Topics created by Mike

I could also have the kinematics calculated outside and just feed the GCode as if it was a simple Cartesian axis. But then it'll be really hard to home the extra axes. I'll probably just stick to Cartesian if I decide on running everything from a single controller.

@t3p3tony It's https://duet3d.com/DuetAddons/MagBallArms360. Links for extras in the text lead to "www" pages.

@mike, according to my measurements a hexagonal plate that is 303mm across flats would just cover the horizontal extrusions without overlapping them. As the extrusions are 20mm wide, the mounting screws would need to be set 10mm in from the edges. Caution: these figures may be 1mm (or more out).

What I meant to say was that all stepper motor driver chips include flyback diodes. They are built into the output MOSFETs.

There is a section about protecting drivers on the TMC22xx datasheet.

@alex-cr said in Amazing use of Duet electronics by E3D:

I am fortunate enough to run a brand new Stratasys F370 at work. The hotends heat mind blowingly fast. They will heat from 20C to 250C in less than 50 seconds. It is crazy when they first start, they will rise almost 10C a second until 150C. I thought my 40W cartridges were fast.

I dismantled an old broken Stratasys Dimension Elite: it was using 2 cartridges, 200W each -> 400W! Sure, it can eat up fast ;o)

@wilriker said in Fan tachometer input:

Maybe a stupid question or something I missed in the wiki but how do you even connect the signal wire when there are only two pins for fans in the first place?

The fan tacho output can be connected to PB6 on the expansion connector via a diode (cathode to tacho output). It will only work reliably if used with a 4-wire PWM-controllable fan.

Ah, makes sense, thanks. 10 mA was for 12V I think.

@dc42:

@DR8:

I know Duets supports M83 (relative extrusion). It's written in the wiki also. I usually work with Cura witch do not support M83 but M82. The thing is that I achieve great print result even if I slice with absolute extrusion. The problem of the extruder spinning really fast is present only If I run the ressurect.g. That's because ressurect.g will be created with the default extrusion mode of the slicer. In Cura 3.0 there is an option to enable relative extrusion. Even with this option enabled, the ressurect.g will be created with M82 witch will make extruder going crazy after running the file. I've tryed also to insert G92 E0 in my ressurect-prologue.g but again, extruder is trying to extrude (not to retract) very fast. So my question is: There's no way of making Cura support relative extrusion? Is there a way to use the power outage protection function with slicers with are not supporting relative extrusion? Because in this case, this feature has some limitations.

Resurrect.g contains M82 or M83 depending on what was actually in use at the time of the power failure. At least, that is what the code is written to do, and I've reviewed it once already. Please check your files as as asked in my previous post and report what you find. I can't identify a possible bug if you do not provide the information I ask for.

And I repeat, to get the extruder spinning fast you must be printing a file that was sliced with absolute extrusion but the printer must be in relative extrusion mode.

Yes sir, I have re checked everything. And my problem was that in the Cura I had set Marlin flavor instead of RepRap flavor as I write in the comment above. When I discuss and type in topics, alot of ideas comes to my mind and then I go and change/check everything and maybe I find the solution as was in this case. But sometimes I'm not so fast to type the solution in the forum. Thanks alot for the help. Now, the question is how can I make to save the ressurect.g file to the SD card or in macro folder so i can resume the print from LCD instead of connecting trough web interface. Now my ressurect.g is saved inside the sys folder.

For those who will read this and have extruding problems, make sure in Cura 3.0 to have Relative Extrusion enabled in the Special modes category. And more important, on the machine settings don't forget to use RepRap flavor.

You can connect the SSR control terminals between the expansion connector pin and +3.3V.