Re: [Emc-developers] Heater control

[EBo <eb...@sa...>]

On Aug 16 2013 3:51 PM, andy pugh wrote:
> On 16 August 2013 22:24, David Bagby <da...@ca...> 
> wrote:
>> I find myself thinking that this conversation is twisted by the
>> assumption that an extruder as an axis - I don't think it is.
>
> You are not wrong, but…
> The extrusion motor movement needs to be synched to motion. While XY
> are not up to speed, the extruder motor needs to run more slowly to
> maintain layer thickness.
> So, whilst it is not geometrically an axis, it is synched to motion
> like a axis.

this was my understanding/assumption all along.  So why do you consider 
treating it like an axis twisted?  It must be synchronized with the 
planar movement in the same way that a slow tool like a single point 
threading tool is fed through a piece.  It has to be fully coordinated 
to keep the volume consistently printed.