280e985473430603d5a6555?default=blank&size=40pschne added this to the UMO collection ago
06007b2e23efab58165d7ab5cf7f12f3?default=blank&size=40Tobiasz Zysk added this to the UMO collection ago
Mini v2 1712e4f8eb53b02d7342262b2a32165a hdcnwlq added this to the 1 collection ago
96c2f4f604a3d3b0b968a9d52f46d57e?default=blank&size=40mbartell added this to the umo+ collection ago
915cad8e97fddc508157e276394e2568?default=blank&size=40michaelnoardo commented ago

HI Man, I really loved the concept and I want to use it in my own DIY printer, can you share more photos from the whole project? Do you have videos?

077e146d5f7d17eb409d591e11311bd6?default=blank&size=40Daniele Ribolla added this to the shotty's stuff collection ago
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Mini 636790 300Thomas Beck commented ago

Same question as Lyle LeBlanc ... where are the limit switch addons? Dd you forgot to include them? How did you solve it?

Mini 636790 300Thomas Beck added this to the UM Original updates collection ago
6687642de591015115e8d5c81f406768?default=blank&size=40Larsvstrom added this to the Ultimaker updates collection ago
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Mini monkeymeLyle LeBlanc commented ago

Hey! Thanks for the design! I've successfully printed and installed them only to realize I've completely forgotten about the limit switches. I see in one of the pictures that there's something that attaches to the back, but I cant seem to find the files anywhere. Before I go ahead and make something crude and utilitarian I was wondering if you actually already have a file for these? I tried to use the ones from your first version but there wasn't enough space between the frame of the machine and the xy block on the front of the machine to make it work. It is quite possible I'm doing something wrong though. Thoughts?


B6c4393e7cc17c631a0142e2bc4e4b2f?default=blank&size=40brycehewett added this to the Printer upgrades collection ago
Mini ataraxis glow bigataraxis commented ago

Plastite screws are designed for plastics. They are cutting their threads themself. I guess normal ones will do it.

Mini dandylion2Paul commented ago

What are plastite screws? Can you use normal screws instead. We don't have such a thing in the UK, I think the imperial dimensions don't help

Mini monkeymeLyle LeBlanc added this to the UMO+ collection ago
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A8a16e26c1f65566a29f2e552cd83b74?default=blank&size=40seansadler added this to the XY Bearing Block Designs collection ago
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Mini chrischris kearsley printed this ago
Carousel thumb 20150510 161045
Printed on:
prusa i3
mixed the main bodies came out brilliant but the clasp parts had to have support because the way i had to ave the part make sure the belt teeth was printed ok
Printed with Cura 35 mm/s 25% infill 0.3 layer height
2c881c106a4908a21ae5a5949b33efee?default=blank&size=40Raptor4 commented ago

Hi nhfoley!

Please upload an STEP file of Reptar XY-Version two! 

Would gladly use this blocks for my printer, but need it for 8mm gantry!

Hope, You can do it as soon as possible!

Thank You in advance!


2c881c106a4908a21ae5a5949b33efee?default=blank&size=40Raptor4 commented ago

Hi nhfoley!

Please upload an STEP file of Reptar XY-Version two! 

Would gladly use this blocks for my printer, but need it for 8mm gantry!

Hope, You can do it as soon as possible!

Thank You in advance!


4cde81b945234c97ea988dfb081ed3c0?default=blank&size=40Pierrick commented ago

I would like to create the same piece but for 15mm ball bearing. Could you tune you design or send my your CAD files?

Mini dsc06896 1nhfoley published this design ago