Need help to get Software Printing to work .. :(

[Chimm]

I have build: a conveyer belt, a pallet, a small product printer, a garage port.
Here are 2 images

Here is the order in the Distribution channel window,
You can also see, that the pallet says "currently used by nobody"
https://live.staticflickr.com/65535/51183749293_69e0c638b0_k.jpg

Here you see the status of the small printer: "currently off"
https://live.staticflickr.com/65535/51183532021_6ff704fecf_o.jpg

Question:
- What is missing to get this working?
- Does it need some input material? In Videos it seems that a printer is all you need and boxes just appear (from the printer).
- Do I have to turn the printer "on"? But I can not find any option to do so...

I am clueless and would really appreciate help from you!

[LatN's Strategy]

Do you have an application to print and if yes did you assign it to the printers?

[Chimm]

I found out what was wrong / confused me:

- The printer set-up was fine
- But, I ordered less prints than there were already in stock (at shops). So there was no reason to print more copies.

[LatN's Strategy]

Nice to know you were right in the creation and execution and realized the already filled orders. Check, check, and double-check!