Topics created by o_lampe

I thought of coloring some easter eggs, but regular patterns require CNC control and a rotary device. Even when using laser cut motive masks it's hard to control by hand.

I got inspired by the felt pen easter egg plotter

Here are some hypothetical questions:
Can I run CNC-router and laser engraver at the same time?
Can I have a separate DWC screen for each tool/gcode stream?

@o_lampe How tall is tall?

I have found that ABS printed in vase mode works OK without a heated enclosure, but line width matters. I've printed with a 0.4 mm nozzle up to about 250 mm high without problems.

If you try to print a very tall object with a narrow line width, the object will distort because of its own weight and eventually the nozzle will miss the previous layer.

If you try to print a vase with straight sides (like a tall rectangular shape) the sides will be wavy due to the plastic shrinking as it cools. Curves are best.

@dc42
the math they use calculates the leg(s) length first and then replace that by the required servo angle and even the microseconds for PWM duty cycle.
That's the point where it gets specific and needs new formulas. Either for industrial servos or for Deltastyle tower arrangement with steppers.

Beside that difference it's quite the same: both systems have a fixed base/frame and a moving platform connected by six rods.

@droftarts said in can't find my "watched" topics anymore:

but you can chiose what you see in your profile > settings > select a homepage

I found that after about 5 minutes of "troubleshooting" 😄 and switched it to "Recent".

You can also switch it to German, which I tried, but then immediately changed again.
The forum software then displays everything in German, but of course the comments remain in English.
The problem is... My translation plug-in no longer asks me if it should translate the page into German, because it's in German. 😬
And since I can't get the icon to translate the page, I had to switch it back to English.
But it's OK like that. The few things that are then displayed in German will not get you any further.

Google Translate
-- Original Text --

Das habe ich dann nach etwa 5 Minuten "Fehlersuche" 😄 auch gefunden und es auf "Recent" umgestellt.

Man kann es auch auf Deutsch umstellen, was ich ausprobiert habe, aber dann gleich wieder geändert habe.
Die Forensoftware zeigt dann alles auf Deutsch an, aber die Kommentare bleiben natürlich auf Englisch.
Problem ist dabei... Mein Übersetzungs PlugIn fragt mich nicht mehr ob er die Seite auf Deutsch übersetzen soll, weil sie ja auf Deutsch ist. 😬
Und da ich so nicht an das Icon komme um die Seite übersetzen zu lassen, habe ich es wieder auf Englisch umgestellen müssen.
Es ist aber OK so. Die paar Dinge die dann auf Deutsch angezeigt werden, bringen einen nicht weiter.

@o_lampe
Even better?
The Z-tower Rod distance only 20mm wide, because the passive tower is still ~90mm wide
parallelogram20.jpg

@o_lampe so a polar (rotary bed) machine is effectively a bed slinger, so independent towers would just allow ditto printing IMO. However you would need to be able to do mesh adjustment for each tower for it to work given each tower would be in a different sector of the bed.

All the best
Barry M

@dc42 That's cool, since my request was about idle extruder motors and their parking axis' motors. IDEXYUV, like my hashprinter

@o_lampe See the stepper.num5160Drivers board.txt entry, you basically tell the firmware how many of the smart drivers are 5160 based. You will also need to configure the stepper.spiChannel entry to tell the firmware which spi channel to use to talk to them. You will also need to set the jumpers on the board appropriately. The 5160 drivers must be the lowest numbered drivers, so if you have 3 5160s they must be in slots 0, 1, 2. Sorry I don't have access to my super8 configuration at the moment so I can't supply the specifics.

@t3p3tony
Thanks for the tipp! For Delta Calibration I would apply the common kinematics and then switch over. I could try that on my Delta printer...

//edit Would also be nice with a conveyor belt: engraving/cutting long work pieces

@oliof not arguing at all here. Just trying to find the cause here as obiously some BS on my stock W11 install is blocking scripts...

@gloomyandy
Yes I've read that thread. It retriggered my interest in laser-stuff, which was gone due to diode laser issues.
If I understood the second video correctly, their ppi is directly connected to the (X-)stepper pulses. E.g. at 500ppi every other stepper pulse also fires the laser. That's equally simple and elegant, IMHO.
No need for extra timer routines etc.

Yesterday I received my (NOS?) K40. I bought the classic version with analog amp-meter, because it was cheaper and the digital power control from the upgrade version had some negative comments.
To my surprise, it came with a functional Chassis-GND connector and has a Lid-switch to interrupt the laser, when Lid is open. Those were two items on my todo-list I could check immediately.
But best of all is the fact, that it came with a real 700mm tube, manufactured march 2021. 🎆
I read that most K40 only have a 650mm tube, so it was an extra bonus for less money.

To answer my initial question, the room below the laser table is ~80mm, just not enough for big coffee mugs I'm afraid.
I've read about different lenses with much shorter focal point (1.5" vs. default 2") and there's also a chance to reduce focal length 4mm by turning the 2" lens around, so it's a close race.
I might just cut out the bottom at some place if need be.

@mendenmh
That's right, I could do the gcode conversion in python. I thought ' I'd have to send them from a Java plugin, but a simpe macro call would do.
I wouldn't care about layers or infill, since the ball(s) of a sand table just meanders around, carving pretty patterns.
Thanks for the tip.

@o_lampe said in [M118] How does *send HTTP message* work?:

, but when I try to send a message back to the DWC consol

In my understanding, DWC runs on Duet on a http server (on the ESP8266 Wifi chip), so it needs to be addressed by http and the address is localhost if the program runs on Duet (or Duet's IP address). For special functions, wilriker's program may be useful also: https://github.com/wilriker/rfm

If you want to integrate ESP32, Smuff https://github.com/technik-gegg/SMuFF-Ifc may also be interesting. However, I would try to use SPI, because it's more stable than I2C, if possible.

@hlwerschner
Not much I'm afraid. I wanted to engrave some acrylic strips and animate them with NeoPixels. But i got so distracted by commissioning and upgrading the new Co2 laser, that I almost forgot, why I bought it 😉
In the meantime, I stumbled across a four color LED strip, which looks quite nice, too.
Now I'm trying to figure out, if designing a 4-fold NeoPixel LED strip would be possible. So I'm looking into the smallest possible footprint of programable LEDs.
4-colorAcryl.jpg

I should mention, that this isn't my work. I found it on a discord channel about the K40-laser from the member @raineroe

@dc42
Cool, I already have larger Delrin balls from an earlier experiment where I put two rods on one ball.
How much safety margin is in the mag-arm holding force? I never had an accident, even with a direct drive extruder at 4000mm/s/s acceleration.

@pcr

thanks for linking. we have some in our range:

https://www.cr3d.de/produkt/hotend-kuehlkoerper-v6/

@o_lampe you can use the emf calculator here. plug in the motor details and see what the different voltages allow:
https://www.reprapfirmware.org/emf.html

@o_lampe assuming that you don't have a DueX connected to the Duet, RRF will know that they are not TMC2660 drivers. Just configure the microsteps/mm value in M92.

I almost forgot I've started the thread. I remember I found the firebeetle M0 from dfrobots which is similar to the RP2040, but has "12MB* U-disk flash drive.
Could've been good for accelerometer data recording or more complex NeoPixel LED stuff.
But now that there is a semi-official CAN-FD implementation based on RPi's state machines, I think it's the route to look further.

@t3p3tony Thanks, I'm in now! (obviously 🙂 )

@joergs5 I had a similar idea, when I saw the RasPi Pico (RP2040) it has several SPI channels at 133MHz and could also act as Co-Processor or toolboard