AC-Bot Titan Carriage for D-Bot by Sparreau

Last crawled date: 3 years ago

What is it?
This is a d-bot carriage which supports a 12mm inductive proximity sensor, E3D Titan extruder, and either the v6 or volcano hotend. The main goal of the carriage is to avoid the tapered pads found on most other carriages which are used to tighten the v-wheels to the v-slot. In my experience, tapered pads make it difficult to achieve good tightness without over torquing the bolts and making the bearings not roll properly.
The carriage is designed for ease of assembly and installation. Rear belts are attached through slots and zip tied. The front of the carriage features tension adjusters which enable precise adjustment of belt tension in order to square the h-bar.
How does it work?
The top of the carriage has 4 M3 screws which tighten the upper mini v-wheel to the v-slot rail. Based on the mini v-wheel models provided by OpenBuilds there should be a gap of exactly 1mm between the front/rear and top when all wheels are touching the v-slot. For my machine the gap completely disappeared when the screws were tightened, however the tightness seems perfect. This might be due to printing tolerances or manufacturing tolerances for the extrusions and mini v-wheels.
Status
9/20/17: I haven't had a ton of time to work on this lately because of an upcoming move. The version that is posted now works fine, although the part cooling could be better. The carriage mechanism itself is (IMHO) a joy in comparison to the original. It is very simple to tighten the carriage so that the bearings roll perfectly.
If anyone has any ideas/suggestions/requests let me know.