> Date: Sat, 6 Jul 2013 13:23:15 -0500
> From: el...@pico-systems.com
> To: emc-developers@lists.sourceforge.net
> Subject: Re: [Emc-developers] "Open" Development
>
> EBo wrote:
> > Seriously though, we should
> > be able to merge Araisrobo's code and add spindle synchronized.
> >
> Well, it is pretty obvious to me that jerk limiting and having the Z axis
> follow the spindle are in conflict. So, I think the jerk limiting may need
> to be turned off when in a spindle-sync move. Generally, sane G33.1
> operations won't cause excessive jerk, so that probably is OK. One also
> may need to control the rate of spindle reversal, which you need to do
> anyway to allow Z to keep up.
>
> Jon
>
I am not an expert, just interested. I don't follow your reasoning.
Jerk limiting is about having the TP ask for movement that is possible
for the machine to actually produce.
infinite jerk is impossible for a machine to produce movement for.
While we can ignore it in relatively slow and small machines, I can not
see why you would want to turn it off in some cases.
It seems if you have the TP request infinite jerk, then you are must realize
that your are asking the machine to NOT follow the TP command for a small
instant.
I don't see how G33.1 is any different then other machine movements.
Chris M
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