How do you load the spool of labels, can I see a diagram?

Does the wind handle lift up like a 35mm camera? Or, some cameras you can just push the bottom end of the spool down and release the top end of the spool.

This camera uses 35mm film, not APS film. 35mm is a larger format, giving MUCH better results, at the expense of having to manually pull the leader across to the take-up spool each time you load a roll.

Here's a video that shows how to properly load supplies into the gun. It's possible that the supplies aren't loaded properly..

http://www.racoindustries.com/monarch-1130-1131-1136-labeler-loading-video.htm

It does look a little strange inside, but here's the manual:
http://tinyurl.com/yb2rpd4

Loading the Media, p 12
Loading the Ribbon, p 17

Be sure the ribbon comes off the spool clockwise, and the labels come off the spool counterclockwise. Look carefully at the pictures in the manual and you should be able to load it ok.
Also be sure to close the printhead (the purple handle that holds down the ribbon and labels) to the 6:00 position when you're done. Then close the covers, turn it on and try it out.

Hope this helps you! If so, please leave a rating.

I loaded defaults, then set it to Rewind, saved settings as Permanent and it worked

Follow the arrow symbols stamped on the ribbon spool assy

http://www.scanonline.com/Online-Store/ZM400-600

Download the ZM400/600 Quick Reference Guide on the right hand side of the page. They have a diagram on how to load labels.
There should also be one inside the printer - printed on the back wall...

Check the film pressure plate in the back door whether it has proper pressure and in proper position.

Whether the film lead is dragged up to the required length and its perforations are correct without any damage.

Pull slightly the film and rewind it by hand to check its spool rotating freely
Then it needs service

"The printer will print one label then either push out a half a blank label or several blank labels. At that point the labewriter thinks it's out of paper. I also noticed that the labels tend to slide toward the middle while exiting. After each print I have to pull the labels back in and realign them. Then the process repeats."
This is because you haven't squeezed both sides of the spool to the edges of the label. Without the sides to hold the label in place it is free to slide about on the spool and therefore slides about where the print head and label sensor are. The sensor is on the left, so if it slides towards the middle the sensor can't see the label and reports "out of labels".

See the diagram here for a clear picture of how to correctly load the labels to avoid this problem:

How to load Dymo LabelWriter Labels

I have WiFi Zebra QL420. In my case a simple header label prints fine then the complex label (many fields, barcode, lines & boxes) gets stuck. Labels are in separate spol files. We have many other labels printing fine, just this one ALWAYS gets stuck.
If I send same data from PC to printer it works fine.
I can see with ethernet sniffer that header label data goes but complex label doesn't even leave the iSeries. My sniffer is too crude to tell me what LPR level protocol is saying.