Tried a search for this but not finding anything exactly like this issue.
Since the last firmware upgrade the printer emits a tone for about 25 seconds at the start of a print job when initially warming the bed the again when heating up to the set temperature. The temperature is lower than the max temp for this printer.
It doesn’t stop the print but it is extremely annoying. The only search results I have found relate to attempting to set a bed temperature over 100 C. I generally use PETG HF which uses a bed temp of 70 C so this shouldn’t trigger the max temp warning.
If this is a new 'feature ’ in the firmware then I would definitely want to revert back to a firmware that doesn’t activate the sounder. It’s either that or removing the sounder from the PCB.
Is there smoke or an acrid smell? If not, don’t worry about it.
All kidding aside. In the 1.06 firmware, there is a resonance frequency calibration that was not present in the earlier firmware although when one does a calibration from the control panel, one hears this being done as part of the initial calibration. To make sure we are talking about the same thing, go to the panel and perform the 20 minute calibration. What you will hear is a progressive increase in vibrational tone. If this is similar to what you are describing in the startup sequence, then we are talking about the same thing.
To disable this, you can go into the printer profile and comment-out or delete the lines that perform this calibration and save it to a new profile as I have done here. This also speeds up the prep time especially if you also reduce the purge values which is not necessary in a single color print configuration.
Thanks for the input but it has nothing to do with resonance calibration. It only sounds when switching on the bed heater. Once on the pre-heat to around 50c then shuts off when the temp gets to within a few degrees then a second time when the bed temp is then set to the filament bed temp (70C for PETG HF).
On each occasion the sounds lasts for around 20 - 25 seconds, is somewhere close to 1 to 1.5 Khz, is very piercing and extremely annoying.
I can deal with all the calibration sounds as they are lower frequencies and not as piercing.
I recently had to disconnect everything to have some work done in the room I have my printer. It turns out I had used the wrong cable in the printer. The device that should be plugged into the UPS wasn’t.
I never even gave that a thought so thank you very much
Yeah, After the work had been completed I turned the printer on and was immediately greeted with the new firmware message so I let it upgrade and then afterwards the noise started. If I hadn’t done the upgrade I might have looked further for the cause of the noise. How coincidental that a firmware upgrade was issued between me safely putting the printer away ready for some serious work to the house and getting it back in place a couple of days later.
Thanks for closing the loop and letting the community know of your success. This greatly helps all of us as we aren’t left hanging and learn something new.
