Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!
by BenJackson, published
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This is a semi-automated implementation of http://blog.makerbot.com/2010/12/22/calculating-your-feedrate-to-get-awesome-prints/ . It homes the machine, centers the nozzle about 100mm over the build platform, warms up the nozzle and extrudes plastic for a while.
There are integrated prompts to explain the process. Due to a bug (or missing feature) in ReplicatorG documented at http://replicatorg.lighthouseapp.com/projects/66325/tickets/11-gcode-m6-pauses-firmware-but-not-replicatorg , the M1 prompts which should help the user along all come out together. Meanwhile the makerbot keeps running, paused at the M6 T0 (tool warmup). Since the M1 pause for the user to time the plastic strings does not work, there is a fixed pause (based on my own experience).
This script could be further enhanced to extrude (say for 8 seconds), then stop, wipe (on the integrated ABP wiper) reposition and repeat. However, it's probably best to be measuring steady-state extrusion, so that may be overkill.
Save the script in replicatorg-0023/scripts/calibration/Plastruder calibration.gcode. When you restart ReplicatorG it will show up under File|Scripts|calibration. Click "build" and follow the prompts.
See above for discussion of a ReplicatorG bug which makes the prompts confusing.
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Plastruder Calibration by BenJackson is licensed under the Creative Commons - Attribution - Share Alike license.
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