Search found 1085 matches

by ednisley
Fri Jan 17, 2020 3:28 pm
Forum: M3-ID
Topic: calibrate new hotend
Replies: 2
Views: 25

Re: calibrate new hotend

a new hot end installed Start with simple calibration squares to set all the basic parameters: https://softsolder.com/2016/04/05/thinwall-and-solid-boxes-for-3d-printer-calibration/ You don't need to use my squares, but you should start with a thinwall square, not a complex object. The process I wr...
by ednisley
Tue Jan 14, 2020 11:49 pm
Forum: Tech Support
Topic: Bed Not Heating M2 Rev. E
Replies: 19
Views: 236

Re: Bed Not Heating M2 Rev. E

If the little light doesn't light then the bed won't get hot. Well, it's worse than that. The LED indicates the voltage difference between the (platform) power supply and the MOSFET drain terminal. When the LED is dark, the MOSFET is supposed to be OFF and conducting no current. When it's lit, then...
by ednisley
Sat Jan 11, 2020 2:14 pm
Forum: Tech Support
Topic: Bed Not Heating M2 Rev. E
Replies: 19
Views: 236

Re: Bed Not Heating M2 Rev. E

replacing the MOSFET was cheap and easy and worked great The force is strong with this one … what might have been troubling this thing? That uneasy feeling generally happens when I've done a great job fixing the symptom, but haven't found the real cause. It could be "one of those things", but, more...
by ednisley
Wed Jan 08, 2020 11:20 pm
Forum: Tech Support
Topic: Bed Not Heating M2 Rev. E
Replies: 19
Views: 236

Re: Bed Not Heating M2 Rev. E

Is this possible? Nope, barring unfortunate events like power glitches and component failures. When a MOSFET is OFF, it's not conducting any current and dissipates no power. Conversely, when it's ON, there's (essentially) no voltage across its terminals, so it's (ideally) dissipating no power, eith...
by ednisley
Tue Jan 07, 2020 8:10 pm
Forum: Tech Support
Topic: Bed Not Heating M2 Rev. E
Replies: 19
Views: 236

Re: Bed Not Heating M2 Rev. E

Can I replace just the mosfet or is that a symptom of a bigger problem? Given that picture, yeah, things look grim in there. The fuzz is normal, but the MOSFET looks like it's been way too sweaty. The MOSFET is firmly soldered to big copper pours on both sides of the PCB specifically designed to su...
by ednisley
Tue Jan 07, 2020 7:59 pm
Forum: Getting Started
Topic: Getting started with linux mint?
Replies: 3
Views: 105

Re: Getting started with linux mint?

running my m2 with linux mint Although I did that for quite a few years, it's a whole lot easier to install Octopi on a dedicated Raspberry Pi, configure it once, then control the printer from any PC / phone / tablet on your local network with no further hassle. Basically, I do all the modeling & s...
by ednisley
Sun Jan 05, 2020 3:42 pm
Forum: Tech Support
Topic: Bed Not Heating M2 Rev. E
Replies: 19
Views: 236

Re: Bed Not Heating M2 Rev. E

heat LED turns on and connector outputs 24v Excellent troubleshooting! The heater cable connector on the RAMBo has pins for the +24 V supply and the MOSFET switch; when the MOSFET turns on, it connects its pin to "ground" = 0 V. As a result, a multimeter across the connector will read 0 V with the ...
by ednisley
Sat Dec 21, 2019 2:25 pm
Forum: Tech Support
Topic: Filament Drive Pinion gear slipping on shaft
Replies: 6
Views: 177

Re: Filament Drive Pinion gear slipping on shaft

a complete unit purchased from china To a good first approximation, all electronic & electromechanical components come from halfway around the planet. That's a rant for another time, but just the way things are. slide on with finger pressure Yeah, that one's dead. If you don't have trouble ramming ...
by ednisley
Fri Dec 20, 2019 1:43 pm
Forum: Tech Support
Topic: Filament Drive Pinion gear slipping on shaft
Replies: 6
Views: 177

Re: Filament Drive Pinion gear slipping on shaft

just use CA rather than locktite Cyanoacrylate adhesives are brittle and have poor shock resistance, which the pinion desperately needs. Threadlocking adhesives tend to be more resilient, although high-strength versions set hard. However, if the pinion has worked finger-loose, then no adhesive can ...
by ednisley
Mon Dec 02, 2019 3:14 pm
Forum: M3-ID
Topic: No Power Switch?
Replies: 3
Views: 209

Re: No Power Switch?

can't find any way to power it down short of unplugging the main power 'brick'. Page 14 of the M3-ID User Guide ( https://cdn.shopify.com/s/files/1/0030/7372/files/M3-ID_EN_CE_Final_2.pdf?16795155840968660542 ) shows how to shut down the Raspberry Pi running Octoprint before you click the power str...