Thanks!

the drives are what is limiting..  They are 20a continuous and 40a 
peak.  The servos are pretty close to an amp per ft-lb.  with a 2:1 belt 
drive - that gives us 80ft-lb peak at the screws.   That is pretty close 
to what the old hydraulic servos.

sam

On 12/11/2010 08:38 PM, Jon Elson wrote:
> sam sokolik wrote:
>> had some time to do some tuning.  Getting there - I am pretty new to it.
>>
>> http://www.electronicsam.com/images/KandT/conversion/testing/tuning.png
>>
>> That is a .1 move at about 25ipm  - the peak at the begining and end are
>> the acc/decel.  it peaks at .00017.  It is a bit better than that - I
>> had to retune a little after I turned up the current limit on all the
>> amps to maximum. :)  I have the ferror set to .001 right now and did a
>> bit of machining with no issues.
>>
> Getting there?  I think you ARE there!  peak error below 2 tenths sounds
> very good to me.
>> sam
>>
>> ps - that should give us about 16000lbs peak and 8000lbs of force
>> continuous. :)
>>
> Yikes, those must be some BIG servos!  You want to be awfully careful
> about crashing a machine
> that can deliver that much linear force to things.
>
> Jon
>
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