extravisual

I'm a senior in Mechanical Engineering, and my GPA looks terrible. I started in community college, where I completed all of my math, humanities, and fundamental engineering courses. I finished there with a good GPA (somewhere around a 3.5.) When I transferred to university, I was displeased to learn that my university has a policy where it does not transfer my old GPA. My credits were transferred in as pass/fail credits. They called it a "fresh start" but I call it bullshit. This has put me at a significant competitive disadvantage with my peers who started in university, as they have 2 years of fluff classes to pad out their GPA.

I'm not a great student, but I look far worse than other stu

After the nth time of having the tube come loose and cause a clog in the stock hotend of my Ender 5, I upgraded to an E3D V6 hotend. After installing it according to the directions and tweaking my firmware accordingly, weird worm-like artifacts have shown up in my cooling tower tests.

https://i.imgur.com/HrCHagP.jpg

The left has a retraction of 1.5 mm (Hydra direct drive), the right has a retraction of 2 mm. I don't know what to call this sort of weirdness so I have not had any luck googling it.

Prior to the hotend change, these cooling towers were printing flawlessly with 1.5 mm retraction.

The only changes I (knowingly) made to my firmware after the change are the thermistor settings a

After the nth time of having the tube come loose and cause a clog in the stock hotend of my Ender 5, I upgraded to an E3D V6 hotend. After installing it according to the directions and tweaking my firmware accordingly, weird worm-like artifacts have shown up in my cooling tower tests.

https://i.imgur.com/HrCHagP.jpg

The left has a retraction of 1.5 mm (Hydra direct drive), the right has a retraction of 2 mm. I don't know what to call this sort of weirdness so I have not had any luck googling it.

Prior to the hotend change, these cooling towers were printing flawlessly with 1.5 mm retraction.

The only changes I (knowingly) made to my firmware after the change are the thermistor settings a

After the nth time of having the tube come loose and cause a clog in the stock hotend of my Ender 5, I upgraded to an E3D V6 hotend. After installing it according to the directions and tweaking my firmware accordingly, weird worm-like artifacts have shown up in my cooling tower tests.

https://i.imgur.com/HrCHagP.jpg

The left has a retraction of 1.5 mm (Hydra direct drive), the right has a retraction of 2 mm. I don't know what to call this sort of weirdness so I have not had any luck googling it.

Prior to the hotend change, these cooling towers were printing flawlessly with 1.5 mm retraction.

The only changes I (knowingly) made to my firmware after the change are the thermistor settings a

I recently replaced the motherboard in my 3018 CNC with a 3D printer motherboard. The old board burned out within 3 days of getting the thing. The new board is a Bigtreetech SKR 1.3 with DRV8825 drivers. I'm running Marlin firmware and have it mostly working well.

I'm not sure how to go about controlling the spindle though. The spindle included on the 3018 is a small basic cheap DC spindle, presumably 24V. What I'd like to do is use the bed heater output to directly control the spindle with minimal additional circuitry. My assumption is that heated beds on 3D printers likely draw much more power than this spindle does, so it should theoretically be sufficient to run. However, I know that DC

I recently set my 3D printer (Ender 5, if it matters) in an enclosed shelf. Ever since then, both the printer and the shelf have been giving me consistent static shocks. I know it's winter time and it's dry, but these shocks are more painful than what I consider normal, and seem to be getting more severe.

When I don't run the machine (power strip that it and some accessories are connected to is switched off) I do not seem to receive these shocks.

The shelf is entirely metal except for some sort of fake wood door. It sits on plastic or rubber casters, which sit on vinyl tiles on a concrete floor. The house has no grounds (very old house, not mine), so I'd guess that the shelf is very isolat

I'm approximately a junior (finishing off some junior stuff while I take a few senior-level classes because scheduling) in mechanical engineering with a minor in computer science. Last semester I took a class on the basics of FEM using MATLAB that I quite enjoyed. I was wondering how these concepts might be applied for dynamic stress simulations.

For example, let's say I have an object that is represented by a basic system of trusses, and I apply a sudden impulse to the object, say, from a rocket motor. I know how the object would react from a rigid body perspective, the resulting velocities, etc. What I'd like to understand more is the internal stresses caused by the impulse.

Another exam

Sorry in advance for the wall of text.

I am looking for tools/info for analyzing the strength of a wooden structure. I am a third (ish) year mechanical engineering student, and my education has pretty much consisted of exclusively metal thus far, and very little on the topic of complex frames, so I don't know where to begin.

For context, I have been cleaning out an old barn (built in approx. 1920s) and I've discovered that a portion of the foundation has shifted considerably -- about 3 inches outwards -- and is flexing the wall with it. I live on top of a hill in a rainy location, so shifting ground is fairly typical, especially over the nearly 100 years the barn has been standing. I asked

Has anybody ever experienced any sort of confusion-like side effects from ADHD medication? I was diagnosed and started medication in November, and ever since then it seems like I just make consistent small errors, particularly when numbers are involved.

I've been trying to schedule exam accommodations at my college. I have an exam today, and only now that somebody pointed it out, I notice that I somehow managed to schedule it for March 8th instead of Frebruary 8th. This is just the most recent and most annoying of many similar errors. I also have been copying down incorrect numbers on homeworks, etc.

I've been on adderall, adderal xr, and now ritalin.

It may very well have nothing to do

I'm looking for a good app for planning my classes. I mean setting it up with my schedule, assignments, etc. Ideally it would display a constant reminder of upcoming assignments i.e. "Assignment 2 due in 3 days."

It would be extra extra nice if it had a webui or windows app as well, as managing these things on mobile is tedious and I'd never get around to doing it in full.

I'm sure this has been asked many times. Sorry if something like it is on the sidebar, but I'm on mobile and can't figure out how to view the sidebar.

I do not trust the quick lube places and I'm picky with my oil changes. Can anybody recommend a good shop in Pullman or Moscow to get an oil change done? Bonus points if they let me provide my own oil and filter. Extra bonus points if it's a location where I can just do it myself.

I don't think Cougar Ridge would appreciate me changing my oil in their parking lot.

I was diagnosed about a month ago, and was put on 10 mg Adderall twice a day. It didn't really seem to do anything, so my doctor upped it to 15 mg twice a day. It feels like if it's doing anything at all, it's marginal at best. I can't tell when it kicks in, nor when it wears off. I want to try switching to an extended release med like Vyvanse but I'm not sure if I should continue trying more dosages of Adderall before going that route.

I was hoping to get some thoughts and opinions on the topic.

How long did you all try one particular med before your doctor switched you to another? How high do normal Adderall dosages go? If one med seems to have no effect at all, is it even worth going up

All the recycles are being replaced with landfills, and the landfills seem to be all completely full all the time. What's with that?

I've been looking into clubs at my college and haven't really been thrilled with what I've found. Most clubs don't have much to offer for mechanical engineering students. They seem far more heavy on the electrical engineering and computer science side. This is unfortunate because there are a huge amount of mechanical engineering students at my college, and apparently not enough clubs to go around. Every club I've attended so far has had 15 or more mechanical engineering students standing around with nothing to do.

I'm considering starting my own club, possibly focusing on building machining tools (custom CNC Mills, 3D printers, etc). Is it worth the effort to get some actual hands on experi

I'm a new student here (transferred in as a junior). So far all of my classes have mandatory attendence policies that are enforced by random taking of attendence, in-claes work, etc. Is this a university-wide thing? I rarely had mandatory attendence at community college.

Normally it would be fine but I have this horribly dry snoozer of a lecture at 8:10 that I would really rather skip and study at home for.