[chbot] Robotics Group meeting, Monday 18 Octr 2021, 630pm, 5 Idris Road
markaren1 at xtra.co.nz
Mon Oct 18 10:34:22 BST 2021
Good turnout with 28 attendees, and lots of huddles-of tech-talk. $40 +
change (in gold, and flat-money) collected and transferred into the
robotics loose-change jar (for later banking).
All sales from the trading table should go into the brown box on the
wall, and are directly for the benefit of our host club, NZART Branch 05.
Equipment donations are welcome for the trading table, but no CRT based
product, printers, toner or items that are likely to be a disposal burden.
With thanks on behalf of the group,
Mark started the evening talking about his effort commissioning the
first-article EHT power supply (the design of which had been discussed
that the previous meeting). He also passed around some oddments
including a SPDT water valve, with wax-motor actuator, a right angle
Schrader valve, and a well designed mirror mount.
William brought in and discussed upgrades he has been doing to his ‘286
“laptop”, including the ‘287 co-processor.
Andrew brought in and discussed a PCR automation jig he had been working
on, in conjunction with a physician in Zurich.
Michael talked about his efforts designing a 3kW electric furnace, along
with some of the trials and tribulations. He also powered up a (medium
power) air-plasma source which was able to melt copper in air (!).
Graham brought along a steel pendant-mold he fabricated for Molten
Media. Item had been made using spark-erosion from a graphite positive.
Robin talked about his adventures building a Rocket-Mass Heater. Also an
autopsy of the project. Most interesting. He also talked about a
diamagnetic piece he found while repairing and rebuilding a small
Synco talked about a cascaded power supply he has owned for a while.
Unit is capable of delivering around 60V at 12A, and features current
limit and a USB interface.
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