> -----Original Message-----
> From: Viesturs Lācis [mailto:[email protected]]
> Sent: den 6 februari 2012 20:40
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] AXIS default jog speed on A-axis
> 
> 2012. gada 6. februāris 21:15 Lars Andersson <[email protected]>
> rakstīja:
> >
> > How can I make [AXIS_3] linear?
> 
> [AXIS_3]
> TYPE = LINEAR

Tried that, no appearent effect.

> It just does not make sense to me to treat extruder as another axis,
> whose velocity would determine the amount of extruded material,
> because the machine is going to move the extruder along its
> coordinates at a given velocity, determined by F word in g-code. I do
> not see a way to control the velocity for A separately from XYZ.

I am now at the point of making almost acceptable prints, so knowledge is 
accumulating fast!

My idea and goal is that the A axis controlling the extruder should run at a 
rate proportional to the absolute speed of the print nozzle over the workpiece.

Simplified example: 

G0 X0 Y0 Z0
G92 A0   
F200
G1 X100 A100 
G1 Y100 A200 
G1 X0 Y0 A341
...
  
This will put down an even amount of material along the path regardless of F 
speed and also handle deceleration at the corners if I am at all lucky in my 
thinking. The progressive A values are computed automatically by the slicer 
program.


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