CNC Notcher: BikeCAD GCode Export
Brent is releasing version 21 of BikeCAD with the GCode Miter Export function that we collaborated on while I was building the CNC Tube Notcher. This allows you to export GCode in just a few clicks directly from BikeCAD. The time it now takes to go from a BikeCAD drawing to the actual mitered tubes is significantly reduced. I find this particularly useful for down tubes that connect to tapered headtubes or that require a lot of water bottle holes. In a couple of minutes you get a fully mitered downtube with a perfect fit at both ends and the holes drilled in all the right places and inline.
Some curious minds out there have asked me for some more details on the actual machine so here is a list of the main components I used and a video of the latest setup:
- The X and Z axis is provided by the Gantry of a CNC router made by Rat Rig in Portugal (StrongHold Pro)
- The gantry is coupled with a lathe like bench made of Alu profiles sourced from Alu Profil in Austria
- The Y axis is a made of two rotary chucks sourced from Vevor
- The Spindle and the Variable Frequency Drive inverter is also from Vevor
- To control the 4 step motors I used OpenBuilds BlackBox Motion Control System X32
- To send the GCode to the controller I used OpenBuilds Control Software
- To hold the tube on one end and keep the step motor coupled to the tube after the 1st cut, I mofified a Pipe/Tube Expander with an extended arbor
- To hold the tube in place on the other end during the 2nd cut, I modified a Pipe Cutter (replaced the cutter with a bearing: see video/pic below)
The main benefit of this setup is that it uses a carbide bit instead of say a laser or plasma and it let's you cut alu, steel, stainless and titanium without heating/altering the tube. The main limitation is that you can only cut straight and round tubes.
PS: Other pictures and videos of the setup are available here: https://www.otmbikes.com/wpblog/?s=cnc
Hyperion Ti Gravel Bike
Driss wanted to treat himself with a new bike for 2025, it's gonna be a gravel bike, it's gonna be 1x12 GRX and last but not least it's gonna be in Titanium, and not just any titanium, it's gonna be made from Columbus' new Hyperion tubeset with a Futura Gravel fork to match. The design drawings are ready, the parts and the tubes arrived: let's see if we can finish this bike in time for Christmas !
Driss a voulu se faire plaisir en s'offrant un nouveau vélo pour 2025, ca sera un gravel, avec un groupe GRX 1x12 et dernier détail (non des moindres): il sera en Titane, pas n'importe quel titane mais la nouvelle série de tubes Hyperion de chez Columbus marié a une fourche Futura Gravel, évidemment. Les plans sont finalisés, les composants et les tubes sont arrivés: voyons si on peut finir le tout pour Noël !
Autumn Blue(s)
Jean-Michel's new gravel / tourer / commuter/ bikepacker / semi-monster-crosser is ready. It's built with a GRX 810 2x11 groupset with 105 brifters for cable actuated hydraulic brakes (Juin Tech). The use of a GoatLink 11 with the standard GRX rear derailleur, allows for the use of MTB 11x50 cassette in a 1x configuration. Versatility is the "theme" on this bike. For info: the paint is powdercoat, the color is a classic RAL 5011 (steel blue).
Le nouveau vélo de Jean-Michel, un gravel / rando / velotaf / cross. Il est monté avec un groupe GRX 810 2x11 et des manettes 105 pour un freinage hydraulique activé par câble (Juin Tech). L'utilisation d'un GoatLink 11 avec le derailleur GRX standard permet le montage de cassette 11-50 en configuration 1x. La polyvalence est le maître-mot de ce vélo. Pour info: la peinture c'est du thermolaqué, la couleur du RAL 5011 (bleu acier).
