Seems to be an LCD display bug that changes the Speed setting
On my brand new MK3S with 3.8.0 firmware I've found that I can spin the control knob and speed up the scrolling of the file name to read parts of it instead of waiting for it to slowly scroll. However, while doing this for a little while I've discovered that at some point it starts changing the >>Speed number. This is without clicking the button or scrolling through the menus to get to that setting. It's from the main information screen and it seems to do it at some point of the filename scrolling acceleration by only spinning the knob. No clicking.
This probably isn't intended behavior. I found the github site for reporting bugs and posted this. I did a little searching before that and didn't find anything similar.
RE: Seems to be an LCD display bug that changes the Speed setting
If you mean that you spin the knob while a print is running then that is supposed to change the speed setting. It allows you to alter the print speed that was set in the gcode. But perhaps I didn't understand what you are seeing.
RE: Seems to be an LCD display bug that changes the Speed setting
Turning the knob during a print will let you easily adjust speeds. Any impact on scrolling is likely unintended. Note that the speed adjustment is maintained in the printer until manually adjusted, reset in gcode or by a power cycle. This has the same effect as issuing M220 gcode commands to the printer.
RE: Seems to be an LCD display bug that changes the Speed setting
When I spin the knob the speed doesn't change for quite a while. The display scrolling is immediate. It takes many seconds worth of knob spinning before the speed starts changing on my machine. That's why I didn't know about the speed adjustment feature you mention. It doesn't seem to work that way on my new machine until you've spun the knob a lot. I just stumbled onto it because I was playing around with the filename display.
Now it sounds like I have a reversed bug from what I thought:-)
I thought you had to go into the menus and get to the speed change under Tuning. That's where I've done it when I wanted to.
RE: Seems to be an LCD display bug that changes the Speed setting
Use of the knob to adjust speed is well documented. I suspect they require a bit of "warmup" spin to avoid inadvertent bumps. That, or the 8 bit CPU takes a bit to catch up.
RE: Seems to be an LCD display bug that changes the Speed setting
OH, now I see. If I spin the knob about 3/4 of a turn it does what you say. I was going several clicks at a time and nothing was happening until after quite a while. You have to crank it a little to wake it up and then it does the speed change. I wonder if mine has to do with the mile long filenames I've been using.
I did read the entire handbook that came with the printer and they show the Speed control being under the Tune menu. Elsewhere in the text they talk about turning the knob to adjust the speed and I assumed they meant doing it under that menu. Going back and re-reading it see it can be read as not needing the menu....
Live and learn. I probably confused someone by posting the thing on github, but I suppose that happens a lot.
RE: Seems to be an LCD display bug that changes the Speed setting
I closed the issue on github. Trying to clean up after myself and be a good little electronic citizen:-)
RE: Seems to be an LCD display bug that changes the Speed setting
OH, now I see. If I spin the knob about 3/4 of a turn it does what you say. I was going several clicks at a time and nothing was happening until after quite a while. You have to crank it a little to wake it up and then it does the speed change. I wonder if mine has to do with the mile long filenames I've been using.
Heh. I use very long names myself, so know what you mean...
Whiteboard Marker Holder v9 SPEED PLA 0.15X0.4 215-215 60-60.gcode
I do wish we had a bit more control over what is displayed at print time. That long name scrolling isn't overly helpful and I don't usually forget what file I'm printing. The memory space on the Mk3 is apparently very constrained, so I suppose it's best Team Prusa focuses on core functionality.
I did read the entire handbook that came with the printer and they show the Speed control being under the Tune menu. Elsewhere in the text they talk about turning the knob to adjust the speed and I assumed they meant doing it under that menu. Going back and re-reading it see it can be read as not needing the menu....
It's a lot to absorb, especially if this is your 1st printer. It took me a week or so to realize I can raise Z by pressing and holding the button. Wasted a lot of time at the end of each print fiddling with menus. 🙂
Live and learn. I probably confused someone by posting the thing on github, but I suppose that happens a lot.
Nah, lots of stuff like that shows up. You did the right thing closing it. I'm sure the devs don't worry about the closed items much.