Hi Everyone,
This is my design for a CoreXY machine. I'd like to print mechanical parts at high quality out of polycarbonate, delrin, abs and other "exotic" filaments. I've got a heated build chamber that it should fit inside. Travel moves of 200 mm/s, accelerations of 7500 mm/s^2 and print speeds up to 100mm/s would be my goal for speed. The math says this should be achievable but I'd be curious to hear what you all have to say. I've seen the parking extruders that use electromagnets to grab the carriages and I'd like to use something similar. The placement of the motors is a bit unconventional at the back but this because the heated chamber has room back there. Other design features are:
9mm kevlar core belts
DuetWifi Control Board
BLTouch Probe
Drive steppers are 17HS24-2104S and geared down 3:1
My big burning questions right now are:
Are the MGN12C adequate for the Y axis rails or should I go with the H?
Are the MGN12H on the X axis where the extruders mount overkill? Could I go down to MGN9 and save ~200 grams? Is this axis too heavy anyways?
Is it a good idea to constrain the top of the Z lead screws?
Things I think may need work:
Belt tensioning could be done by sliding the front pulleys back but this isn't the best system.
I wish there was better tooth engagement on the drive pulley, there is a snub pulley but it is not optimally placed, I think it will get 5-7 teeth.
I need to add fastners to the model.
I need to design the extruder mounts and parking system but I'm pretty sure I could build the frame without having that done.
Adjusting the pulleys to keep the belts parallel will probably involve rebuilding certain parts so I'd like to improve that too.
I've got a machine shop and a CNC plasma cutter at my disposal so whatever you think might improve the design I can probably build.
This is my design for a CoreXY machine. I'd like to print mechanical parts at high quality out of polycarbonate, delrin, abs and other "exotic" filaments. I've got a heated build chamber that it should fit inside. Travel moves of 200 mm/s, accelerations of 7500 mm/s^2 and print speeds up to 100mm/s would be my goal for speed. The math says this should be achievable but I'd be curious to hear what you all have to say. I've seen the parking extruders that use electromagnets to grab the carriages and I'd like to use something similar. The placement of the motors is a bit unconventional at the back but this because the heated chamber has room back there. Other design features are:
9mm kevlar core belts
DuetWifi Control Board
BLTouch Probe
Drive steppers are 17HS24-2104S and geared down 3:1
My big burning questions right now are:
Are the MGN12C adequate for the Y axis rails or should I go with the H?
Are the MGN12H on the X axis where the extruders mount overkill? Could I go down to MGN9 and save ~200 grams? Is this axis too heavy anyways?
Is it a good idea to constrain the top of the Z lead screws?
Things I think may need work:
Belt tensioning could be done by sliding the front pulleys back but this isn't the best system.
I wish there was better tooth engagement on the drive pulley, there is a snub pulley but it is not optimally placed, I think it will get 5-7 teeth.
I need to add fastners to the model.
I need to design the extruder mounts and parking system but I'm pretty sure I could build the frame without having that done.
Adjusting the pulleys to keep the belts parallel will probably involve rebuilding certain parts so I'd like to improve that too.
I've got a machine shop and a CNC plasma cutter at my disposal so whatever you think might improve the design I can probably build.