Zesty Nimble for Anycubic I3 Mega

thingiverse

EDIT: 8/20/19 Final Edit After much trial and error, I've finally given up trying to get the Nimble to work with my Anycubic I3 Mega using a Trigorilla board. It's impossible to adjust micro-stepping without a hardwired connection between the stepper drivers and the board. Since these boards don't have jumpers, you'll need to find another way around it. I'm not interested in setting up UART communication protocol. I'll leave this design up for anyone else who wants to try their luck. If you download this, be aware that the part where the Nimble slides into needs to be lowered by about 1mm to fit properly. The fan is just slightly lower than the nozzle. EDIT: 8/13/19 After some tinkering, I've made a few changes to get things working with David Ramiro's firmware for the Anycubic I3 Mega 1.1.9 and TMC2208s installed in their original configuration. When I printed the holder for the nimble, I realized I'd need to mirror it or change the direction of the extruder so that I could have the Nimble on the right side facing forward. I've uploaded two versions of the same design - one with the extruder direction changed and one without. I also had to tweak the blower duct to get things working properly. I removed the middle part as it was too close to the hot end, and I think I need to make it a bit longer because the back hangs down. Right now, this is solved by using a zip tie. When printing the duct, I used tree support on the front end vertical to ensure there were no supports inside. I had to modify a mount for a titan clone to connect my existing extruder. If you don't have something like that, you may need to fabricate your own mount to hold the extruder and coupler in place. I'm still working on fine-tuning and calibrating things. Once I get it figured out, I'll post any changes to firmware and hardware. EDIT: 8/6/19 I've received my Nimble and I'm trying to make this design work. I've had to make some adjustments along the way, and I'll upload them if I succeed in getting everything working properly. I didn't realize I needed to adjust micro-steps when I started this project, and now I'm learning exactly how to do so. If you find a better way to make this design work, please let me know! Since I've used three different designs, I wasn't sure which one to remix, so I posted them all separately and referenced them below. I didn't create any of these from scratch - instead, I've modified each one as I was able to work with my machine. This is my attempt to get a Zesty Nimble working on my Anycubic I3 Mega. Right now, I'm using the X-carriage for the RJ4JP found here: https://www.thingiverse.com/thing:3092917. I'm also using the Nimble mount from here: https://www.thingiverse.com/thing:2594256, and the 5015 fan shroud found here: https://www.thingiverse.com/thing:3129964 so that I can use a 40mm black silent fan for cooling: https://www.thingiverse.com/thing:2748800. Mods to above: * Nothing's changed with the X-Carriage. * Nimble mount: I mirrored the part where the Nimble attaches to so I could mount it on my current X-Carriage. This meant adding three holes for screws, and I also added flanges on the bottom in an attempt to mount the fan shroud I modified for my model cooling fan shroud. I left the sensor port alone for now - I may or may not try using the cooling fan included in this design. * Fan shroud: I've tried setting it up so that it mounts on the bottom instead of the back of the X-carriage. My goal was to try and keep the X-carriage as is, at least for now. So far, everything dry-fits together okay. Now we just need to wait for the delivery of the Nimble and see how things go!