Topics created by chris94

@dc42 Thanks for this clarification.
I'm currently using 2 motors because I originally had two limit switches which didn't work so well. that's why I wanted to switch to only one limit switch. The only problem was that I couldn't find a closed belt that was the length I needed. The chamber is heated (theoretically up to 120°C) and therefore I cannot use just any belt. I would also have to switch to a Nema 23 motor so that I can generate enough torque for both lead screws but I don't have the space for that. So, for me the option with the least effort was to use 2 motors which I then connected with the longest belt I could find.

As soon as I find the time, I'll try again with the current configuration and pay more attention to the belt tension. I probably made a mistake last time when connecting the two motors.

In your opinion, does it make more sense to use two limit switches or to connect both motors?

@droftarts said in Expansion board 1 stopped sending status:

Generally, endstops are only checked while homing, and the rest of the time they are ignored. Interference on these shouldn't be causing emergency stops or glitches, because they are not checked, unless you have them set to trigger for 'over-travel' events.

Yes I do have one as an over-travel safety endstop because I crashed the axis few time and that’s not really healthy on a double spindle driven axis. If I had been smart I would have installed it as an NC

I doubt you're using the probe during the print, and it seemed that it was the emergency stop that was causing the issue because it is specifically monitored all of the time. So I wouldn't worry too much about this. If you think it is causing issues, you could remove the configuration for it from config.g, and only configure it within macros that need to use it, and un-configure it at the end of the macro.

Thanks for the Idea. I will take a look at it.

If it is at a specific time of day, I'd guess it's an electrically-noisy heating or air conditioning pump turning on, something like that. You may get around this by putting a surge protector on the mains input, as the interference seems to be external to the machine. What time of day does it cause the switch activations?

Mostly it occurs at 6 o'clock in the evening but there have also been days when it has happened 3 times in a row in the afternoon. Unfortunately, my neighbours aren't very helpful when it comes to topics like this. For example, one of my neighbours doors has been squeaking for 2 years and they don't care (so I'm on my own). The surge protector is already on my list, but I still need to find a place to put it.

I think that the issue is solved for now and if the problem occurs again after I have implemented everything that was discussed here, I will reach out again. Thanks again for the help and for the ideas from both of you.

@dougal1957 I am currently using 3 Tools, 1 Bed heater and 3 separate chamber heaters (silicone mat). So, there are 7 and the one I want to add is for chamber monitoring.
How accurate are two silicone heater mats if I connect them together in series? Are there any problems with bigger temp overshoots or is this a usable solution?
@Nurgelrot I think that would be a bit overkill

@diy-o-sphere all the cheap ones are loud but the bigger problem is that there is no space for one. under the chamber is a filament drawer so its not possible to mount something down there. i cant put something in the top part because of the motion system. so the only place left is at the back between the side panel and the cabel cover (95mm)

@jay_s_uk So, everything above 100000Ω I guess? Anyway, thanks for the quick answer.

@chris94 no problem. you're welcome.

And just for the sake of completeness. Examples and instructions here: https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors