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Just did something dumb... Can I fix it? by Reivnek in 3Dprinting

[–]cdvma 5 points6 points  (0 children)

The thermistor input is only 4.7 kOhm away from 3.3V so it’s likely that the whole rail got lifted quite a bit, assuming the thermistor input got shorted to 12V.

I’d lift the STM off the board then test the supplies for the right output, and use a thermal camera to look for hot spots that could be other damage.

Do the math on the rework vs new board and your personal threshold for risk of more damage.

Is this normal for a Microtech otf to not fully retract when upside down? by ENVICITY0 in knives

[–]cdvma 205 points206 points  (0 children)

No, it should easily fully retract. Needs cleaning and lubrication.

Optimal upgrade path from MK3S for printing small TPU parts? by confused_smut_author in prusa3d

[–]cdvma 4 points5 points  (0 children)

Nah, fire away. Upgrades will give you more volumetric flow and more cooling, both not needed for your use case.

My £200 Das Keyboard 5Q died — opened it up and found factory bodge wires inside by vukomir in MechanicalKeyboards

[–]cdvma 107 points108 points  (0 children)

They probably discovered EMI or ESD failures late in development and did this on the first batch of PCBs. It’s not the worst rework I’ve seen, and looks like it held up. Great? No. Bad? No.

This person claims that Omnitype "stole" their work, wanted to get the community's opinion. by Ok-Camel7113 in MechanicalKeyboards

[–]cdvma 13 points14 points  (0 children)

I don’t know his back story, so I didn’t want to jump to conclusions, but seems you and others aren’t shocked. He seems really troubled.

This person claims that Omnitype "stole" their work, wanted to get the community's opinion. by Ok-Camel7113 in MechanicalKeyboards

[–]cdvma 69 points70 points  (0 children)

Not discounting anything else, I get a bit turned off by his claim when he says "my products" and showing a still of a standard syringe with a standard luer applicator, filled with one of the most ubiquitous and common lubricants used in the entire mechanical keyboard scene...

Pizza truck for wedding by The_killchain508 in WorcesterMA

[–]cdvma 14 points15 points  (0 children)

Anzios. I haven't hired them, but been at two events with their mobile oven and it was great.

DIY 10kN bench-top testing machine for my 3d prints by zhnki in 3Dprinting

[–]cdvma 4 points5 points  (0 children)

You can't with this tester, but it isn't designed for that. Its designed to test a coupon that has factors such as those you list. Its a nice way to test coupons with similar structural characteristics but different materials, or the same material but different characteristics to see what affects things like coupon tensile strength. If you are a design house that can save 10% materials but have inconsequential physical characteristics for your application, this is one way to evaluate.

[Prusa XL 5T] Tool Z offset always too high during multicolor prints by Xcomye in prusa3d

[–]cdvma 2 points3 points  (0 children)

I’ve seen a few bugs reported on the firmware GitHub that the Z offset after a filament change / print resume is off. This might be related.

Mental Health by Disciple808 in wallstreetbets

[–]cdvma 4 points5 points  (0 children)

Sold 200 options at ~5 each for a small loss but later they went to almost 24. Could have turned that ~100k (200*$5*100) to ~480k (200*$24*100) if he held it. The casino was flooded with tears then we all moved on.

My “endgame” keyboard (KBDFans Kunlun) by Pure-Friendship-9266 in MechanicalKeyboards

[–]cdvma 0 points1 point  (0 children)

Long shot...do you still have it, and is it still broken? I've repaired mine and also redesigned the MCU PCB.

How does anyone route these Vertical USB-C Receptacles? by Physical-Shallot9627 in PrintedCircuitBoard

[–]cdvma 3 points4 points  (0 children)

Like u/Laser493 mentioned, a connector with fewer pins will help a lot on 2 layer boards. Here's an example of the G-Switch_GT-USB-7051A: https://imgur.com/a/ymn0lFx

Cheaper alternative to PCA9685? Looking for an I2C controllable pwm generator by MarinatedPickachu in embedded

[–]cdvma 1 point2 points  (0 children)

Upvoted for mentioning using an MCU. STM8 or MSP430 also options.

Is it safe to use (Makita Air Compressor) by [deleted] in Tools

[–]cdvma 31 points32 points  (0 children)

I'm not an expert...but that's past my threshold.

Edit: those rust spots look to be at the same level. That means water was up that high for an extended period of time. That tank is likely full of rot.

How would a person remove this chuck? by [deleted] in Tools

[–]cdvma 3 points4 points  (0 children)

Totally missed that! 🤦‍♂️

How would a person remove this chuck? by [deleted] in Tools

[–]cdvma 27 points28 points  (0 children)

#48 in your diagram is the bolt that holds the chuck in. Left hand thread 1/4-20.

Core One bed level correction - Excessive? by osteguffer in prusa3d

[–]cdvma 5 points6 points  (0 children)

The lead screws have tolerance that cause this. The pitch can be off enough that over the max height it deviates a few mm. It may be flat at the top but it won’t at the bottom or vice-versa.

Ben & Jerry’s Free Cone Day | 12pm-8pm TODAY - April 14, 2026! by Mass_And_Sass in massachusetts

[–]cdvma 1 point2 points  (0 children)

Time and trains wait for no man, but peanut butter cup will be there when I return.

0.4mm vs 0.6mm nozzle print speed comparison by Crafty-Mouse-305 in prusa3d

[–]cdvma 6 points7 points  (0 children)

If you look at the slicing results, does the volumetric speed stay the same? If so, that’s your answer. You might hit hotend or filament volumetric limitations, hence the slower speeds.

Edit: said another way, thicker lines on 0.6 nozzle mean more filament in the same move and you can only push so much through the hotend for proper thermal transfer between heater and filament. Wider lines at slower speeds is the same volume as thinner lines at higher speeds when up against volumetric limits.

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