The MP Select Mini cooling fan, or, why Malyan clearly has no clue what they’re doing.

The 3D printers made by Malyan for Monoprice.com are just silly. There, I said it.

The Mini Delta takes a lot of work to get good results from, and the Cartesian type Select Mini printers need a lot of mods for stability and reliability.

One issue I was having on my Select Mini, aside from the one where it spontaneously emits cats*…

… was that I was getting poor print cooling, leading to things getting slumpy and generally Jacked Up.

Object above is part of an improved fan duct to use a 50mm blower.

So the stock fan is a mystery wrapped in an enigma of misengineering.

It’s a 30mm fan rated for 9vdc. What? Arrggh! If that were a 12v fan you’d have options as to what to use as a direct replacement. With it being 9v, your options are…… whatever sleeve bearing folderol one manufacturer casts on their badly worn injection mold.

In all honestly, I broke the fan, but by doing things that should not have broken it.

I was getting poor cooling as I’d mentioned above, so I was setting Slic3r to run the fan at 100. The resulting g-code is M106 S255

After a couple of prints like this, I heard scary noises from the fan, and upon removing it I discovered the 9v label and a ring of oil it had thrown out of its bearing. Yuck. They didn’t even leave a way to get in there and oil the bearing.

I found this all suspicious. M106 S255 ran the little fan louder than the firmware default settings did. Normally if you send no g-code to override it, the fan will always run at a low speed any time the hotend is heated. It does not automatically stop.

Out of curiosity I measured the voltage using a true RMS meter. I set the temperature to 190C from the front panel and the fan started shortly into the preheat (much better after changing that stupid heat block). Voltage was about 8.7v.

I then sent M106 S255 and it jumped to 12.6vdc and the fan sounded……. lovely.

It broke as I was trying to reinstall it so I put in a 12v fan that came on a $10 eBay E3D V6 clone.

The result… The fan still runs at any speed I ask it for, so stalling isn’t an issue, but now it doesn’t self destruct at 255 / 100%.

When the new blower gets here I’ll have better luck with bridges.

*This is a feature, not a bug

Joe Jobbed…!

Well not exactly but

At the stroke of the new year, the 20 or so robocalls I was getting each day starting at 8 AM Eastern stopped. Blissful silence! I could leave my phone set to ring again!

Oh wait. This morning some text spam started going out as group texts with a huge number of recipients. Fellow victims all started clicking reply aaaaand I turned my phone off for a couple hours so it’d stop vibrating constantly and getting hot

It looks like I got about five of the messages, but each has a thread of dozens of replies!

Can I have an AMPS StarTac please?

AT&T Smeg-O-Net User Experience

Fuck You AT&T

After three hellish days of having dispatchers lie to me and tell me to stick around waiting for a tech that’d never come, waking me up at 5 AM and insisting I stick around until after midnight, all sorts of broken promises, and an overseas call center keeping THE ACTUAL TECHNICIAN waiting on hold for hours and hanging up on him repeatedly, our office has phones and almost half the internet speed we’re paying for!

This is still an improvement…. SADLY…. Now we’re no longer stuck with this clusterfuckery as our only link to the outside world. In case you ever find yourself shopping for business Internet and managed VoIP telephone services, LOOK ELSEWHERE and do yourself a favor. As janky as Comcast’s business fiber / metro ethernet / VoIP offerings are, with the vile potentially self-destructing phones, THEY ARE STILL BETTER ABOUT UPTIME… SORT OF. You know, when they aren’t having failures due to having installed everyone’s stuff to a fiber patch panel somewhere with dodgy uxcell brand fiber jumpers that arrived in a beat up China Post epacket. (I’m not even kidding here one bit)

sharecropping in cyberspace

Too cheap to pay a graphic designer for what their talent’s actually worth to come up with your company’s branding? Two for one special on Fiverr!

…..fuck this noise, angry reacts only

What in the electromagnetically radiant fuck

“completed” installation by a local WiSP

Let’s get that mystery battery charger board (?) off the metal framed switch

What’s on the other end of that zip cord?

Hurk

SUPER JACKPOT!!! 10,000,000 FAIL BONUS. EXTRA BALL IS LIT

That poor tripp-lite

Yeah that’s just some outdoor CPE setup (?) lying on top

Custom… Power… Thing?

I agree with this cat

Sync Pulse of Horror

Copied from where I wrote about it on Facebook…

Let me take a moment to tell a tale of horror. Sorry, I missed Halloween with this one….

The Evertz 7700ADA7: A wonderful piece of hardware. Truly wonderful, I have nothing but glowing things to say aboutAAAAHH HELL IT’S A PIECE OF CRAP.

https://evertz.com/products/7700ADA7

Look in its manual and you’ll see a big contradiction. The block diagram says it has buffers on every output. The text says it has three output buffers. In reality, best I can tell from physically inspecting the card, it has ONE and all the outputs are just paralleled… maybe in pairs or something? Look closely and you can see the ICs at the right where the outputs come off. Everything to the left of center or so on the card is the power conversion and fault detection circuitry.

The input can be set with 75 ohm termination onboard or hi-z. This is like the inputs on the old Grass Valley Group analog video DAs, except that those had a far more convenient setup with two BNC spigots on the back – you used it either as a loop thru (short BNC jumper to the next DA card in the frame if you needed more ouptuts) or popped a terminator on the unused one.

Evertz says you can use BNC tees to do the same thing on theirs, except… there’s no physical space for the tee to fit back there… and if you do somehow manage to physically connect the cards up this way it’s obvious their idea of “hi-Z” loads the line down BADLY after connecting two or three cards.

So, someone who came to that facility before me wired the cards with the black burst coming from the Evertz GPS locked sync generator and switch unit of HORRORS (more on this later!) to the input on the first of like six 7700ADA7’s, then a short jumper from output #7 to the input of the next… and so on…!!!

I mean, luckily, by some grace of Farnsworth’s ghost himself, this still managed to work… HOWEVER…

Please note that I said the outputs are not individually buffered.

The DA outputs were all full up when I had to connect a long cable to a new video playout system, except for one output on the first in the chain that went to some long abandoned weirdness halfway across the building.

I will state the following now that the statute of limitations is over and I am several thousand miles from anyone who would want to throw things at me for what happened.

We were in a newscast and a break was rolling at the time. I disconnected the mystery cable and there was no excitement. I connected the cable that went about 100′ over to the new playout system, and I heard screaming.

Apparently when I connected the new cable, a glitch occurred on the output of that DA, and since it had no buffers, it propagated down to all the others and effectively to every other piece of equipment in the plant. The people in the control room were treated to the sight of every source suddenly melting down and laaaazily reclocking and coming back one at a time.

At the same time, this lit the FU Cracker on each of our Ericsson satellite receivers. See, this model.. I think it was RX8400? … if you paid for a ton of extra option codes you got an internal frame sync/converter. This was EXTREMELY FRAGILE, though– if you caused any problem with the black burst sync, the FU Cracker’s 45 second fuse was now lit and there was not a thing you could do about it. Once the fuse burned down, BANG!!!! The video and audio were gone. It’d sometimes come back after an agonizing 15 seconds or so, but if it did, this would keep recurring until you rebooted the receiver.

You could practically hear the hissing.

Fortunately no sat feeds were used in the remainder of this newscast and I was able to go around and do the mass reboots once it ended.

So, as for that Evertz failover switch unit that fed the stack of DAs with blackburst… boyy that thing had a … failure mode… about it.

So the way that unit worked was it took the output of two independent GPS locked timecode generators that I think put out SMPTE timecode and trilevel sync. This fed into the failover box which would “seamlessly” take over if one of those went invalid or failed, I guess, and it also generated blackburst with VITC, had a small DA for the trilevel sync (4 ports or something), and also generated a 10 mhz reference signal and some other stuff I’ve long since forgotten.

The chief engineer needed trilevel sync for something near it, so he removed the terminator from one of the taps on that DA.

“Tick tick tick tick tick tick”, responded the failover unit.
Cue MASSIVE screaming from every corner of the facility. Bad sync hit HARD, all the satellite receivers puked their guts up instantly, just about the only thing that survived it was the Omneon playout boxes and the Kahuna switcher. No more live shots as the receivers decoding their ASI streams died. Yes, we were in a newscast. Recorded packages were frantically bumped up the schedule as the Omneons, Grass Valley K2 playout and cameras were the only thing left alive.

The Omneons and K2’s were really good about sync loss, if the sync went invalid they just switched to free running without any further ado. Everything else was just a fecking drama queen.

Oh no you didn’t

Another PTek. Another questionable combiner. This one doesn’t even make any damn sense. I’m scared to open up the top of the transmitter to find out why it’s wired the way it is. The resistors are sitting on top of that hand cut piece of random PTFE and will cause a fire if they ever dissipate any significant energy. This is inside an FM2500PS transmitter.

This is a two port Wilkinson combiner that combines together the output of the left two pallets and the right two pallets. Why it’s floating on the thick PTFE slab, I cannot understand— these resistors appear to have the terminal configuration in which one lead of the resistor is the heatsinking base, and the other is the solder tab which just passes right through otherwise. WHY IS THIS BOTH INSULATED FROM AND ELECTRICALLY CONNECTED TO THE HEATSINK??!! Basically, what WILL cause this combiner to blow chunks would be any imbalance between the left and right sides of the transmitter – a single module failure will roast the entire rig. Catastrophically. See video below.

The lower line from each side goes to the start of the harmonic filter network, where they are just unceremoniously smashed together. This is… about the caliber of a badly built CB amp.

Dare I open the top and look around or have I suffered enough torture already??

(edit: yes… sadly I did!!!)

Page spam cut— click to continue. If you dare. I warned you, and Alex Hartman always warns ME not to open these transmitters and look around. But I do anyway. Then my brain hurts. ARGH

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On top of spaghetti, all covered in tape – the 2018 Ford F150.

At work we have a rented F-150 to get up and down the mountains. I was going up to one of our sites, nearing the summit, when I smelled a burning plastic/rubber odor. I opened the hood (easier said than done– the placement of the safety latch is, to use my late uncle’s words, Kardashian) and found the cause after about a minute.

Behold….. Ford wiring.

So I’ve been under the hood of a few modern vehicles. All of them except this have the wiring harnesses protected by plastic tubing. This… uh, they just threw a lot of tape on it.

Interior: they used some kind of vinyl tape instead.

Weird shit.

The burning smell was a loose piece of tape from the harness on the right hanging down into the manifold. I removed it before taking the picture and buried it in the sand because it was actively on fire— it had glowing embers at the end.

What the fuck, Ford?

Incidentally I’m mad at this shitty truck already. It gave me a bloody nose. See, they put this weird aluminum roller in the seat belt buckles that serves only to make them insanely heavy. As I got out of the truck, the retractor brought it up at unnecessary speed to meet my face with an audible CLONK. I’ve seen the same buckles in Kia and FCA vehicles, but they are not anywhere near as heavy (the roller is hollow I guess). The roller makes no sense at all, it doesn’t turn and is loosely mounted. I’m guessing they did this to reduce wear on the fabric? Funny how my Subaru doesn’t have this and there are no signs of wear to the fabric so…. Uhhhh??

I could go on about how much I hate that steering wheel in the background but I’m out of shitposting juice

MicroREKT

I always used to wonder why every time I worked in a radio site I’d find the transmission lines going through the entry panel just goobered in there with silicone sealant or spray foam and the unused pieces of the Microflect / Andrew / CommScope / insert today’s name of the conglomerate cable entry port system lying around unused

Now I understand why and my arms and hands and back and legs all hurt, hours later

Woop Woop the FUCK POINT has been reached, this is as good as I can get this one. You just can’t get these things together if the cable doesn’t wanna go through straight.

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