Posts made by o_lampe

I have at least three symbols on my keyboard looking similar:

'  ` ´

Just wondering if it was a typo error? But then the FW upgrade seems to work, maybe it's more typo-tolerant ?

@Pertti I think btncmd (buttoncommand) is the better option for you.
AFAIK, you can build your own control screen and control Duet2 via buttons and sliders

@drivetrainsystems
Also use B and C values :

Additional parameters for linear analog sensors

    Fn F0 = unfiltered (fast response), F1 = filtered (slower response, but noise reduced and ADC oversampling used to increase resolution). F1 is only available when using a port intended for thermistors, not when using a general input port.
    Bnnn The temperature or other value when the ADC output is zero
    Cnnn The temperature or other value when the ADC output is full scale

@edsped IMHO it wasn't false alarm.
I guess, when you started a new print while the fans where still running in thermal mode, they disappeared?
Although you reconfigured them to direct control at the start of the print?

Or was it the other way round?
Nevertheless, the fans (and DWC) should act the same in both scenarios.

@rqthree Nice find!
I started looking for a wood lathe and the turning tools I'd need and guess what I've found:
Wood turning Tungsten carbide round cutter
They come in different sizes from 8.9mm to 16mm dia. A set of 10pcs is ~18€ which would be a lifetime supply for our usecase

@lorenjz I'm sure it's possible.
I have built a 4-head printer and tested mirror mode on all 4 tools.
IDK if I used the official way of doing it, but by juggling with:

• redefining the endstops,
• reversing some steppers direction,
• modifying the printer kinematic-definitions and
• setting tool offsets,
  I had a working solution.

@gnydick Nice idea
It could easily be adapted to

• pause print
• cancel print
• shutdown power

Just wondering, if it could also debounce the pushbutton for the first usecase

@fšk If I understood you correctly, you want to use the dials to find the right tool-parking path's and end positions?
But the panel doesn't show the actual position? Is it on a separate screen?

@Tinchus @dc42 I think, his intention is to constantly measure the slightly uncontrollable flow and change the printspeed instantly. (good bye planner queue)

@JoergS5 said in Can this 5-axis FDM be configured with RRF?:

built as spherical, i. e. the three axes cross in one point.

Just out of curiosity:
This crossing point is necessarily the tip of the nozzle? Or nozzle + layerheight?

@dc42 Just wanted to chime in with my 2 cents worth opinion:
The magnetic sheets used for build plates often have alternating magnetic polarisation. Like the one I use for my capacitive probe.
I never had a problem with that, but the SZP might.

@MihaiDesigns Pre-processing such a big part of a sliced file will mess up the extrusion calculation, too.
Unless your slicer already knows about the extra axes and it's just RRF that needs to be altered.

@NineMile Last time I tried, you could use sensorless homing/stall detection on any axis.
But you are right, you'd have to reduce motor current for those moves, but at the same time it needs a minimum speed to be succesful.
I wouldn't like to see my 50$ router bits crashing in a clamp.
Maybe a regular endstop-config would be a better choice? When the routerbit itself gets electric contact to the metal clamp it doesn't wait for so_many missed steps to trigger alarm.
@gloomyandy That kind of metal2metal contact probes would trigger in any direction, but you wouldn't know where the obstacle is. No problem for an emergency-stop IMHO

@Ralms instead of relais and optocoupler you might find a simple inverter/driver chip with optocoupled input in the good'ol 74hcxxx series.

For people not having that touchprobe thing, would it help to use modified "sensorless homing" moves as crash protection?
You'd check for contact , but don't set coords to whatever your homing coodrs are

@jay_s_uk I was about to edit my reply, because maybe the TS wants to use IO pins from the MCU directly?
In that case I wouldn't draw more than 2mA from each pin.

@Ralms said in Drive standard LEDs. What is the max current rating of IO pins?:

All 3 LEDs are built-in in the button, they share a common ground

Maybe you get more trouble from the fact that they share GND?
AFAIK all MOSFet IO-ports on Duet boards switch to GND and that wouldn't work for you.

@juanggrados You might be able to still use the board with low current steppers and using an external bed-heater power supply controlled by SSD-relais.

@Phaedrux said in fatal accident on my duet 2 wifi:

Bare wires have a tendancy to migrate and deform over time

Even worse, when soldered...
Over time even solid copper wires get loose under static pressure of a screw terminal. That's why we use springloaded push-in terminals in house electrics.

@Panzotom Your project sounds interesting, but are you sure you can control the robot with only one motor?
Even when you use the chain sprocket to drive a two-wheel chassis with a third (caster-) wheel, it won't drive a straight line on rough ground.

If I'd build this, I'd use two independent drives at least, maybe controlled like a tank.
I have experimented with brushless motors from used hoverboards. They are cheap and have hackable controllers, which also work with step/dir signals like a stepper.
The main controller could be a Duet board with extension port (Duet2 WiFi would be my choice)

The hoverboard tires can be replaced with tires for rough terrain. ( If I find the links, I post them later)

A good starting point might be EFeru-github or SimpleFOC (they have implemented a step/dir interface)