He even wore the proper shirt...

The six sided mirror thing is a polygon mirror motor.

Clell Harmon Thanks for information! I have been trying to learn the parts and how they work. I deliver copiers and anytime we pick one up from a doctors office or government facility the hard drives have to wiped. I have been told that machines today can keep millions of past print jobs on the drives?

***** Like I said, there are digital copiers with integrated HDDs, but you have to tell the machines specifically to store a copy A quick check of the current corporate industry standards have the higher end units with three terabyte drives (some of the more absurd ones are actually installed with RAID arrays to ensure the images are safe) Millions of past copies? No. Not on any one machine 10s of thousands would be pushing it.

Clell Harmon I know from the security side that the buffers often keep the last x number of pages in network printers, I'm sure it's the same with digital copiers that work in a similar way. It eventually cycles over the buffers but some of them are rather large. So you may be able to get the last week's worth of data or so out depending on usage. But it's not infinite of course.

Ewan Marshall Not on a copier of this vintage. The image isn't really 'digitized' in any meaningful way. It's a straight through path from the optics to the organic drum, with only a minimal delay through the logic array. This model of copier does have memory, but only few pages worth (up to 20 if I recall correctly), and its plain old fashioned dynamic ram. Which means the ram reinitializes each time it's powered up... or the next duty cycle. Modern stuff, sure, you need to be careful. These >15 year old machines, not so much.

Yeah, I know, but you'll be surprised, that said, solid state buffers can be a problem to. And we have ways to maintain data through a power cycle of DRAM which takes hours for the data to naturally degrade fully and longer with tricks like the use of liquid nitrogen to cool it. Most computers do not actually wipe the memory on initialization just when they want to start using that page. Yes, it depends on the model as to how much of an issue it is. Finally, often a business the machine is never fully shut down so over the weekend a network attacker can often get to those buffers. Ideally one wants to be able to store the whole document in the buffer these days (scan once then correctly collate copies of multi-page documents, so those buffers have gotten bigger (to hundreds of pages these days) but even 20 pages can be a problem if that is medical records, bank records or financial statements.

This I got to remember. Going to disassemble two big copiers at some point.

jens jorgensen I would love to do that

Man do you still have those?

co co combo breaker LMFAO! I was about to comment the same thing! XD

co co combo breaker I think everyone who watched the video was ... WTF!!!

+co co combo breaker Unacceptable! Unsubscribed!

+co co combo breaker that was just a first step in investigation to get started with tear down

Comedy in a nutshell.

***** He pronounced it "apaaat".

PackratCND Next week we take apart the NASA control room lol.

+Noah Keck Or extra motors, sensors, gears, transformers of every shape and size, heck pretty much everything you might need hidden in that darn thing

Wrap-spring clutches go back many decades. Perhaps the Model 15 Teletype used them. The Friden Flexowriters definitely did. They often drove the load by one revolution and then disengaged. The ones I knew had springs wound with square or rectangular wire. They were lubricated, (but not likely with extreme-pressure oil!) When disengaged, the spring was held expanded to minimize wear. One end of the spring put some torque on the outer sleeve (spring inside), which was stalled by a pivoted pawl that was pulled out of engagement by an electromagnet. Power to the magnet released the sleeve, the spring contracted, wrapped, and gripped the continuously-rotating inner cylinder. Left by itself, the spring gripped the sleeve inside it. If the e. magnet stayed energized, the sleeve continued to rotate, and the spring didn't slip. If the magnet's power was cut off, its pawl-armature was ready to snag an outward projection on the sleeve. That made the spring expand, and the driven member stopped. However, inertia made the driven member overshoot slightly, and another pawl and "one-tooth ratchet" kept it from going backwards. That kept the spring expanded, minimizing wear. The driven shaft always stopped at exactly the same position. Incoming power rotated the cylinder inside the spring. Cylinder rotated on the output shaft, which extended the full length of the clutch. We called these single-revolution wrap spring clutches. They worked extremely well The Model 28 and later such Teletypes and the IBM Selectric typewriter used a different type of clutch, which had a few pawls inside a shallow cup with a cylindrical inside surface. Those clutches also had a pawl to "stall" the load and disengage the clutch. Cup drove the load. Releasing the first pawl used driving torque to engage another pawl, and as I recall, that second pawl made a third engage. The clutch simply did not slip! Stalling the first pawl made all three(?) disengage. HTH!

+William Blondel Gold!

+William Blondel Australian is a hard to understand language XD

+William Blondel And I thought text to voice was bad, heck voice to text is even worse :D

William Gerald Blondel it's really not that bad, I can understand him fine..

The only problem with older machines is the supplies, consumables and parts, which are not always easy to find.