On Tue, Oct 04, 2022 at 02:56:55PM +0200, Roland Exler wrote:
> Just a guess. 31.75 mm would be 1.25". As many dimensions on PCBs are based
> on inches could this be the actual value?
Siemens as a company rarely use imperial measurements, unless they have to.
> > as you can see from the pictures, I already got some special alignment
> > pins and 3D printed some carriers as a prototype for the final steel parts.
> > Testing the feeders with those brought up the question of proper pin pitch.
> > I'm pretty sure that the pitch cannot be 31 mm, as the wider feeders have
> > not only the alignment bushings, but also a hole without a bushing to make
> > space for the next pin they cover, see picture. With 31 mm pitch, the
> > second pin scrapes (or barely doesn't scrape) at the bushing-less half
> > hole, which probably isn't what Siemens engineers had in mind.
> > Therefor my theory is that the pitch has to be larger, probably 31.5 mm,
> > maybe 31.6 mm (got this dimension from a Siplace dealer, but I wouldn't
> > trust it enough for a few hundred Euro manufacturing expense for the steel
> > parts). The 31.6 mm pitch is also to be found here:
> > https://www.thingiverse.com/thing:2616380
- but it could be an arbitrary
> > number as well.
I didn't measure it myself and got it from someone (don't remeber his name) who
was on this list with some teardown videos on Schultz feeders.
He had a Siplace feeder table and could theoretically measure over multiple pins,
but I can't tell how he actually measured.
All I can say is that those values work well on a well calibrated printer,
even with wider feeders.
> > For me, this is about ensuring compatibility with all SIPLACE S feeders,
> > even those I don't have right now.
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.