Upgraded to 2.7 and now it moves real slow

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22 Mar 2015 06:05 #57079 by yoshimitsuspeed
Where do I change reset time? I did a quick search and couldn't find anything on it.

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22 Mar 2015 06:07 #57080 by PCW
change this
setp parport.0.reset-time 5000
to this
setp parport.0.reset-time 7500

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22 Mar 2015 06:35 #57081 by yoshimitsuspeed
Thanks I will try this and report back.

Is there any downside to having this number higher or any benefit in trying to keep it as low as possible?
For example if 7500 works well should I try 6000 to see if that works?
Or does it not really matter?

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22 Mar 2015 06:41 #57082 by PCW
It wastes CPU time if longer than needed,

The CPU (or a CPU on a multicore machine) is in a busy loop during the reset time

Do you have the drives timing specifications? thats the correct way to set the values

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22 Mar 2015 09:16 #57085 by yoshimitsuspeed
Not off hand. I might be able to find it.
This is the kit I'm running on.
www.automationtechnologiesinc.com/produc...-motors-4-axis-kit-3
Here is a pdf I just found on it but I don't see anything about timing. Don't exactly know what I'm looking for though.


www.google.com/url?sa=t&rct=j&q=&esrc=s&...528373,d.aWw&cad=rja

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22 Mar 2015 21:12 #57089 by andypugh

www.google.com/url?sa=t&rct=j&q=&esrc=s&...528373,d.aWw&cad=rja


That says 1.2uS (1200nS). Do you have a Break-out-board? Those often add extra timing constraints.

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22 Mar 2015 21:13 #57090 by PCW
Timing is specified in the PDF

Steptime 1.2 usec
direction setup and hold 5 usec

Do you have a breakout board between the Parallel port and the drives?
(this will also affect timing)

How are the drives wired to the parallel port/breakout?
(this will determine polarity settings in HAL)

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23 Mar 2015 03:19 #57091 by yoshimitsuspeed
I tried increasing that timing gradually up to 25000 with no change.
Then I went back and created a new config in stepconf and now it works.
The machine has done a couple big updates since the last time I tried making a new config so maybe the fix was in one of those?

Fortunately my config is pretty simple. I just need to enter my backlash again and I should be good to go.
I tested it out on a piece of wood and I am stoked with the speed upgrades. There is a massive improvement over 2.5.
Thanks for the help and input guys.
If you would like any additional info for debugging or anything let me know. My old config still has the problem but I don't know how much that concerns you.

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