BigDanishGuy

Question: If you have tried a dodgy dual input hotend, what were your experiences?

Background: As with anyone else who have a single extruder, I've been contemplating upgrading to something with a bit more flexibility. But the idea of getting a whole new printer doesn't appeal as much to my wallet, as it does to my mind :-)

Scouring aliexpress for weird filaments with the mrs - you know, normal Saturday-evening-and-the-kids-are-sleeping couple activities - we fell upon a dual input hotend for creality cr10. It looks an awful lot like the hotend we have, and it comes with either 24v or 12v heater. It's only about 15€ so I might just give it a try, but it's pretty stupid when I don't even have a plan for an extra extruder as well. And I don't know how I would go about wiring that part up on my cr6 at the moment.

As the title states really. I need to refer to this diverse group of people, who somehow have gotten put in the same box labeled "sexual minorites".

I'm a boring CISHET vanilla white male, so I don't really know. I want to include as many as I can when I refer to "lgbtq+ people". I've been studying various flags, trying to find the one flag I need. But I can't really figure it out.

Is lgbtq+ the preferred term, or what should I use? Is a flag better? I don't want to hurt someone by not including them.

Questions:

• Can you test 450V high ripple current caps with a any old desktop RCL meter?
• Has digikey shipped me faulty units?

Background:

I've gotten a couple of 660uF (not a typo, it's some weird high ripple current caps for an outdoor AC unit) 450V caps to replace some that I decided were duds. Normally I only measure components when troubleshooting, but this being 20USD with vat devices I thought "what the heck, I better".

The caps in question are chemi-con EKHJ451VSN661MA59M https://www.digikey.dk/en/products/detail/chemi-con/EKHJ451VSN661MA59M/17728502.

Method:

I'm using a Phillips PM6303A, which is a 1kHz RCL meter. Ambiant temp is approx 15°C. The caps have a 20% tolerance, so capacity should be >528uF, but when measuring both caps settle at approx 450uF after a little while. After 16hours it hasn't deviated for the one cap I've left in over night. The dissipation factor, tan(δ), settled at 0.57, while the datasheet states that it shall be no greater than 0.2.

For comparison, the caps I thought was faulty, have been running for about 20years, with the same specs, but came out to 550uF and 0.3, and as the spec said 0.2 I decided to change them.

Solution: @DJPhil@discuss.tchncs.de has made some really insightful comments below, which are really useful. ~~If you just want the cap you can set the parametric searches for 660uF, or in September 2023 I've found that digikey stock(s/ed) chemi-con EKHJ451VSN661MA59M~~.

Update 2: Turns out that EKHJ451VSN661MA59M is not the ordering code you'll want. That would be EKHJ451LIN661MA59M which returns 0 results when you Google it, or maybe a single result in a few days linking to this thread. So it looks like you'd be better off just getting some 680uF with blade snapins instead and retrofitting the board if possible. Just make sure it can handle the ripple current. Always check ordering codes twice my friends!

Original post

I need help identifying the terminals on some strange caps found in an AC inverter main board. The reason I state the AC part, is that the only other mention I've found of this layout, was a question on digikeys forum regarding an AC inverter https://forum.digikey.com/t/can-t-find-the-right-terminals-for-a-capacitor/19332 The capacitor in question has the same measurements as the one in the link.

In my picture on the right you can see the layout of the terminals, there's room for three caps, but only two was mounted, hence the relatively clean pads. On the left is one of the two caps in question. It says nichicon LQ(K), 85°C. Nichicon has discontinued the LQ-series, and the datasheet doesn't mention a 660µF variant. I don't know what fujitsu did to get caps with capacitance outside the E24 series.

Question: What is the name of this type of terminals? And more importantly: where can you get 680µF 450V caps with them? I haven't found them on neither Farnell or RS-Online.

For the sake of people googling this in the future, the AC in question is a fujitsu AOYS09LDC and the board was marked K05CM-C-A(03).