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robogrobo

Too high extrusion values in .gcode

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Hi there

I'm using the Netfabb 4.9 on OS X Lion (I know, i shouldn't) with Paul's profiles (thank you). But I want to try it as a slicer and then pass it to Cura.

Calculating toolpath, save as .gcode works without troubles. The problem is while printing, the extrusion values are too high! The extrusion stepper motor turns like crazy and of course it can't carry the filament.

When I slice it with SkeinPyPy everything is ok and the values for the extruder look like that:

E0.2... E0.3... E0.4

compared to the values generated from Netfabb: E1.2... E30.2... E50.44... E80.12

Any suggestion?

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That's normal really. The SkeinPyPy (Cura) uses a new method called "volumetric", which means the E values represent the length of the filament.

The old way (Netfabb, RepG25/26) is to have the E value represent the amount of filament coming out of the nozzle. Which is much harder to calibrate. For the Netfabb code to work with the new Marlin you need to add an M92 E14 to the start code:

viewtopic.php?f=9&t=479&p=2385&hilit=M92+E14#p2385

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