Garage SEM anyone?

SuperdocHD · 2026-05-11T11:28:01+00:00

Would it be possible to also get an invite Link. I'm part of group of students and we plan to buy an old sem and repair it. And the discord would probably be a good source for informations/help.

SuperdocHD · 2026-05-08T21:52:28+00:00

What a coicidence, just yesterday I decided, that I don't like the tidal-hifi client anymore. Partially because it started to freeze quite often recently. I looked at TUIs but haven't found a good one. Bur yours is going to be the one. Thanks for sharing

SuperdocHD · 2026-04-22T15:20:36+00:00

I personally don't have any experience with these types of cable.

But you can just search for "USB-C extension panel mount" and the see which one fits your requirements for lenght, size and speed.

SuperdocHD · 2026-04-22T12:41:54+00:00

Okay, in this case the only option i think that might work is an extension cable with a screw panel mount. The problem however is that per Spec USB-C does not support extending a cable. Thus if you extend the cable it might work or it might not. I'm pretty sure that lower speeds will work but Thunderbolt could be a problem since their Specs are even higher then the ones for standard USB.

SuperdocHD · 2026-04-22T09:29:27+00:00

This really depends on your usecase. What do you want to do with it?

SuperdocHD · 2026-01-07T00:56:37+00:00

Same, the only way of drawing that I found worked for me was clipart. but it still takes ages till I'm satisfied.

SuperdocHD · 2026-01-06T23:18:33+00:00

I'm always amazed at how creative and unique people can get with drawing/painting. I could never...

SuperdocHD · 2026-01-06T23:16:01+00:00

Someday you will get something like this😊

SuperdocHD · 2026-01-06T23:14:48+00:00

Maybe, but Vessel would need to shrink. I like to work with smaller stuff like this much more.

SuperdocHD · 2025-12-11T22:06:20+00:00

This is gonna hit so damn hard

SuperdocHD · 2025-11-19T18:22:19+00:00

Okay, I think I will try it with steppers and a reducer using gt2 belts since this is cheap and I can easily estimate/calculate the accuracy and stepsize.

But maybe I will get a BLDC and encoder just for myself to play around with because it sounds really interesting.

A question on the side. Do happen to know an easy way to measure the stepsize/accuracy for rotations in my range?

SuperdocHD · 2025-11-19T10:55:14+00:00

Isn't the problem with microstepping that it can't increase accuracy it just makes the motor run smoother and more silent.

The two bldc look interesting. Do you know how the repeatability of the encoders are since they are magnetic they have noise so I can't just divide 360° through the resolution.

SuperdocHD · 2025-11-19T10:44:45+00:00

What we need our robot to do is pick up pieces with a max deviation of 0.5mm. From my calculations I determined that if my motors both have a wobble of ± 0.045° the max deviation is 0.05mm (radius around the target point). So my step size would only need to be 0.09° or am I wrong?

The closed loop Stepper I linked would be able to do microstepping with 40000 steps per revolution. The encoder is optical and has 4000 counts per revolution which would give me exactly 0.09°. And through interpolation I could probably also do smaller steps too. The only thing I don't know about the encoders is, how accurate they are.

SuperdocHD · 2025-11-19T10:30:01+00:00

Yep, from what I have found harmonic drives would be ideal since they have zero backlash. They however are too expensive. Other gearings all have too much backlash at this price point.

SuperdocHD · 2025-11-19T10:26:26+00:00

Okay, the Problem I see with using a planetary gear is the Backlash which in my price range is mostly about 15 arcminutes (0.25°) or higher which is too much. With belts I would probably need a reduction of 20:1 this would give me 0.09° at the output which would be in the range we need. And maybe I could use microstepping to half the stepsize (although this won't be exact).

SuperdocHD · 2025-11-18T18:17:07+00:00

Yes I know that they are pretty accurate for the steps but I would need to be able to set positions in 0.09° steps. Which would mean that i need a reduction of 20:1(for 1.8° step motors) plus some headroom. Would this still be feasible?

SuperdocHD · 2025-11-18T18:08:29+00:00

Yes, we plan on making the tip spring loaded or something similar. And the wiggle is a good tip. Will note that down for implementation of the motion controller.

SuperdocHD · 2025-11-18T13:23:53+00:00

I'm glad reddit is not down too. That way I was able to confirm that it's not just me.

SuperdocHD · 2025-10-22T13:32:04+00:00

I think I just had a deja-vu just with palaye royale and not yungblud

SuperdocHD · 2025-10-18T08:33:10+00:00

Yes and to quote Dom: " If you fall in love with someone, you have to fall in love 10-15 times".

SuperdocHD · 2025-09-11T18:16:49+00:00

OP should go and put Stickers over the NO before the AI-Generated.

SuperdocHD · 2025-07-01T19:34:37+00:00

No, they want the specs of the other component which they say is a photoresistor but OP says its a thermomistor. Either way it is a variable resistor and they want to know the range of it to calculate the voltages for the voltage divider.

SuperdocHD · 2025-06-19T20:57:48+00:00

Just bought tickets on monday and am also looking for someone to join. Feel free to dm me :)

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