Had anyone tried to installed E3D v6 Hotends? So far I've had no success. They are a bit too large
I installed one about two months ago. It works great. I had to superglue a washer on the top to take up some slack in the circular mount hole. I also had to make a new, slightly thicker wooden shim to account for a larger mounting gap on the E3D. Plus, the whole thing is a bit longer than the stock GMAX hot-end. This makes the fan shroud too short. These issues are the same as those detailed in Don Hanson's post about his E3D v5 upgrade. His pictures do a great job of documenting the process. Instead of doing it the right way and printing out a new fan shroud, I duct taped the existing shroud to the bottom of the mount platform. I also taped in some thin plastic on the top to cover up the air gaps this reconfiguration created. The first time I put the E3D on in it didn't fit at all, but then I realized that I screwed in the heating shaft upside down. A quick look at the diagrams on the ED3 website will confirm that you've assembled it correctly. The only way I could get the unit to fit was to position the fan assembly on the left side. Otherwise there's just no room.
Between the irregular glass I have for a bed (see photos in another post), the duct taped fan shroud and my oddly colored printer parts (I reprinted several warped PLA parts with leftover ABS) I've got the ugliest GMAX out there. But the E3D v6 has been a fantastic upgrade. Before installing it I could barely get through a print without a clog. Now I start the print and walk away until it is done. I never have a problem.
I bought the hardware and printed out the parts for a dual-extruder upgrade. My GMAX has the old twin rods for the X axis so the upgrade involves a lot of work. My old extruder is just sitting around so I thought I would use it for the second extruder. But I like the E3D v6 so much I think I'll just fork out the extra cash to get a second one. Plus, that way both heads will be the same height.
In short, the E3D v6 does work but you've got to mess with it a bit.
One last note, I bored out the filament hole on the extruder mount and ran the poly tubing all the way up to the top. I did this because I was having trouble aligning the extruder hole with the mount hole. Sometimes when feeding filament it would get stuck on the ridge created by this misalignment. Now it slides from entrance hole down to hot-end smoothly.