On Monday, February 06, 2012 03:05:26 AM Kirk Wallace did opine:
On Mon, 2012-02-06 at 05:08 +, N. Christopher Perry wrote:
Thanks Kirk,
I did as you suggested, and while I was at it I measured the series
current when shortedï»؟ and found that it was ~2mA. My pulldowns were
in
I'm bringing up my mini-mill and have encountered a weird problem: I'm trying
to use pins 10, 11 12 on the printer port as limit switch inputs for X, Y, Z
axes, respectively, but the pins are acting like outputs. The limits switches
are active high, with ether voltage dividers or diodes in
On Sunday, February 05, 2012 01:28:12 PM N. Christopher Perry did opine:
I'm bringing up my mini-mill and have encountered a weird problem: I'm
trying to use pins 10, 11 12 on the printer port as limit switch
inputs for X, Y, Z axes, respectively, but the pins are acting like
outputs. The
gene heskett wrote:
This board claims excellent speed, as in 10ns propagation delays thru the
opto stuffs. That seems rather fast for opto's, and I haven't measured it
although I have the scope to do it with.
I don't believe it! If they are really opto-isolators and not some other
On Sun, 2012-02-05 at 12:41 -0500, N. Christopher Perry wrote:
I'm bringing up my mini-mill and have encountered a weird problem:
I'm trying to use pins 10, 11 12 on the printer port as limit switch
inputs for X, Y, Z axes, respectively, but the pins are acting like
outputs.
The parallel
On Sunday, February 05, 2012 08:41:06 PM Jon Elson did opine:
gene heskett wrote:
This board claims excellent speed, as in 10ns propagation delays thru
the opto stuffs. That seems rather fast for opto's, and I haven't
measured it although I have the scope to do it with.
I don't believe
Thanks Kirk,
I did as you suggested, and while I was at it I measured the series current
when shorted and found that it was ~2mA. My pulldowns were in fact too high
an impedance. I dropped them to ~300 ohms and everything is now working as
expected.
N.C.
On Feb 05, 2012, at 05:56 PM, Kirk
On Mon, 2012-02-06 at 05:08 +, N. Christopher Perry wrote:
Thanks Kirk,
I did as you suggested, and while I was at it I measured the series
current when shorted and found that it was ~2mA. My pulldowns were
in fact too high an impedance. I dropped them to ~300 ohms and
everything is
