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NaitLee / Cat-Printer

Application supporting Bluetooth thermal “Cat Printers”, for everyone!
GNU General Public License v3.0
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Suggestion: Paper feed adjustment #82

Open matrixes opened 1 year ago

matrixes commented 1 year ago

https://github.com/NaitLee/Cat-Printer/blob/9a29e401fcf9c004c2b949ffd5fae4be679fcd95/printer.py#L471

I have a GT01 printer that has the problem that if I set self.feed_paper(128) the bottom of the print is missing when tearing of the paper. If I set it to self.feed_paper(256) there is a lot of whitespace after the image which wastes paper.

Is there a way to control the feed length more precisely?

NaitLee commented 1 year ago

The feeding was known to have problem on some models. At the moment you can add GT01 to here to workaround it.

As stated in #78, the code base will be refactored or rewrote in the future, prior to that I couldn’t add new features and release new versions.

And… I want to know if my new web app for cat printers works for you, especially the feeding behavior. Please test it: https://print.unseen-site.fun/

matrixes commented 1 year ago

I did two tests

Modifying models.py

This gave the same result as setting self.feed_paper(256).

Testing https://print.unseen-site.fun/

This gives the same result as the default; It does not feed enough, so that when tearing the paper the image is cut off at the bottom.

If it would be possible to have a setting for X length of extra feed, that would be preferable for my use. That way I can make adjustments for each print.

NaitLee commented 1 year ago

I suspect I didn’t implement “feed” protocol in a right way. I didn’t had time to check it, though.

There’s the same problem for some other models.

It’s time for me to look back to other cat-printer projects that helped me. I’ll let you know if I made progress.

NaitLee commented 1 year ago

I forced feed length data to be 2 bytes, as in other implementations, in the web app. (it’s codebase is new and easier to change)

If it works then we found the solution.

matrixes commented 11 months ago

I tested https://print.unseen-site.fun/ again and the feed works much better! Is there any way to run that code locally? As far as I can tell it works well enough for me.

NaitLee commented 11 months ago

I “back ported” the possible fix from the rewrite code to main branch.

You may give it a test.