This is a first prototype derivation of my Ohmstruder modified to use a NEMA17 5:1 planetary gearhead stepper motor. This is the beginning of the initial calibration print to find the correct steps/mm using a calibration object. The object I use is a bearing holder that is printed in two halves that fit together with tight tolerance. When the halves are loose, more extrusion is needed. Calibration is perfect when the halves snap together easily but tightly. I’m printing this initial calibration test at 0.1mm layer height.
This is a demonstration of how I apply PVA glue to my glass print surface on my Reprap MendelMax 3D printer for printing with PLA filament. I can print PLA on bare glass for many objects, but for ones that are prone to lifting from the glass I use a coating of PVA glue which completely eliminates any first layer adhesion problems for me. I use a 1:10 dilute solution of PVA glue and water applied to the heated glass so the water evaporates quickly and I can control the thickness of the coating I apply. I can usually go for several prints without reapplying, depending on what I print. I usually set the bed temperature to between 50C and 60C for the entire PLA print and use fans on the nozzle and also across the build area.
Second timelapse test with better camera position and lighting. I may work on doing without the flash to avoid the flickering effect. This is another vase, printed at 0.075mm layers in amber PLA, total time was about 7 hours.