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Centering target

by Thomllama, published

Centering target by Thomllama Aug 7, 2016
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Fusion 360

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Centering target by Thomllama is licensed under the Creative Commons - Attribution license.

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Summary

simple target designed to check the centering of the printer. Lines are 5mm apart.

Blog post to explain how to use this to get your printer to center all it's prints properly on the bed...

http://3dprintingllama.blogspot.com/2017/04/centering-on-your-bed.html

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I like the method of finding the bed center by drawing lines, but I have a quicker way which saves filament:

  • Preheat bed and extruder
  • G28 home
  • Manually move X and Y to the middle of the bed at Z0 height
  • Extrude 1mm of filament
  • Move Z up 10mm

If you don't already have boogers coming out, the extrude leaves a dot on the bed and you can measure from the dot to the center. There's no need to print a whole big target for it :)

Jun 24, 2017 - Modified Jun 24, 2017

This is probably a super noob question. But I'm trying to lay this flat in Cura and it puts it on an angle...? Can't seem to rotate it correctly as it's not at a 15 degree point. Any idea how to fix this? (I'll try another version of Cura and update)

::EDIT:: Used Slic3r and it was a lot easier to centre/rotate. :)

I Followed the guide, and after printing the target and measuring, I put the offsets into the appropriate places as shown but they don't seem to have any effect at all. Is there something else I'm missing?

did you save, complie and upload the Firmware? ;).

I did. Multiple tries with no errors. I took the measurements and plugged them into the gcode offsets for S3D as a temporary fix, but I'd prefer to figure out why the firmware fix didn't work.

well, I can't fix itwithout being there to see what you are doing, but it's likely something you're checking or un checking (backslashes) in the firmware. or how you are uploading? not doing the update trough like Cura or anything are you? using Adrenio? not just a text editor?

I'm using the arduino software to upload it. I feel like there's something commented or uncommented that's causing the issue which is why I asked, but so far I've only had time to take a cursory look at the file to see if I could spot anything that would affect it.

@Tornath - May not be your issue... but on my A8 I need to tell it the config has changed for some reason...

Send M502 to the printer to load the defaults of the latest uploaded Configuration.h and then do an M500 to store those settings to EEPROM. (M500 is only needed once your know the M502 worked, just to commit to "hardware" when rebooted.)

If you only change your min_positions, don't you just shrink down your area (and center the whole thing?)

Aug 27, 2016 - Modified Aug 27, 2016
Thomllama - in reply to Rasalas8910

Nope, don't believe so. the above 200 stays, it's just telling it to start at your min's But could always just raise the max to match if it does

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