Hi ! Long time I did not post anything on my custom 3D Printer. I still have a bunch of parts stuck somewhere in the world.
Hopefully, I received recently improved belts made of PU and 6 steel wires.
So I took some time to improve the parts of the Gantry. I think those are on the final stage.
Design changes
I changed the belt path to use a blocker with a M3 screw + nut.
There is a small 6mm * 6mm * 6mm pocket for the M3 nut with the needed hole.
Also, I made the design a bit more compact I reduced the height from 15mm to 10mm for each part. It is faster to print.
Slicing changes
I increased the Z Top/Bottom Shell to 1mm instead of 0.8mm.
Only 2 perimeters with 0.4mm extrusion width.
For the small part I am using a ZigZag or Linear Infill with 30%.
I print with no cooling fan at 0.2 mm layer height with a very low speed:
- 30mm/s to 20mm/s for Insets
- 30mm/s for Top/Bottom
- 40mm/s for Infill
Strong Hex Infill
For the biggest parts, I am using now the "Strong Hexagon" infill of my slicer with 30% and I am super happy with the stiffness to weight ratio. I do not have the proper tool to measure but it feels plenty strong.
This Strong Hex infill is different than an Hex.
An Hex infill looks like this:
The Strong Hex looks like that (same density as the previous Hex):
It is basically increasing the size of the Hex pattern, but instead of having only one line, you have two lines: increasing the width.
The part is quiet stiff which is nice because PETG is not a terrible material for this specific parameter.
Forthcoming parts
I found another source of issues on my Z Axis, the Bed support was bending a bit and causing alignment issues.
I am reimplementing it fully, I validated a few thing, but I have to design and to print the new supports before moving on. Using 8mm long unsupported rods is not the best decision I made... I need to think a bit more on how to reduce to the minimum any potential source of bending those guys.
Previous Parts
- https://steemit.com/technology/@boucaron/why-building-yet-another-3d-printer-part-1
- https://steemit.com/technology/@boucaron/why-building-yet-another-3d-printer-part-2
- https://steemit.com/technology/@boucaron/why-building-yet-another-3d-printer-part-3
- https://steemit.com/technology/@boucaron/why-building-yet-another-3d-printer-part-4
- https://steemit.com/technology/@boucaron/the-hotend-head-3dprinter-part-5
- https://steemit.com/technology/@boucaron/xy-stepper-motor-supports-3dprinter-part-6
- https://steemit.com/technology/@boucaron/z-stepper-motor-supports-3dprinter-part-7
- https://steemit.com/technology/@boucaron/test-assembly-3d-printer-part-8
- https://steemit.com/technology/@boucaron/lcd-support-3d-printer-part-9
- https://steemit.com/technology/@boucaron/x-y-optical-end-stops-3d-printer-part-10
- https://steemit.com/technology/@boucaron/small-heat-bed-assembly-3d-printer-part-11
- https://steemit.com/technology/@boucaron/power-supply-unit-holder-3d-printer-part-12
- https://steemit.com/technology/@boucaron/cable-management-for-the-hot-end-head-3d-printer-part-13
- https://steemit.com/technology/@boucaron/firmware-first-heat-first-moves-xy-gantry-alignment-3d-printer-part-14
- https://steemit.com/printing3d/@boucaron/induction-probe-on-the-z-axis-aluminium-brackets-3d-printer-part-15
- https://steemit.com/printing3d/@boucaron/failure-with-adjustment-tolerance-and-the-need-to-re-designing-few-parts-3d-printer-part-16
- https://steemit.com/printing3d/@boucaron/tb6600-stepper-drivers-support-quick-test-of-drivers-3d-printer-part-17