I don't agree in a CoreXY at 45/135 only one motor is working. Yes, only 1 is rotating. However there is equilibrium. One motor spins while the other brakes, or in other words, one accelerates while the other decelerates. The torques are still added, and neither is zero. Do agree is that the X-carriage mass is less than the Y-gantry with a X-carriage, so therefore will their accelerations. Coreby prot0typ1cal - CoreXY Machines
RodF, Not sure why you placed the limit switch for the Y on the gantry. Doesn't this require an extra cable carrier? I agree the screws need float supports on the top, maybe bolted on the underside of the top alum extrusion? Heck, there just a block with a bearing to keep the screw centered, cheesy. Problem with unsupported screws is they tend to whip, centrifugal force is easy to under estimatby prot0typ1cal - CoreXY Machines
QuoteOrigamib It seems to me that you could use one less motor to control 2 heads independently, whilst still controlling XY. Check out the CorEXY for ideas. I think you could easily use a similar belt run to control the 2nd tool. Other than that, I am loving your machine. Linear rail and ballscrews in all the right places Thanks for the praise The "E" on the CoreEXY looks ineffectual as it'by prot0typ1cal - CoreXY Machines
That makes sense, assigning U as the second X. You just invented CoreXYU !!! See why you choose Y1 and Y2, rather than Y and V, as V would imply independent movement, Y1 and Y2 infers commonality, as used in multiple Z motor configs. Have the RADDS with the extension board, for a total of 8 steppers. Planning to connect the extruders to the extension and use the main board for CoreXYU. Thereforeby prot0typ1cal - CoreXY Machines
Re wheel mounting. Perhaps some carriage bolts with the nuts inwards? Yea, you'll need to make the outer holes square :p Wow, 750W heater! You'll be able to bake cookies between printsby prot0typ1cal - CoreXY Machines
Looks stout If you're paneling the sides (clear), inside corner braces are kinda moot. Except where your door will be, then you'll probably still have short panels above and below for a seal interface. May be even an over and under cabinet arrangement, so you can access the top without opening the build chamber? Heaters at the bottom, vents on the top is the way most industrial printers are doneby prot0typ1cal - CoreXY Machines
Appreciate your offer on firmware. Absolutely accept. Regarding 4 degrees of freedom, in a CoreXY both motors control the Y. In my case 4. As I understand it, there is no degrees of freedom in a CoreXY, adding another head should make very little change in the kinematics. Mathimatically it will be like running two CoreXY simutaneously, only they will both have the same Y targets all the time. Oby prot0typ1cal - CoreXY Machines
Thanks for the interest dc42, X-Carriages move independently, though obviously share the Y-Gantry. Each Carriage is belted to two motors to operate in a CoreXY fashion. Total of 4 motors. Correct Widespreaddeadhead, only the lower run, right head, is belted ATM so it will work in the standard CoreXY config for testing. Will need to develop software to implement the left head. Both CoreXY runsby prot0typ1cal - CoreXY Machines
Hi. Seeked out this forum to help with my first 3d printer design. Hlidskjalf is a dual CoreXY 3d printer with CNC capabilities: The print heads are twin Toranado extruders: Some info: 24VDC 1000W PSU .5 N-m steppers belted 2:1 MGN12 linear guides with H blocks 1605 anti-backlash ball screws RADDSv1.5, RAPS128, Arduino Due with 7" Panel Due Soon to begin wiring and testing with a single headby prot0typ1cal - CoreXY Machines