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Cake day: July 19th, 2023

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  • sj_zero@lotide.fbxl.netto3DPrinting@lemmy.worldStepper not moving
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    10 months ago

    I use a tevo tornado which is similar in many ways to an ender3 and added a direct drive extruder. I ended up needing to change the wiring for the stepper motor because it just sat there jerking around but not moving. I don’t recall if I used a meter to measure resistance or if I just swapped wires until I got it working but it prints perfectly today and has for years.

    To do it I think I had to use a small screwdriver to push in the little barb that holds the pin in the connector (on some you can lift a little plastic tab on the connector to pull it out) then I could just push it back in place. Make sure you don’t disconnect your stepper while powered, it can toast your controller.





  • Interesting thing about gasoline engines, they become more and less efficient when the temperature drops.

    They become more efficient because the air being brought into the engine is denser and cooler which is better, but they become less efficient because rubber parts become stiffer, lubricant becomes harder to move, and overall everything is tougher to deal with.

    One result is that if you drive long ranges in -40C, your fuel economy is relatively similar to what it would be in warmer weather. You can blast the heat and your vehicle is toasty warm since it’s just moving waste heat around. I’ve done such drives many times since resources are not where people tend to be.

    As you approach -40 you’ll probably want to have your block heater plugged in overnight on a gasoline engine, but generally speaking you can get pretty cold and have the motor turn over just fine. I drove a diesel for a while in the far north and going back to a (really crappy) gas engine was surprising for how easy it was to just get up and go in really cold weather.


  • EV performance in -40C is something nobody talks about but I’m extremely interested in.

    There have been lots of videos of Teslas leaving a heated garage then flying around a snowy track in Norway, but that’s much different than getting in a car that’s soaked in the cold all night, driving it to work, then driving home after it sits all day. Or even better, taking that same cold soaked car and driving to the next city 13 hours away with only one or two places to stop along the way.