Mendel Multiple Extruder
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Release status: Super Experimental!
| Description | This is a new carriage and extruder setup for Mendel, capable of holding up to three paste or bowden extruders
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This setup is extremely experimental and work in progress.
The latest files may be found here.
| FILE ID# | TYPE | DESCRIPTION | AVAILABLE FORMATS | CREATED/RESERVED BY |
|---|---|---|---|---|
| Your-File-Name | SOLID MODEL ASSEMBLY | These are CAD files for the Solid Model Assembly | .xml.zip, .stl.zip | --Example User 12:00, Today's Date 20xx (UTC) |
| Your-File-Name | CAD FILES FOR PARTS | These are CAD files for each part. | .xml.zip, .stl.zip | --Example User 12:00, Today's Date 20xx (UTC) |
| Your-File-Name | EVEN MORE FILES | These are are even more files. | .xml.zip, .stl.zip | --Example User 12:00, Today's Date 20xx (UTC)|- |
| Your-File-Name | SOLID MODEL ASSEMBLY | This is the final finished machine | N/A | --Example User 12:00, Tomorrow's Date, 20xx (UTC) |
Please edit this to put in your own files! --Sebastien Bailard 08:34, 10 September 2010 (UTC)
It is still the intention to get a RepRap working with an automatic changer. This is an intermediate step. In essence this a heavily modified version of the standard mendel carriage to give much more working volume within the carriage. This may be useful for many things, but in this case it is coupled with a mounting plate capable of holding three bowden extruders or 10cc syringes to use with a paste extruder. However, some accuracy is lost when using a bowden plastic extruder. Whilst this is ok for reproducing most parts in the Mendel design, I (Rhys Jones) have been unable to produce some of the finest parts to my liking (Such as the gears)
Within the mounting plate, there are three captive nuts that surround each extruder. This is to enable tach extruder to be easily bolted to the plate. However, crucially three compression springs are placed between the extruder brackets and the mounting plate itself. This is to allow to get the height of each extruder just right. It makes sense to only have height adjustment on the outer two extruders, and to treat the central extruder as the main one. This is because a) it saves springs:D, and b) the central extruder has the biggest build area and should be treated as your main one. Also by introducing springs, we've probably lost build quality a little, and thus this will produce the best results
Also, compared to the standard carriage, the belt travels through the carriage itself on the 360 bearing side, and thus the belt is clamped from the inside out.
To do / further improvements/:
1. At the moment, the opto flag attaches to the mounting plate (which it is occasionally necessary to remove). It would be much better if this could attach directly to the upper of the carriage. 2. The mounting plate could do with being stiffened a little. 3. It would be nice to get the carriage within 100x100mm for the Makerbot fans. 4. Would it be worth transitioning to thinner plastic filament? This would hopefully reclaim so of quality we've lost going to bowden, also we could use thinner PTFE tubing putting less force on the carriage as it travels (and thus making sure the nozzle position is more repeatable),
