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Showing content with the highest reputation on 05/07/2024 in all areas

  1. Similar thing happened with Tektronix back in the day. A big part of their business was supplying to the US DOD. But in an attempt to reduce cost the DOD placed an order with Hickock and Lavoie, saying that they wanted them to copy the Tektronix scopes. Tek got wind of it and started putting a random hole in the rear panel of the vertical plugin. When this appeared in the Hickock copy, Tektronix sued the UK government in 1961. Took a while (18 years!), but Tek won $4.5m in damages from the US Government. Described here https://vintagetek.org/clone-scopes/ So "mistakes" can show up a plagiarizer of the design.
    3 points
  2. 2 points
  3. One last update. Finally got the group photo back from the photographer. Thought I would share. Cheers - mikey
    1 point
  4. Well, I decided I needed to upgrade my CNC machine (replace almost everything from the original machine I purchased). having already upgraded the controller, spoil board, spoil board mounting and spindle it's time to look at the axes .... First I got myself an 80mm diameter er20 ceramic bearing 2.2KW water cooled spindle with labyrinth seals to replace the cheap 65mm 1.5Kw er 11. To fit the 80mm spindle I had to make a new mounting plate. This included experimenting chamfering and threading. I settled on 0.3mm chamfers at 45 degrees and experimented with thread milling. The result I think is ok: (full discloser I purchased tooling plate so the top and bottom surfaces were already machined flat, but all the other surfaces got machined. I have ordered 4 nema 23 closed loop steppers (3NM - about twice the holding torque of the original open loop steppers the machine came with), which will entail replacing most of the wiring loom, removing the existing open loop motor drivers, removing the motors, some software config of the new closed loop drivers and some changes to the controller wiring. The original divers have no error output pin so the controller has no idea if a stepper has an issue. The new drivers include error output pins so they will need to be connected to the controller. (stock jpeg from the ebay listing, I'm still waiting for delivery) I have also replaced the standard 'deep' groove (6001 series) bearings inside the bk12 bearing housings with angular contact bearings (7001 series) as per this you tube video: I also noticed that all the bearing blocks were attached to the machine with m5 bolts despite the blocks being designed for m6, So I plan to replace those bolts and find a way to make new threads in the machine housings. The nema 23 motors are also designed for m5 bolts but the machine uses m4 (on avery axis except Z), again I don't know why fox alien decided to use one size smaller bolts on everything that drives the axes so I will have to machine new back end plates/motor mounts too. After these upgrades and fixes the only original parts of the machine left will be the frame, axe and the metal case the electronics came in. It's so nice to have a cnc machine so I can make parts to upgrade my cnc machine...
    1 point
  5. I still go back and watch this scene from time to time. The way Edge immediately gets up and moves to see Jimmy's hands, Giving no Fucks about blocking the camera and the crew. And Jack has to put his guitar down and give that oh so loving look... good stuff. I do wish that they just played together more, and just did a lot more of ^^ this. The movie could work in a much longer format. But this was before the Netflix mini docs. Thanks for the reminder.
    1 point
  6. I needed a replacement pour over scale after my Amazon jobbie gave up the ghost and the replacement was subpar. Was leaning towards an Acaia Lunar or Lunar S given my experience with the Lunar that got bundled with the espresso maker. I decided to check out the Timemore Black 2.0 based on some input here and a bit of research. It was my first purchase on Aliexpress (Alibaba related...again based on a suggestion here). $43 which is hard to argue with. Took a bit to arrive but not terrible. So far it has been pretty good. It is responsive and accurate. Only thing I'm still getting used to is the Tare...it's a bit slow and you don't know you got it right...you have to have a split second of faith. Also, the springs / mechanisms that allow the scale to move and thereby calculate weight are a big "springy or spongy". Not a big deal but it takes away a from a solid feeling. My conclusion after only having it a week...good for the money. HS
    1 point
  7. Not sure if this belongs here, but last night I watched a movie about Jimmy Page, The Edge and Jack White: It Might Get Loud. Published in 2009 and made in 2008. Can't believe I missed this one. Very much enjoyed hearing about the individuals and getting to see them jam was pretty cool. Jack White...special. LOL. HS
    1 point
  8. What your favorite music says about you — and your politics https://wapo.st/3UwjXj7
    1 point
  9. My best friend from high school popped up out the blue. I got a Smugmug message from him. He passed though town on other business and we spent a few hours monopolizing a table at the Southport. I had kind of forgotten that it was from him that I got my, ahem, sense of humor. (although he claims it was the other way around). Which made me realize that it's been way too long since I've even lurked here. So I'm posting and promising to do better
    1 point
  10. In the same boat as Carl. Haven’t been spending enough time here - miss y’all. Classes are over though and my life is calming down so I’ll be around more. In the meantime I’m trying to fly to Colorado but evidently our new plane (the one we supposed to be on had some mechanical issues) had too much fuel and they had to defuel, getting rid of 5600 gallons of fuel!? WTF? Anyways, just spend the last three hours on the plane waiting to de-fuel. We’re finally taking off. Thanks United.
    0 points
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