Topics created by digiex_chris

@digiex_chris:

nope, my other machines use a 3dator style extruder (fixed tension rather than spring loaded). My first indication that I hit any kind of limit was infill not able to run a complete line across the interior of the part (rectilinear infill).

Then I would suggest that the Titan extruder is the reason why you are not seeing under extrusion manifesting itself in the same way as your other printers. I'm having exactly the same issues with the tests I am doing on my Diamond hot end with Titan extruders. I'm trying to ascertain the maximum melt rate by pushing the print speed higher and higher. I'll be doing a write up on my blog with accompanying videos when I've finished so I don't want to say too much until I've finished all my testing. However, I can say that I am finding that there is no clear black and white distinction as to when I've reached the limit of how fast the filament can be melted. Rather it seems to be a gradual "thinning" of the filament bead as I continue to push the speed up. Eventually, there will be distinct ripples in the surface but I don't get much in the way of "clicking" and no sign at all of any grinding of the filament. These damned Titans just push and push. It's actually quite annoying for what I'm trying to do. 🙂

yup, all 5 crimped onto the insulation instead of bare wire, by the supplier.

im using the pi for the webcam and got it to work finally. right way up now

sudo killall mjpg_streamer ./mjpg_streamer -o "output_http.so -w ./www" -i "input_raspicam.so -fps 30 -rot 180"

the -rot parameter is adjustable of course

I'm also wanting to help protect people that buy cheap printers that have too powerful heaters and don't know better than to solve that. There are use cases for this feature than just the people printing high temp stuff.

2 fets in series doesn't solve it either actually. You won't have any indication that the first has failed and latched into the on position, and will keep on using your backup. The second can then do the same maybe years later. A good safety valve needs to 1) work, and 2) let you know that it worked.

Cartridge heaters are not the only heaters in use on printers. The bed won't reach autoignition temperatures for the filament, but it can cause other effects like breakdown of insulation and release of adhesives which can then grow into a bigger problem, with the heater not heatsinking into a big plate. Bed mass is a necessary function of the flatness and rigidity that I'm going for over about 2 square feet. I can share my CAD simulations if you like but justifying my choice in heater wasn't really the point of this thread. Stopgaps aren't either. Again, you're suggesting I do a bunch of machine rework on an already excellently performing machine as a stopgap measure.

The more obvious stop gap measure is to go back to a board that has this feature that I already have in stock, but I actually like the duet and I'm hoping we can help more people than just me!

A nice bonus would be to pause the host, turn off the stepper drivers, and turn off the remaining heaters too.

You need to supply 5v power to make best use of an atx supply anyway, how else will you turn PS_ON on? It can just stay in memory till retrieved. That's a far lower technical hurdle for people already using atx power supplies.