Regarding ribbon not moving during printing on a Dymo LetraTag LT-100T with a variety of 12mm Dymo LetraTag label cartiges.
In my case when the cartridge door was closing it looked like it was clamping down the tape between the head and the motorised rubber roller.
In my case I had not used the printer for a couple of years at least. I think this caused one or more of the following of the following:
* Dust landing on the rubber roller.
* Rubber roller getting dry.
* Rubber on the roller drying up and cracking somewhat
* Tape getting dirty from all of the above
I think this has the effect of reducing the traction the rubber had on the tape. (If you try to pull the tape of out the cartridge by hand it's worth noticing that it requires substantial force. Therefore good traction is required. )
It looks like I used a combination of tactics to fix this.
In my case the lever operated b
In the first instance I thought the head clamp was not exerting enough pressure. I tried to address this by manual pressure on the lever operated by the cartridge door knob. This did not help. The tape was slipping on the rubber roller. I then decided to clean the rubber. For this I put vodka on the provo ides mini sponge brush. I typed single letter on the device and hit print while the sponge was pressed against the rubber roller. This probably cleaned off the dust but it left behind fragments of the sponge vrush on it. I then applied basic clear sticky tape (sellotape type) to pick up any remaining fragments from the rubber roller. Finally a put the cartridge in, closed the door and printed a single letter. Opened the cartridge door, pulled the tape out 5mm. Closed the door. Then repeated the printing and pulling a few times.
I applied one additional hack in order to increase the pressure from the print head on the roller. I applied 5 to 15 strips of sellotape to the cartridge door knob where it applies force on the printhead lever. I would exercise caution with this step. Don't add too many in one go. Also close the cartridge door slowly and pay attention to the door hinges and the pressure required to click it shut. Remove layers if too much pressure is required or it looks like the hinges are popping off.
If you asked me what made the biggest difference, I would say it was to very patiently clean the rubber roller of all dust particles. In this I think the alcochol spirit helped as a cleaning agent.
Repeat at your own risk.
Good luck.