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mrbeam / OctoPrint

The Mr Beam fork of OctoPrint provides a responsive web interface for controlling a laser cutter.
http://mr-beam.org
GNU Affero General Public License v3.0
15 stars 5 forks source link

manually filled areas have gaps #29

Closed mrbeam closed 9 years ago

mrbeam commented 9 years ago

ergebnis - svg

whatever may be the reason. First step: check gcode creation and repeatability.

ghost commented 9 years ago

lines It seems like it isn't skipping paths, but putting them at wrong places

only1pj commented 9 years ago

I used this cookie cutter method to generate a SVG and although it did run for a few hours, I knocked the material while it was burning so cancelled the job. I didnt have any issues with missing areas. That one in the ladt image looks quite bad.

hungerpirat commented 9 years ago

Did you check if your axes are loose or the timing belt has backlash? It looks like this happens if the axis orthogonal to the filling lines changes direction.

Can you confirm that?

On Thu, Jun 18, 2015 at 5:19 PM, Peter J notifications@github.com wrote:

I used this cookie cutter method to generate a SVG and although it did run for a few hours, I knocked the material while it was burning so cancelled the job. I didnt have any issues with missing areas. That one in the ladt image looks quite bad.

— Reply to this email directly or view it on GitHub https://github.com/mrbeam/OctoPrint/issues/29#issuecomment-113189950.

ghost commented 9 years ago

Indeed my axes were a bit loose and the timing belt was scratching at the plastic parts. Fixed this and tried to prnt again. It made some mistakes at the beginning, img_4228 but then printed everything where it belongs. img_4229 I'll run some more tests, but already consider my problem solved. So thanks for helping me!

mrbeam commented 9 years ago

You're welcome.

try to loosen the maden screws of the pulleys that they can freely spin over the motor shaft. Then move the gantry along the axes and try to feel if there is different friction in some areas. If yes, look at the rods , check the linear bearings and their seals, maybe put a drop oil on the rods. That should help.

2015-06-18 18:18 GMT+02:00 Dregbaer notifications@github.com:

Indeed my axes were a bit loose and the timing belt was scratching at the plastic parts. Fixed this and tried to prnt again. It made some mistakes at the beginning, [image: img_4228] https://cloud.githubusercontent.com/assets/12952717/8236111/68fb1fee-15e6-11e5-938c-782989cf8877.JPG but then printed everything where it belonges. [image: img_4229] https://cloud.githubusercontent.com/assets/12952717/8236119/7512ad06-15e6-11e5-8725-72bce9fb1b4a.JPG I'll run some more tests, but already consider my problem solved. So thanks for helping me!

— Reply to this email directly or view it on GitHub https://github.com/mrbeam/OctoPrint/issues/29#issuecomment-113206799.

mrbeam commented 9 years ago

another hint: linear bearings with dry running sealings cause quite some backlash which results in this effect. -> lubricate the rods.