HDMI over Ethernet box on either side.
$300 per connection: 2 display connections and two USB connections would cost $1200.
https://www.bhphotovideo.com/c/product/1649024-REG/kanexpro_ext_50m18g_4k_18gbps_hdmi_over.html
https://www.avaccess.com/products/u3ex100-usb3-2-extender/
Does this answer your question?
My solution isn't cheap either: 10m USB-C 10gbit: 50€ each(b-stock/customer returns, normally expect to pay 100€), 15m DisplayPort & HDMI: 40€ each.
Total is approx. $200-2500 between cables and building materials.
And more often than not I find myself having to change one thing to wireless
Wireless HDMI is pretty interesting but low quality and high latency. The 60 GHz never took off and wouldn't work anyway as it can't pass through walls.
Wireless USB was a thing with USB 2.0 but it is dead. There was also some 60GHz USB for VR but that also failed in the market.
Water won't get there and if the entire house is flooded and the walls are wet.
Fire protection is up to code.
If you would want to specify this (commercial installation) you likely would need to explicitly allow its use as this shape is not in the ISO/DIN standard.
Data rates and cost:
2x Display connections = 40 gbs
2x USB 3.0 = 10 gbs
=> 50 gbs through a CAT 7 is difficult
OM4 fibre optic is dirt cheap (under $1/m) but the KVMs are expensive at $800.
Using optical thunderbolt cables is also very expensive with $700 for the cable and dock.
UL94 V0 filament is available: PLA, PETG, ABS, PC and probably more.
V0 means stops burning within 10 seconds and ~~no dripping~~. That's good enough for these applications.
edit: apparently dripping is allowed as long as those aren't flammable. Regardless most V0-rated filaments don't drip as the "charcoal" when exposed to fire.
Had to fit HDMI & Displayport cables through 25mm/1 inch electrical conduit (building static limits it to 25mm). The issue is that the connector won't fit through the commercial 90-degree corners.
Solution? Enlarge the profile while keeping the bending radius:
Some CAD and a 3D print later I have the solution no money can buy. That's the power of 3D-printing and modeling.
That's fair.
$10 retail
approx. $7 for the manufacturer (30% retail)
cost 2x "formular": $3.5
With packaging, this might cost around $3 to make.
Prusa XL is a difficult machine.
On the one hand, it pushes toolchangers to the mainstream. On the other hand, it is utterly unreliable for it's price.
Paying $5k for a printer and then finding out that the printed parts they used deform causing repairs, the heatbed title issues and some more and this is already after a massive delay (launched a few years later than they initially "announced").
The previous goat of toolchangers was the E3D toolchanger. While not perfect it at least had the build quality to match its price point (btw. lower cost than the Prusa XL) and if you fix one minor design oversight they are reliable.
There is no clear answer to what is better.
CoreXY:
bedslinger
TL;DR/Opinion?
Those low cost Aliexpress hdmi over RJ45 are "last gen" HDMI limiting yourself to 4k@30Hz. This place already has CAT7 cabling so this would have been so much easier but sadly it isn't good enough and the current gen are to expensive.
They are fiber optic with copper for power supply and side channel. For some reason they are fairly affordable compared to OM3 fiber solutions. Probably due to them running multiple fibers allowing the transceiver to be slower and simpler. With OM4 cables there is only one fiber per direction. I think HDMI is 4 pairs so it is 5GB/s for 4 fiber compared to 20GB/s for the OM4 cable.
I personally hate copper cables. There are so many bad cables out there that it can be hard to find one that works reliably (2-5m range). Knowing now that you can buy 5m fiber optic for 30€ I probably will move forward only buying fiber optic and just coil up the excess length.