Y mirror

[Anton vK]

Hi,

After a step by step measurement and improvement I can now reliably print (no heater blockage nor zenwheel issues). However I have a mirrored print result when I print the z-stabilizer. 

I'm using the Reptier-host 0.56 on a mac. The object looks correct in the host sw however with the o,o position at the left front while the makibox has it left back. This explains to me the mirroring of the printed object, but I do not understand why others didn't ran into that. When printing a symmetrical object it doesn't matter, but for this object it does  

To get my printer stable I first measured what current I could put into the extruder motor before it would make holes in the filament and in general it would eat the filament with higher currents immediately and even 800 mA would eat the filament when tried many times. Further I saw that sometimes with retraction the filament could not be pushed in (end connection of the tube and filament higher up above the screw that tightens the heater lower part.

Based upon that I changed the threaded pipe to have a heatbreak just above the screw of 3,5 mm high so that the wall thickness became 0.3 mm and I mounted 4 copper fins and detached the aluminium plate with 2 washers so it could have some heat exchange above the plate as well. Manual test should me that I neede less force to push the filament through and that the melt zone of the retracted filament was less than before. To assure maximum grip through the zenwheel I made sure it was round and that it would move smoothly also when tightening the motor screws, after that I made a v groove over the full length and placed a small rubber ring (cut from a bike tire) around the zenwheel so it always pushes the filament completely to the motor wheel. Further I limited the the extruder motor to 1200 mA. with that setting I have printed about 6 hours without any hick-up as long as I did not use the direct communication, but put the file as autprint.gcode on the SD card. The remote printing failed but never by blocking or eating the filament and i could always reprint the file from the SD card. The extruder motor is certainly less than 40 C.

So what how can I get the components printed without an mirror around the y-axis.

Thanks in advance.

- Anton    

[Neal D Corbett]

You could try swapping the X/Y connectors around - I suspect that swapped axes might cause mirroring?

FYI, the short axis is X, and the long one is Y:
I got them the wrong way around when I initially put my box together, because I expected X to be parallel to the front :P

Neal

[Anton vK]

Hi Neal,

Yes you are right, I made the same assumption. It it fixed now. Thanks, also for the others that responded.

- Anton

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