The stock TAZ is a very good machine. But I also enjoy modding, and improving things so I wanted to list what improvements I have done, or have planned so others can follow along, and perhaps work on them too. feel free to add suggestions and links to your mods too.
–get max rapid speeds, without lost steps. DONE. https://forum.lulzbot.com/t/left-z-axis-motor-spins-the-down-at-the-beginning-of-a-print/115/9
–add a second extruder. DONE. https://forum.lulzbot.com/t/dual-extruders-and-the-taz/91/1 and files here: https://forum.lulzbot.com/t/taz-dual-extruder-mod-files/142/1
–Stiffen the X-axis, and keep the X belt from popping off. DONE. https://forum.lulzbot.com/t/taz-stiffened-x-carriage-mount-pieces/149/1
–increase the X axis travel by moving the smooth rods out as much as possible. DONE. https://forum.lulzbot.com/t/taz-12mm-extra-x-axis-travel-parts/150/1
–Stiffen the Z axis to remove as much backlash and hysteresis as possible. DONE. http://www.thingiverse.com/thing:117950
–Add automatic bed-probing and compensation so I never have to level the bed again. DONE. https://forum.lulzbot.com/t/auto-bed-probing-and-compensation-with-g29-development/162/1 Files here: http://www.thingiverse.com/thing:117957
–Replace all IGUS bushings to ball bearings for more accuracy. DONE. buy and install LM10UU bearings
–Make a simple enclosure to trap the heat and help prevent parts from cracking. DONE. https://forum.lulzbot.com/t/hope-you-kept-your-taz-box-simple-heated-enclosure/170/1
–Anti-slip Y belt mount. NEARLY DONE http://forum.lulzbot.com/viewtopic.php?f=16&t=213 .
FUTURE PLANNED MODS:
–Simple spacers for the extruded aluminum to increase the X and Y travel 12mm. IDEA STAGE.
–A “cable chain” for the heated bed cables, so they do not rub on the other parts. IDEA STAGE, but something like this http://www.thingiverse.com/thing:23552
–add a place to mount a second spool of material, for the dual extrusion. IN PROCESS.
–add a loose coil holder, that fits the spool holders. IN PROCESS. based on this. http://www.thingiverse.com/thing:117627
–make a more permanent, and possibly heated chamber. IDEA STAGE, but something like this. https://forum.lulzbot.com/t/custom-taz-enclosure/172/1
–Print fan mount, that fits the dual extruders. IDEA STAGE.
–Corner supports that integrate storage for the common Allen wrenches, and knife and pliers. IDEA STAGE.
–possibly re-design the second extruder to be a bowden tube style, to reduce X carriage weight. IDEA STAGE, but similar to this http://www.thingiverse.com/thing:116880
–A mount for the power supply. IDEA STAGE
–Filament wiper and dump tank. IDEA STAGE, but something like this http://www.thingiverse.com/thing:28653
BTW, I will try to keep this thread as more of an organization and general idea scratchpad thread. I will make threads in the development area of this forum for each of the mods, and link them here, so the stock TAZ area of the forum is not filled with non stock stuff.
Some usefull links for Modding:
Lulzbot TAZ freecad development files area, where Lulzbot stores the files they are working on upgrading and modding: http://devel.lulzbot.com/TAZ/FreeCAD/
Lulzbot TAZ stock freecad parts file area. http://download.lulzbot.com/TAZ/hardware/printed_parts/FreeCAD/FCStd/
FreeCAD, so you can open and work on the above files http://www.freecadweb.org/