Ok, we'll look into trying the mux.  And when we are done moving the axis 
(without EMC worrying about ferror), can we then SET the commanded position to 
the new actual position so that when EMC takes back control it knows where it 
is?
-Tom

On Oct 27, 2011, at 8:28 PM, andy pugh wrote:

> On 28 October 2011 01:20, Tom Easterday <tom-...@bgp.nu> wrote:
>> Is there a command or parameter that can be set while EMC/Axis is running 
>> that will make it ignore following error (and then after issuing again - pay 
>> attention to ferror)?  I want to have my servo drive control an axis and I 
>> want EMC to ignore it while I do this, then take back over control.  But I 
>> don't want to have to disable Axis.
> 
> Disabling axis (the halui equivalent of F2) works, but as you don't
> want to do that…
> 
> You could latch the encoder feedback into a mux2. If you link the
> output to the input then it acts like a sample-hold block (there is a
> sample-hold, but that is s32 not float). If you wire the select pin to
> the homing pin, and the other input to the encoder position, you can
> freeze the feedback.
> 
> Probably.
> 
> -- 
> atp
> "Torque wrenches are for the obedience of fools and the guidance of wise men"
> 
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