#Sanladerer #video on why #3D-printing still uses stepper #motors #toread
on 02025-11-11#manufacturing #3D-printing #video by #Sanladerer on including formable ribs or ridges running the length of 3-D printed plastic holes as “self-forming threads” to allow M3 machine screws to reliably form threads in them, contrasting with other options like heat-set inserts, “prong nuts”, and inserted hex or square nuts.
on 02025-06-16#Sanladerer Peopoly Magneto X printer #3D-printing #video It uses linear motors with closed-loop feedback (from a magnetic-strip DRO) for the X and Y axes, though still using leadscrews for Z (four of them, on steppers, moving the bed; the independent steppers allow it to do auto-bed-leveling using something like a load cell in the toolhead). It is large and heavy. The main controller is a Pi Zero2-1GB (which you can see booting Linux on the 7-inch micro-HDMI touchscreen), and then Klipper Adapter V1.0 I guess for the real-time electronics, and an ESP32 board that talks to the motor drivers over RS-485. The main motor control board is Bigtreetech Octopus Pro, which drives a couple of custom boards with big MOSFETs for the linear brushless motor drivers. He had to do some minor repairs with his lathe to get the bed leveling to complete. It did 64-point “mesh bed leveling” for bed height compensation, which found errors from -0.15mm to +0.11mm. The printhead has two fans blowing onto the workpiece through shrouds on opposite sides and another larger fan blowing air through the heatsink in the cold zone of the extruder. He crashed the extruder into the print bed, damaging the printer, wishing for “software endstops”. He had some problems with extruder flow control and underextrusion, while top solid surfaces were overextruded.
on 02024-04-05