That way to define different tools sound reasonable and good. I just defined a second extruder where I connected my laser to th step signal. As expected is is normally off. When I move the extruder (extrude) light goes on. The problem ist, that ven though I have set extrusion rate to F6000 and 999 steps/mm, still the power is too low. I tried to increase the "Delay stepper high signal" to 5 µs tovon karl.ranseier - Laser Cutter Working Group
I like this idea very very much. I would suggst to extend it for grayscale images. First idea: For this one needs to modify the "Extrusion" to the intensity of the grayscale image. I have never tried to 3D print in multicolor, especially not with a mixing extruder ( , ). However, I think this could be an "easy" way to for grayscale laser burning. In my rumbaboard I can connect 3 extruders. Ivon karl.ranseier - Laser Cutter Working Group
Sorry for the long time for the answer. The voltage was always ok. Meanwhile I have changed the drivers to Steprockers. The problem is gone. To be honest, I think it was NOT a problem of the drivers. More probably I have done anything else wrong, which is now correct after reassembling everything. Thanks again for your help.von karl.ranseier - Controllers
Do you think it will be conctantly <5V or just in the moment when it stops? I will try to measure it, but my oszi is very bad. With an older rumba board I damaged the regulator when measuring, so I will take more care ;-). A cable connected to 5V was for some ms on a random place of the board and immideatly the regulator smoked and later burned (now I do have a smoke detector!). The positivevon karl.ranseier - Controllers
Solved! I had set my micro stepping to 1/32 resulting in 1280 steps/mm. At a speed of 40 mm/s that was eventually too much. I do not understand why the board restarts then, but I will accept it :-) edit: the question is why this did not happen before...von karl.ranseier - Controllers
I have changed my wiring so that I can really fast change between series and parallel configuration (thanks to WAGO). In series configuration the motors are less noisy. It seems to be good. Speed tests have to be done later, because: The original problem still exists. The rumba-board sems to switch off during motion with two motors. It is really during the motion and not at the end. I have onlyvon karl.ranseier - Controllers
Thanks for that hint. That's a good thought. I forgot to mention the driver: I am using the DRV8825 (added it in the first post). I do not drive them with maximum power. Maybe the high resistance cables compensated some voltage peaks, which appear when the motor stops? Would the Rumbaboard be switched off by those peaks coming from the motor? The motors do have 4 coils. When I was running themvon karl.ranseier - Controllers
Hi, after having trouble with a ball bearing and motor cables which became hot (I used Rs232 cables for large motors) I decided to remount everything. Now I have thicker cables. End stop and motor wirings are separated now. x,y,z and extruder motor work fine when I use them independent. If I move x and Y for about 2 seconds (in my case around 100mm), suddenly the rumba board resets itself. Thisvon karl.ranseier - Controllers
Ich warte seit zehn Wochen auf die Bestellung. Wie Ihr alle schon schreibt: keine Antwort. Ich habe kein paypal, da die mich in genau so einem Fall mal im Stich gelassen haben. Ich habe mich dort beschwert, als Antwort habe ich bekommen "Fall ist erledigt". Mehrfach. Ich werde dann wohl demnächst da vorbeifahren und das persönlich klären.+ Warum nur habe ich nicht vorher gegoogelt?von karl.ranseier - Offtopic
Ok, a friend got this idea: - connect a transistor to the "enable" pin of the used motor. - the enable-pin is 5 V when the motor is off, 0 when it is on. So no change in the firmware is needed: perfect! I will write if the solution worked. By the way: is there anyone reading this? Maybe in the future... ;-)von karl.ranseier - Firmware - experimental, borrowed, and future
Hi, as a very early beginner I am setting up a 3D printer using an old CNC machine. I bought the RUMBA-Board and bulldog XL. The motors are the original ones. At the moment I use the repetier host software and Marlin firmware. I tried repetier-firmware, but had big problems with the homing of all axis (they moved in the wrong direction and switching the direction in the software did not help, butvon karl.ranseier - Firmware - experimental, borrowed, and future