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And now for a lovely afternoon’s shitpostingRead more “I’m pretty sure this just means “PC Load Letter””
* If you’re just here for kitty silliness, scroll down.
No one in particular: “Desktop 3d printing will revolutionize everything! We will have limitless access to rapid prototyping and production of vital parts where and when needed and the resulting advances in technology will be amazing!”
Absolutely no one in particular: “But people will print untraceable weapons and… terror!!! aaaahh!”
Me: “heehee it’s a tiny Waffle House.”
So I made a bit of a silly mistake. I saw that Micro Swiss had this sexy new NG extruder for the Creality CR-10 and Ender 3, and I’d just bought this Geeetech A10M which had a COMPLETELY AWFUL extruder and hotend that had an incurable case of plasti-slobber that more or less made it incapable of skipping and resuming extrusion — retraction doesn’t even stop it AT ALL. I figured, hey, this would fit on the Geeetech too, right?
….the answer is, kind of, if you replace a LOT OF CRAP 😀
I do not recommend this if you’re not dedicated and/or kinda in need of a severe distraction from the trials and tribulations of the outside world like I am. Start with an Ender 3 instead if you want to get up and running on this sexy extruder system quickly. (As of when I wrote this the extruder is out of stock – I hope it’ll be back soon, because it’s SO NICE.)
So, what I found it needed:
* New belt. The belt comes up like 1/2 inch short.
* New heater. Not only is the stock heater a weird size, but… it SUCKS!!! The stock heater is only 30 watts. I don’t understand why they did this but it explains why I was never able to get the thing to heat above 215C without timing out and Marlin screaming “Heeeeyyyy, I’m halting now and just wanted to let you know I might be on fire over here” at me. I replaced it with a 60 watt 24 volt heater which works just fine (don’t forget to PID tune again!)
* New fan. The shroud that comes with the Micro Swiss NG is sized for the 40mm fan on an Ender 3, but more importantly, the (20? 30?) mm sleeve bearing fans that come on the Geeetech are terrible. 😀
Amazingly, the print cooling fan which is a 4010 blower can stay – that is identical to what comes on the Ender 3 so it transfers over.
I spliced the wires on the fans to use the original JST plugs because they’re weird and I wanted to keep the neat little carriage board.
* Lots of random Metric screws!!
The original Geeetech mixing extruder is a hot sloppy soup sandwich of failure and it just had to go. This is what it looked like as I was disassembling it. Also, the “3dTouch” probe is a wobbly shaky mess with poor repeatability and has been replaced with a real BLTouch. Only buy the 3dTouch if you really really like having to mess with the Babystep Z function EVERY DAMN TIME you want to print something. Argh!
…also the default config for Marlin 2 on this mainboard does not enable babystep! WHY? Enable this!!! HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH—-
And now……. the new, beautiful little extruder…..
First off, I found it necessary to add washers and different length screws to secure the rollers to the carriage. The washers were needed because I guess the wheels Geeetech uses are thinner than the Ender’s wheels and the carriage scraped the rail.
The spacing of the mounting holes in the carriage board on the Geeetech are the same as the mounting holes in the stepper. I mounted it around the top of the stepper with a couple of longer screws and spacers. Please note the pinout of the probe – this is documented exactly nowhere by Geeetech aside from a very poorly made video. The pinout from left to right (facing the heater plug) is brown, red, orange, black, white. Also note that the heater wire fell out, it was not tightened correctly at the factory and I’m sure that helped that 30 watt heater warm up even faster! Uh, no.
So, the Micro Swiss is kinda cool but boy, can it ever develop extruder pressure – if you have the first layer too high, it will buckle *violently*, catch on the nozzle, and result in the print getting yeeted right off the bed!!! So, if you get lumps, bumps, buckling, waves, etc, STEP UP! I’m used to the behavior of cheaper Bowden extruders where the extruder doesn’t have reduction gears and will just skip steps when the pressure gets high, combined with the spring action of the filament in the Bowden tube – you can get away with having the first layer too tight and it will mostly print accompanied by thumping noises. This one will not let you get away with it, the print will get yeeted! 😀
Anyway, that’s dialed in and it’s printing a tiny Waffle House. Good times.
Now, as for that feline silliness: This is Gingy being all like “HOW ABSOLUTE DARE” over having to share her dish with a wild turkey. The turkey would be absolutely fine with sharing, but Gingy doesn’t trust him.
One of my giant platform boots broke apart after probably about two years of me wearing them to work every day. For them being boots more intended to be worn for stompy dancing at a goth club, they put up with that amazingly well.
Duck tape held them through their last day.
My boss saw this and said it actually looked pretty neat – he envisioned a pair where one boot is black and one silver being pretty awesome. I agree.
Do you ever look at something and wonder, “why in the actual hell?!”
This is one of the RTU (Roof Top Unit) air conditioners at one of the transmitter sites. It looks like a total pile of garbage but still works for some inexplicable reason. It was made by Payne – their logo still survives on one side but all other identifying marks are gone.
Just look at that glorious weird ductwork. It’s next to the roof kerb where the ducts pass into the building, and then the ducts do a giant whirl around it. There might be an inline heater in the duct at the very end but who the heck knows.
Every now and then, it’ll yeet the evaporator fan belt. Last time, it yeeted the motor pulley too!
It looks like someone replaced the motor in this thing’s history and when they installed the new one, they found the shaft key didn’t fit and left it lying in the bottom of the cabinet and just tightened the set screw against the shaft. This worked until it eventually started slipping and the pulley spun on the shaft. I found it with the belt off and the pulley dancing around on the shaft. When I turned the power off, the pulley fell onto the roof. The shaft bore now measured 5/8″ on one side, 3/4″ on the other — it had become conical!
I got a new pulley and shaft key from McMaster and put it all back together, it works, but sounds a tiny bit more like a lawnmower. I don’t think it’s all that much longer for this world, honestly.
So on another note, Carrier got away from belt drive fans on their newer RTUs! Look at this monster that just went in at the other site..
The evaporator fan, which moves the air to be cooled from indoors, is now a big vaneaxial type. It’s amazingly quiet too. Smaller vaneaxial fans can be found in 1 rack unit servers where they are most definitely NOT quiet, and larger ones are used in tunnel and parking garage ventilation.
I dunno, it seems like replacement of the Payne at the aux site is low on the priority list but I’m a little concerned that we’ll find it should have been higher on the list if we have to broadcast from there for a while over the summer. I can only imagine how many kilowatt-hours are being wasted via that pile of rusty crap. Somehow I’m imagining it being 10 SEER or less…
So there’s literally a creep “gear” – the ratio blips up a little at very low speeds!
Now, as for the question of what the converter lock does: whatever the hell it feels like
There is a pattern though: let up on the gas and it usually disengages. In cruise control it usually stays engaged, and going downhill in low tends to keep it on for engine braking.
I’m pretty sure the nasty all in one would make the nice turquoise fade out to dead grass green, but I dunno. I have never let anything that foul touch my elegant rainbow.
I’m pretending to know what I’m doing with makeup, if this raises any questions please refer to the following meme
This is a post full of cats.
My coworker, Amina, sent me these pictures of the station cats and I love them so much. I always wanna boop that little spotty nose but Scrappy always mooshes his whole face into my hand first!
And here’s Miss Cassie
Oh, and two turkeys. These have thankfully been wise enough to avoid sales department windows. We’re still waiting on replacement glass….
I got a broken MiniDV camera pretty much free for the asking and took a look inside. Well, I’m glad I didn’t go in expecting a successful repair because oh no
Probably 50% of the weight of this thing is tiny screws.
I was intrigued and horrified all at once that a tiny cog belt was visible! See it peeking out there to the left of the rubber pinch roller?
The iris was stuck closed. I’ve seen this failure on a few JVC mini DV cams and had never opened one up to investigate. Upon seeing the mechanism I’m not surprised this happens. It’s a combined aperture and ND filter with two weird thin plastic blades that have stuck together, actuated by a very tiny rotary solenoid.
So there’s the tape transport, it has only two motors aside from the head scanner. A very small pancake capstan motor is under the side where the pinch roller is; the one standing in the corner controls the load/unload action.
And finally, that tiny cog belt runs between the capstan motor and a pulley that drives the gear idler. The tension is regulated by a spring loaded brake (felt?) under the take-up reel and that’s pretty much it. This isn’t exactly a very sophisticated transport.
I can’t really imagine actually repairing one of these. Everything had to come out to get to the back of the transport and it’s a total mess in there. Wow.