To confirm that we indeed are back to recording semi regularly here is another episode! We would like to specifically thank Stefan for our very on topic podcast title! Also many thanks to Magnus / Philter for the very brief soundbite intro (track was Sunrise from Queen of Crows). Checkout Philter’s latest album here: https://Philter.no
Just a few of things we talk about (in no particular order):
- Another way to waste more time on social: Instamachinist newly setup Discord http://discord.gg/Mv7HTHu
- Emma’s Tool competition is back! https://www.youtube.com/watch?v=BrC39XPRdWo
- Stefan is making parts for a film developing machine: https://www.filmomat.eu/
- Applied Science EDM: https://benkrasnow.blogspot.com/2019/03/drill-through-anything-conductive-with.html which is based on the BaxEDM power supply: https://baxedm.com/
- Home Shop Machinists sinker EDM machine article series in book format: https://secure.villagepress.com/store/items/detail/item/797
- Ben Flemming’s (who is NOT a Canadian – Justin was incorrect!) website: https://www.homebuiltedmmachines.com/
- Max makes chips in the shop again and makes a(nother) tiny part. He also cleans dog fur out of pocket watches (check out his Instagram)
- Justin is building a Curta mechanical calculator. Maybe. You can find the drawings for the Type 1 and 2 here: http://www.museummura.li/
All that and much more for another 2+ hour episode!
You can listen to the podcast here:
or you can download it directly.
Subscribe in iTunes (and please rate us!): https://itunes.apple.com/podcast/home-shop-machinists-podcast/id1180854521
Max’s website: The Joy of Precision and also his Youtube channel: https://www.youtube.com/channel/UCdMt_havo3BxZJscvRCOGcw Max’s Instagram: https://www.instagram.com/joyofprecision/. Also be sure to check out Max’s Patreon page: https://www.patreon.com/joyofprecision
Stefan Gotteswinter website: http://www.gtwr.de/ and also his Youtube channel: https://www.youtube.com/user/syyl Stefan’s Instagram: https://www.instagram.com/stefan_gtwr/. Stefan is also on Patreon: https://www.patreon.com/stefangtwr
Justin’s Youtube channel: https://www.youtube.com/thecogwheel Justin’s Instagram: https://www.instagram.com/thecogwheel/.
thecogwheel 
Check out KB Electronics for DC and AC motor controls. I use a KBC125R with a treadmill motor on my lathe. https://acim.nidec.com/drives/kbelectronics/products/variable-speed-dc-drives/dc-drives-chasis Often on ebay for very good prices. If using belt drive then a 90vdc controller will give you control, from 110AC. And pulleys of course to get the RPM up per Stefan
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Max: this is brewed in north america
Stephane: is that a warning?
Perfect
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Gents: I suggest a helical coupling for the pinion mill! They are readily available due to the 3D printing industry. They are silent and don’t have any slop. Note that I say slop, as they do have a bit of elastic windup, depending on the design.
On the EDM side, I designed and built a home EDM unit many years ago. In my typical fashion, its over the top 😉 I designed a switching current source for it(essentially a switching power supply with a constant current output where the set current is turned on and off rapidly). I used a stepper for the electrode feed, with adjustable reference voltages for “go up” and “go down”. A modern design could be easily made from an Arduino brain and a little stepper driver. My experience is that EDM is done with oil, rather than DI water. If you have any conductivity in the water you move toward electrochemical etching/machining. Which is a cool process too!
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OiOi Lads,
Just catching up on the podcast.
Other than the History of Rome yours is the second podcast and first machining podcast I listened to. It is still the best. Season 2 is even better than the first.
Love your work.
Cheers
Franky
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