update: I just went looking into the firmware and found out that D10 turns on when the motors go on for a period of time. so when the motors move, the fan turns on and blows onto the steppers drivers so that they won't burn Because I wanted to aim one of my fans towards the RAMPS board this is option will work just perfect for meby doniboy - RAMPS Electronics
hey, I flashed the new firmware onto my arduino and now D8 is the hot-end again and D9 is a fan. But I tried the command that Cefiar gave but it doesn't work I used this command: M106 P0 S255 M106 P1 S255 Of course separate and not both commands at the same time. So my question is: How DO I turn on the second fan? I was also wondering how and if I can add or change the commands so that I canby doniboy - RAMPS Electronics
that's what I thought! I'm going to reflash the firmware on my MEGA and see if it works.by doniboy - RAMPS Electronics
hey thanks for that command it will help a lot I found this in the pin.h: #if MOTHERBOARD == 35 #define CONTROLLERFAN_PIN 10 //Pin used for the fan to cool controller #endif #if MOTHERBOARD == 35 #define HEATER_0_PIN 8 #else #define HEATER_0_PIN 10 // EXTRUDER 1 #endif so it says that pin 8 (D8) is the HEATER or hot-end and pin 10 (D10) is a fan. But I doby doniboy - RAMPS Electronics
I hope somewone reads this and fixes the bug because I don't know if I have the skills to fix it. I think I'm gona use one PWM fan and leave one on the whole time, maybe that I can use the 12v-aux that is placed behind D2.by doniboy - RAMPS Electronics
hey, I did what you said and changed the board number to 33 and now D8 is the hot-end, so when I press "heat" in pronterface D8 gives 12V and LED4 lights up D9 is still the fan output that I can turn on with the M106 command. So the good thing is that I now have successfully tested D10 but the bad thing is that I can't have 2 fans.by doniboy - RAMPS Electronics
o sorry I messed up a little bit in my comment. I meant to say that when I press "Heat" in pronterface (so not "Bed") , D8 turns on I measure 12V and see LED2 light up. When I turn the FAN on with the M106 command LED3 goes on and D9 puts out 12V So, I don't use a heated-bed and I'm not planning to use one so that's why I changed the board number in marlin (configuration.h) to 35 what means thatby doniboy - RAMPS Electronics
no when I turn the heater on with pronterface, LED2 lights up and D8 gives a 12V output When I use the M106 command to turn the heater on LED3 lights up and D9 gives 12V output LED4 won't go on because I don't know how to turn it on, normally you would turn the heated bed on but I don't have a heated bed.by doniboy - RAMPS Electronics
D8 is the hot-end and D9 & D10 should be fan outputs. In the configuration.h is a section in which a motherboard needs to be selected, it looks like this: //// The following define selects which electronics board you have. Please choose the one that matches your setup // 3 = MEGA/RAMPS up to 1.2 = 3 // 33 = RAMPS 1.3 / 1.4 (Power outputs: Extruder, Fan, Bed) // 34 = RAMPS 1.3 / 1.4 (Powerby doniboy - RAMPS Electronics
hey Yesterday (Friday) I went to reprapworld and explained the problem to them and I got 3 new mosfets for free. This afternoon I soldered them in and now my ramps is working like it should. I only have one question: how do I turn D10 on? I installed my marlin firmware with 2 fans and 1 heater (board number 35) so heated bed doesn't work.by doniboy - RAMPS Electronics
I bought this kit complete from reprapworld.com I even went to the store to buy it instead of ordering it. But how come that went I wire the mosfet/voltage regulator as a voltage regulator (so +9v to left pin and -9v to middle pin) the heatsink (backside) goes VERY hot in a short time? I probably drop by reprapworld.com again to ask for a replacement. here's a pic of the same mosfet or whateveby doniboy - RAMPS Electronics
hey, this weekend I desolderd the mosfets and performed some tests on them. When I connect a switch coming from -3V to pin 1 (viewed from the from so where the black box is) en connect a led also from -3V to pin 2 and finally I connect the +3V to pin 3. When I press the switch the led goes off and when I release the switch it goes back on. Is this wright? I also checked the voltages on the placeby doniboy - RAMPS Electronics
ok I will try to desolder one of the Mosfets and let you know what happens. This won't hurt the fets right? I mean, I can't burn them or something?by doniboy - RAMPS Electronics
I checked the resistant on the center pin of the mosfets and they are all about 10.7K ohm Pin 3 (the most right one) all measure around 0 ohm. (btw I put the negative probe from my multimeter on the ground pin where the power supply would be) I attached a pic of the board with power on but no usb connected. Can it be that the diode is broken?by doniboy - RAMPS Electronics
Hi, I checked the voltage coming from the arduino (pin 8, 9 and 10) and they are 0V (so probably not a firmware related problem). Then I unplugged the arduino from the RAMPS board (of course I first turned the power off) and when I turned the power back on the led's where still the same (led 3 an 4 on, led 2 off). So the mosfets somehow turn itself on . I also measured the voltage on the mosfetby doniboy - RAMPS Electronics
Quoteolisoft did you connect the power supply to both connectors on your ramps? yes I did connect my power supply the right way (I'm using a ATX 500W power supply) Quotewaitaki The mosfets do not control the motors, the Pololu drivers do that. Also, those LED's belong to the heater, bed and fan circuit. Or am I misunderstanding you? I think you are. I meant to say that my motors are working coby doniboy - RAMPS Electronics
hey, I recently soldered a ramps 1.4 together and now I'm running into a problem. Before uploading the firmware (I'm planning to use Marlin) I wanted to try the test code which I found here: http://reprap.org/wiki/File:RAMPSTestCode.pde So I uploaded the code into my arduino mega r3 and hooked up the motors and the power supply (I didn't have the hot-end yet). I saw the motors wiggle but the mosfby doniboy - RAMPS Electronics