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<div class="moz-cite-prefix">It's notoriously difficult to measure
these kind of resistances using the two-wire method, so please
double check before going any further.</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">Do you have a 4.7 ohm resistor you can
read using the same meter, just to verify test meter lead
resistance</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">or pass a known 200mA thorough the
phase (with one meter on current in series), and measure voltage
directly across the phase using a second meter.</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">-----</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">If you can't do either of the above,
what resistance do you get when you short the meter's probes
together ?<br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">slowly, slowly ...</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">- Mark<br>
</div>
<div class="moz-cite-prefix"><br>
</div>
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<div class="moz-cite-prefix"><br>
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<div class="moz-cite-prefix">On 24/02/2020 2:42 PM, Michael Dawson
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CABGCvpambJ1X=2Wuhksa0g4O0dg_cxc=V5KNTT15bVYoNy4qAw@mail.gmail.com">
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<div dir="ltr">OK Measuring 5.7 ohms through a phase.<br>
<br>
<div>Does this suggest it's not a 1.33A?</div>
<div><br>
</div>
<div>Cheers</div>
<div>Michael</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, 24 Feb 2020 at 14:24,
Mark Atherton <<a href="mailto:markaren1@xtra.co.nz"
moz-do-not-send="true">markaren1@xtra.co.nz</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<div>So, a bit like <a
href="https://www.banggood.com/search/990669.html"
target="_blank" moz-do-not-send="true">https://www.banggood.com/search/990669.html<br>
</a></div>
<div><br>
</div>
<div>Looks like the standard length is 34mm, colours may be
standard, and weight is 220g. Allowing 12g for your gear,
this all sounds very similar..</div>
<div><br>
</div>
Your part number is D42HSC1413B-24, so it looks like the D42
part could be associated with faceplate size.
<div><br>
</div>
<div>googling "d42hsc" stepper motor indicates that d42hsc
may be the family of the part you are looking for.</div>
<div>
<div><br>
</div>
<div>The DC resistance of the Bangood part above is
2.1ohms per phase.<br>
</div>
<div><br>
</div>
</div>
<div>If you can measure low resistances with accuracy, see
what your resistance is for one phase. Or pass 200mA
through a phase and measure volt drop.</div>
<div><br>
</div>
<div>-Mark<br>
</div>
<div><br>
</div>
<div><br>
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<div>On 24/02/2020 1:32 PM, Michael Dawson wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>4 wires into a 6 wire plug, colours from
left looking towards the motor, black, space, red,
green, space, blue.<br>
Dimensions 42mm x 42mm Faceplate x 33mm depth of
motor.</div>
<div>232 grams weight including cog, can weight without
that is that would help.<br>
</div>
<div><br>
</div>
<div>Cheers</div>
<div>Michael</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, 24 Feb 2020 at
13:06, Mark Atherton <<a
href="mailto:markaren1@xtra.co.nz" target="_blank"
moz-do-not-send="true">markaren1@xtra.co.nz</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px
0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">Hi Michael,<br>
<br>
Welcome aboard.<br>
<br>
A few parameters which may be useful:<br>
<br>
- How many wires, what colours<br>
<br>
- Overall dimensions<br>
<br>
- Weight<br>
<br>
Regards, Mark<br>
<br>
<br>
<br>
On 24/02/2020 12:25 PM, Michael Dawson wrote:<br>
> I am trying to calibrate the A4988 drivers for
the stepper motors for <br>
> my laser engraver/cutter, using Arduino Uno and
the CNC shield, <br>
> (because the one that came with the cutter was
pirated software and <br>
> didn't work how it was supposed to and I want to
run laserGRBL anyway).<br>
><br>
> The issue I am having is, I have not got the
specs for the stepper <br>
> motors and aliexpress did not provide the specs.<br>
><br>
> I think they are nema17, but the only hint I have
to that is that when <br>
> I search on the number etched into the motors
D42HSC141B-24 I find an <br>
> old banggood ad saying they are nema17 but if you
click on the link <br>
> the original ad is long gone.<br>
><br>
> I currently have them set to 0.952v when measured
connected to the <br>
> arduino and cnc shield which is what was
suggested, if they were rated <br>
> to 1.7A. I'm hoping that is correct for these
steppers, so I guess my <br>
> question is does anybody have these same steppers
and know the specs, <br>
> or do they know it they are indeed rated to 1.7A<br>
><br>
> Or is there a way to find the Amp rating other
than the etching on the <br>
> side of the stepper?<br>
><br>
> Any help would be much appreciated.<br>
><br>
> Oh hi BTW, my name is Michael, one or two of you
may know me, I ran <br>
> Red Dwarf BBS back in the day, (I just
remembered, I had the Red Dwarf <br>
> logo display in RIP script when you logged in,
pity that never really <br>
> took off.)<br>
><br>
> Michael</blockquote>
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