Even with just two M4 bolts holding on my Greg’s accessible extruder I still find it a pain to swap-out extruders so I decided to re-design the X carriage to allow a quick extruder change and also make it big enough for Dual extrusion and mounting other things -
I’m not yet experienced with OpenSCAD so I used Sketchup for this design, if anyone apart from me finds the idea useful it would be great to do it as a parametric OpenSCAD model, I can already see a need for a LM10UU version.
I’m getting to grips with Sketchup now, you can do quite a lot with it.
Horizontal X design compatible spacing with Mendel, Prusa Mendel and MendelMAX
Use Linear bearings (LM8UU) and make them very easy to fit.
Quick-fit and removal of Extruders (And other devices… more on that shortly)
Maximum space for extruder/hot-ends/heat-sinks between the smooth X bars
Allow dual or more extruder’s to be fitted at once.
Allow for an easy extension of the X carriage (for future upgrades) – that needs some explanation, see below.
Printable on a Prusa, Huxley or TOM without support material.
This is my design for a ‘Quick-Fit’ clamp and expandable X-carriage -
It’s printed vertically in two parts, without the need for support material – bolted together.
A key feature about the design is that you can extend it, even when it’s fitted on the machine, you would unbolt the two halves and insert a printed spacer each side then bolt back together, allowing triple extruder’s to fit or something bigger…
4 linear bearings LM8UU are used and provide the widest space for extruder’s whilst keeping compatible with Mendel, Prusa, and MendelMax X bar spacing.
I know it looks big, but actually is only uses a little more length and when you have a normal Greg/Wade extruder fitted to any other X-carriage it usually overhangs by almost the same amount.
It uses a small Mendel style Bearing for the Quick-fit latch.
The latch is quite tall in this picture, it’s a little smaller now.
I have updated Greg’s Extruder to be Quick-Fit and defined the spacing for the standard carriage adapter plate to be 100mm wide.
It has an adjustable belt clamp.
This is an example adapter for a normal Wade/Greg extruder to turn it into a Quick-fit version.
Lower profile Catch
This shows a Dual extruder setup on the Quick-Fit adapter – using 2 x NEMA 14 (Huxley style) extruder’s side-by-side.
Here is a Short video showing fitting and removal of the Quick-Fit Extruder on a Quick-Fit X carriage.