DoESLiverpool / Tosca

Machinekit-powered polargraph drawing robot
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Establish a protocol for working out speeds and corner rounding parameters #15

Open goatchurchprime opened 8 years ago

goatchurchprime commented 8 years ago

When you actually play a toolpath you find that it rounds off the corners to keep up the speed:

The parameters for controlling this are given in: http://machinekit-docs.readthedocs.org/en/latest/src/common/User_Concepts/

In particular G64P0.5 means we will follow the path to a tolerance of 0.5mm and keep up the speed as much as possible as we go along.

machinekitcorners

We'll need a test example (G-code file) to run against that we use to tune the cornering rate and feedrate in order to get the fastest plot for the minimal degradation in cornering capability.

Maybe it will require 2 files with 2 different fonts in them that to show off the difference in speed if the letters are rounded vs with all sorts of corners and serifs.

Also might want a font that isn't outlines, to make the writing of letters twice as fast

goatchurchprime commented 8 years ago

The setup protocol also needed to establish the Z-height for pushing the pen in and out. There's a home button on the base jeenode that sets to the middle of the travel range.