On 01/26/2020 11:09 PM, John Dammeyer wrote:
Hi Jon,
-----Original Message-----
From: Jon Elson [mailto:el...@pico-systems.com]
Sent: January-26-20 6:14 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Real-time OS for machine controllers (Jon Elson)
On 01/26/2020 08:04 PM, John Dammeyer wrote:
I set my BBB aside when the Xylotex cape I had forced normally open limit
switches.
The limit switch polarity can be set in software. In the
configs file directory, in file
CRAMPS.hal there is this :
Unfortunately not. The signal was wired in hardware so the enable on the level
translation devices was shut off when the switch was closed to ground. So a NO
switch would close signalling not only a limit condition but also shutting off
all the drivers.
A NC switch would never allow step pulses out.
Well, clearly this is a design defect in the breakout board,
NOT a problem with LinuxCNC/Machinekit.
Also makes homing kind of funny.
Jon
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