On 8/26/22 15:47, Peter C. Wallace wrote:
On Fri, 26 Aug 2022, gene heskett wrote:
Date: Fri, 26 Aug 2022 15:37:28 -0400
From: gene heskett <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: [email protected]
Subject: Re: [Emc-users] Z probe on 3d printer, marlin driver.
On 8/26/22 14:51, Chris Albertson wrote:
Yes, compile from source. That is the only way to chance Marlin'
config.
There is not config file that it reads.
NO and NC are the wrong way to think about these sensors. They are
NPN or
PNP transistors, not switches. The output signal is determined by
if the
signal is pulled up or pulled down by a resistor. They make both
npn and
pnp versions. Think of then as transistors and it will make sense
and read
the state at the junction of the resister and transistor.
You must recompile anyway to enable bed leveling with the sensor. The
firmware will measure the z-height of the bed in a grid pattern and
then
will know if the build plate is flat or leaning and will
compensate. You
can't turn this feature on and off unless it is enabled at compile
time.
You also need enough memory on the controller. Every feature you
enable
makes the firmware larger.
It is already configured to use a bltouch, I just need to invert the
logic.
I think. Then I read that the bltouch is a pulse output, and these
things
are dc. Maybe I need an rc circuit to make a short pulse?
Which polarity then is the Leading Edge? Rising or Falling?
Rated for 6 to 36 volts, under test at lowered voltage, they still work
down to around 4 volts but that is not enough to light the tally led,
but the output still switches.
Thanks Chris
Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law
respectable.
- Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/>
NC/NO and PNP/NPN are orthogonal so you can have
NC PNP
NC NPN
NO PNP
NO NPN
NC means the switch (or transistor) is closed (on) when not actuated
NO means the switch (or transistor) is closed (on) when actuated
PNP means a sourcing output (common is +V)
NPN means a sinking output (common is GND)
In that event Peter, these are definitely miss labeled. Called npn-no's,
they are actually pnp-nc's.
I figured miss-labeling wasn't something I had to watch for
when buying from amazon. But they obviously have ID10T's selling
there too...
If this can be made to work, I'll spend the sheckles and get the
superpinda at $25
from Prusa, its temp compensated, and the identical looking one used on
BIQU's BX
is not. So that one needs a big blower for about 30 minutes to bring it
back to ambient
temps before its safe to start the next print. The Prusa? Just Works.
Hot or cold.
Thank you Peter. You and your lady take care and stay well.
_______________________________________________
Emc-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-users
Peter Wallace
Mesa Electronics
(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.
_______________________________________________
Emc-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-users
.
Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/>
_______________________________________________
Emc-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-users
