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.
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.
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:
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.
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.
