On Thu, 12 Jun 2014, Rene Hopf wrote:
Date: Thu, 12 Jun 2014 12:31:22 +0200
From: Rene Hopf <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: "Enhanced Machine Controller (EMC)" <[email protected]>
Subject: [Emc-users] Mesa 5I25 Stepping when linuxcnc is not running
Hi,
Today I converted a mill form parport to 5I25, using 5i25_r990x2.bit bitfile.
Everything was running good. Having a mesa card, I wanter to increase the speed.
When I closed linuxcnc, X and Y ran into the endstops at full speed.
Thinking of watchdog problems, I removed the pet function from the servo thread.
The hal pin indicates the watchdog has bitten, and I get no steps.
But when I exit linuxcnc I get steps in X and Y.
Rebooting shows that the steps are generated as soon as I press the power
button, and do not stop until I start Linuxcnc.
I already tried reflashing the bitfile.
As far as I can see the watchdog should bite when linuxcnc is not running,
switching outputs to high impedance.
The drives are connected via 330R and an 6N137.
http://www.uhu-servo.de/UHU_PCB_3_13.pdf
There is no way they can move on high impedance input.
They stop moving when I pull the cable from the mesa card.
The same setup rund without problems using the parport, apart from a few steps
generated during bootup.
I have another mill with a similar setup, but with a chargepump.
A chargepump will fix this, but anyway, the mesa card must not output steps
when Linuxcnc is not running…
Rene
The 5I25 will _not_ output steps when linuxcnc does not command them.
I suspect you have an interface problem of some kind. This will probably have
to be resolved with a voltmeter or scope.
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------------------------------------------------------------------------------
HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions
Find What Matters Most in Your Big Data with HPCC Systems
Open Source. Fast. Scalable. Simple. Ideal for Dirty Data.
Leverages Graph Analysis for Fast Processing & Easy Data Exploration
http://p.sf.net/sfu/hpccsystems
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