pam on Nostr: If you‘ve tried to fix your laser printers, you would have spotted several parts ...

If you‘ve tried to fix your laser printers, you would have spotted several parts like rollers, brushes and a tiny mirror when you open it.
Static electricity might seem to have limited use-cases, but laser printers make the most out of it.

When you send a doc to print, your pc sends a signal to the printer. A laser beam is directed to a mirror and will trace out the words you typed. This mirror is reflected to a cylindrical drum which is coated with light-sensitive material (like selenium). The areas where the laser hits the drum become negatively charged.

Next to the drum is the toner filled with powder. It has a brush and when it rolls on it, it becomes positively charged, and is attracted to the negatively traced out words on the drum.

The paper then passes through, where the toner powdered words are transferred to it and finally will be heated up to melt the toner and bond to the paper - before it comes out of the printer.

Man so many things going in there - I have never been able to do a major fix for a printer - this has become a painful use and throw situation.