I see... can you recommend a good schematic for such driver or maybe a link for purchasing? I do not have an oscilloscope to verify this spikes, one of my good friends had one but unfortunately cancer took him a couple of months ago... Again, thank you for your time and help!by eugen360 - RAMPS Electronics
Hi, My friend, your help is much appreciate it! Thank you very much! Maybe one last question... looking for a good driver on internet I observed that on many link it is specified: "driver for 445nm or for 800nm" and so on... is this really matter? All I have to check is the rated voltage an amperage, no? So even if my diode has 445nm wavelength I can use a driver "for 800nm"... right? (as long asby eugen360 - RAMPS Electronics
I've found this: NUBM06 So... with the integrated driver is a No-No for Ramps... What about such driver? ebayby eugen360 - RAMPS Electronics
I really appreciate your concern and with all my respect let me tell you the same thig I say to all those who answer the same way: IF you are not willing to give an answer then don't answer at all... just ignore the topic, really, no problem at all! But just writing something and not answering is... not right! My simple question was if the fan output on the Ramps can handle 3-4 amps? As you can sby eugen360 - RAMPS Electronics
Hi, Sorry I do not have an answer for you but rather a few questions: where do you plug the laser? On fan port? What kind of laser are you using? I'm trying also to build such a beauty!by eugen360 - Firmware - Marlin
Quoteo_lampe There are many ways to switch the laser driver ( fan output, extruder step pin, any other PWM-capable I/O pin ) Hello, I have a big question mark: if I have a laser capable of 3.5 Watts aprox. 4 Amps, and I'll use the fan output on the Ramps board doesn't this burn down the circuit?? The fan output is capable for this much current? The laser diode I'm talking about is found overby eugen360 - RAMPS Electronics
Thanks for your answer and you are correct but considering that I already have a 3D printer I thought it would be easier to try a modified Marlin for CNC (I would like to try out some PCB milling) ...by eugen360 - CNC Routers, Mills, and Hybrid RepRapping
Yes, it was stupid... it IS different but until now it seem that all the sites I've searched are keeping this info secret... Can someone point me to a place where I can eventualy download the modifyed Marlin? Thanks in advance!by eugen360 - CNC Routers, Mills, and Hybrid RepRapping
Hello, I have a question (maybe stupid): the Marlin code it is different for CNC as the one for 3D printing?by eugen360 - CNC Routers, Mills, and Hybrid RepRapping
Solved by miself ... It wasn't X but Y...by eugen360 - General Mendel Topics
Hello, I have for Y axis the endstop at the motor side but for X axis the endstop is at the oposite side (I3 rework version)... So in order to print correctly do I have to modify Marlin AND also reverse the X axis motor connector? Thank you!by eugen360 - General Mendel Topics
Well I've learned the lesson the hard way: never assume! Thank for your support Dave, you seems to be the only one in more than 300 who took some time for a beginner like me ! Appreciate it!by eugen360 - General
Hello, Finally it's ALIVE ! But not the wires were the problem... I took the magnification glass and looked at the boards, Ramps and drivers and I was amazed by the discovery made... the 4 pins that goes to the motors are... on the other side... Did I mention that my drivers are DRV8825 and not A4988 ? See the difference? Everywhere I've looked and read, everybody is saying "mount the drivby eugen360 - General
My friend, look at the order on the ramps: 2B-2A-1A-1B and now considering my actual wiring which is accordingly to first image (of the stepper driver): -first coil wire 1 -first coil wire 2 -second coil wire 1 -second coil wire 2 ... it's wrong! I mean the order is correct for the Pololu shield BUT I've used this order on ramps! Acording to ramps must be like this: - first coil wire 1 - secondby eugen360 - General
As stated a few post above, wiring of the motors are in this order: red-blue(first coil)-green-black(second coil)... .... After I write the line above I've google searched again for wiring of stepper drivers... OMG I'm not sure but maybe I've found the problem... Look at this two images: and If I take only the first image my wiring is correct BUT... if I'm judging accordingly to second imaby eugen360 - General
I have measured and the 12V is going to the Arduino via the AM-VIN as it should. Also I have measured 12V on the stepper driver slots, on all of them... I have used this: I have rotated the small trimpot's on the stepper drivers adjusting the voltage in such manner that if Arduino is powered only via USB on this potentiometer I have 0.8 - 0.9V as Steve Roy suggested on Instructables (he is membeby eugen360 - General
QuoteWhat voltage ( DC or AC ? ) are you feeding the Arduino via the Ramps board. DC of course! QuoteWhich pins are your input power connected to on the Ramps board ? I've said I have both line powered: 5A and 11A. Or I did not understand the question? QuoteThe fact that you are not getting anything on the LCD without the USB connected, seems to indicate that you may have missed the 2 sets of powby eugen360 - General
The connectors marked 5A - power the stepper drivers and the extruder heater/fan (D9, D10). The connectors marked 11A - power the heated bed, or other output (D8). Arduino must take it's power via the D1 diode mounted on RAMPS! -> this is to run a 3D printer without a PC or without another power line for Arduino (like USB or 7-12v to the barrel connector) I have power on both set of connectorsby eugen360 - General
No other ideas? Please, I really need your help...by eugen360 - General
I have uploaded again the test code... all the LED's from Ramps are blinking, inclusive the one from the heated bed but... no movement of the motors... The bed is warming up also the hot-end... Wiring of the motors are in this order: red-blue(first coil)-green-black(second coil) And there is something that I don't understand and I forgot to mention here: WHY do I need to plug in the USB cable toby eugen360 - General
Big update! You have to trust me on this: I did not modified the wire connections or anything else, I've only added a fan to cool down the Arduino !!! Now it's stable! I can now connect the printer to Pronterface or Repetier, the bed is warming up also the hotend but some problems still remain... motors not work. I have to mention that I use optical end-stops and Pronterface says that X, Y or Zby eugen360 - General
Well, the "blink" test is Ok. LED is blinking with or without Ramps, with or without all the wires on the Ramps and with USB or with 12V power line. One observation: I'm powering the Arduino via the diode on the RAMPS board so Arduino itself doesn't need another power source when the "sandwich" is made... So after all this blinking test I've uploaded again the test code and no news, no movement..by eugen360 - General
Not very good news... I've uploaded Ramps test code, remade the sandwich, power it up with 12V and... nothing! Only one of the red LED's and the green one from the Ramps board are blinking... This means the board is bad?by eugen360 - General
Quotetadawson 6) Leave the Arduino regulator and power as-is, and add a regulator to fulfill the RAMPS 5v loads (servos, LCD, etc.). The Arduino regulator is more than adequate for just the Arduino . . . - Tim Hello Tim, I have some problems with my buil also: when I plug in the USB cable or the 12V power line all I can see on LCD is "RepRap PT ver 1.3" then this disappear and all goes white aby eugen360 - Printing
Yes, I've read that post too and tried without the LCD... no connection with the PC...by eugen360 - General
I have tried 3 or 4 times uploading the Marlin, each time with different settings, even with just the basic like baudrate, motherboard type... and 2 times I've seen for 2-3 seconds the normal menu of the printer (with the status, temp, etc) but that was all... the main behavior is like described above. I'll try the Ramps test code to see what's happening. One question: this test code needs to beby eugen360 - General
The electronics are not yet on the printer frame and the frame is made from wood... but anyway everything is on the table in a big mess....by eugen360 - General
Hello, I've build a copy of Prusa I3 printer putting a lot of effort and time and money in it... now I'm struggling to make it work but for two days now, I can not understand what is wrong with it? I have made the required changes in the Marlin config file and uploaded to the Mega 2560. I've made the sandwich with the Arduino+Ramps1.4+stepper drivers+LCD extension(reprapdiscount smart controllerby eugen360 - General