Have you reconfigured marlin for the ramps board, updating the motherboard line? I would take a few steps back... remove the mega, plug only the mega into the computer, can you talk to it with controlling software? If that’s fine, add an un populated ramps. re test Then add endstops and test they work with M119 then add thermistors and re test, can you now read room temp? add you screen baby Dust - Reprappers
The supplier of your ramps in an effort to save $$ has used a different socket to normal. The wiring is identical to what you would have used on the power plug.by Dust - Reprappers
Printrboard uses AT90USB1286 and was one of the first to bring virtual UARTS to my attentionby Dust - Controllers
@dart16, you are entitled to your opinions, but some of the above are factually wrong. "Voltage regulator on the arduino is not a problem if you are connected to either a powered hub or a computer as +5v also comes down the USB cable. (if there even is a problem - -AMS1117 is rated at 800mA)" on a ramps 5v is from the regulator only, if d1 is in place. When 12v is applied to the regulator a cirby Dust - Reprappers
Rambo Mini also has.... better stepper driver heat dissipation due to being on the board. connectors have clips, so plugs don't fall out. (if you have appropriate plugs) The build quality is also much superior Its also the only board that genuine prusa i3 mk2 firmware binaries runs on....by Dust - Reprappers
Your missing one important column (from my point of view) usb speed, most are limited to serial speeds, but others have virtual uarts and run full (ish) usb2 speed. The result of this is that some are dead slow and can run out of buffers on curves and other high detail parts, they also need the firmware and software to match baud rates. Others use full usb speed and just ignore baud rate settinby Dust - Controllers
The "Blue" pins are the control lines into the stepper driver, ie step direction enable and gnd. You cannot directly plug a second stepper motor in there. Are you using both E0 and E1? if not you can just plug the second Z into E1 and update your firmware see Configuration_adv.h // A single Z stepper driver is usually used to drive 2 stepper motors. // Uncomment this option to use a separateby Dust - Firmware - Marlin
Since its a core xy... X moves when both motors turn the same direction Y moves when both motors turn in opposite direction if you want to invert Y movement, you have to swap X and Y stepper motors to each others plugs on the controller (Never do this while it has power!)by Dust - Firmware - Marlin
the file you linked to is not your configuration.h it is Conditionals.h Please post your configuration.hby Dust - Firmware - Marlin
With external drivers, the micro stepping jumpers on the ramps are not used You can set the ramps jumpers how ever you like, all on, all off, mixed, they will be ignored. This is presuming your external drivers are just use the step, direction and enable lines. Re firmware: yes, if your not using eeprom setting. As eeprom setting will over ride the firmware settings.by Dust - Stepper Motors, Servo Motors, DC Motors
Meliz board use a usb to serial converter chip, as long as that gets power it should show up as a serial port, regardless of the state of the processor I would guess a power supply issue, maybe a endstops plugged in backwards causing a short. Give this a try unplug all cables from the board including power Move the jumper (jp15 on most boards) to usb power eg Plug in the usb cable, doesby Dust - Printing
Hi Everyone Can someone with a real Original Prusa i3 MK2 answer some question relating to its parts? Starting with the Y axis What are the lengths of the smooth rods, they seem to be 330 mm, but I would like it confirmed What is the lengths of both types of M10 rods? The M10 Nuts, are these metal or nylon?by Dust - Prusa i3 and variants
you need to set your current limits on your stepper drivers. On most they have a small variable resistor you adjust, ideally you measure the voltage and apply some maths to work out what current to set. NB do not move this variable resistor with a metal screw driver... if you have no choice, make sure it is completely off (no power, and usb is disconnected) Many a person has killed all their eleby Dust - General
"Bigfoot BSD2100 - Based on TMC2100. Quiet and smooth. Jumpers to modify settings." panucatt.com product... seem to only be available as an option with a Azteeg X5 GTby Dust - Controllers
RRF is reprap firmware (for 32bit boards based on Atmel SAM3X8E and ATSAM4E8E chips)by Dust - Firmware - Marlin
Worse case: all the driver modules and the mega Best case: just the driver you where working on and the mega (since that's where the LCD power issue comes from) Megas of course come blank, you will need to put firmware on it.by Dust - Prusa i3 and variants
Its probably your mega then I'm unsure which port your talking about, your first post days D8, and later your talking about the hot end on D10. You configuration doesn't help as you have missed the "motherboard =" section so I don't know what part of config its using. Your topic says "D8 to D10" but if this is your heated bed, you can't do this. D8 is on the 11amp circuit. plugging the heated bby Dust - Firmware - Marlin
Would have see the entire belt and whats where to know what to do.. But firstly the belt pulley on the stepper motor can be move up and down the stepper motor shaft.. so there is one place for adjustment. At a guess without seeing the rest of it, this belt pulley need to moved up the motor shaftby Dust - General Mendel Topics
Ball park guess, you have insufficient part cooling Do you have a fan on one side and thats the side that is good? If so lower your hot end temp a little, and potentially add more part cooling (needed for PLA)by Dust - Reprappers
Very nice testing and Documentation. As you have probably worked out the +12 is connected directly to the heated bed (threw a fuse) like you have shown, the -ve line is controlled by the controller. It looks like the mosfet controlling the headed bed is working or nothing wouldn’t change when you turn it on. My guess would be a shorted bed or the 11amp polyfuse is heating up really fast and diby Dust - Prusa i3 and variants
on newer marlins there is now a section to define which plugs to use // Specify here all the endstop connectors that are connected to any endstop or probe. // Almost all printers will be using one per axis. Probes will use one or more of the // extra connectors. Leave undefined any used for non-endstop and non-probe purposes. #define USE_XMIN_PLUG #define USE_YMIN_PLUG #define USE_ZMIN_PLUG //#dby Dust - Reprappers
not to mention to whole forum dedicated to the duet.by Dust - Controllers
Its still the same as a Cartesian... just ignore that both motors are moving. Im guessing your #define Y_HOME_DIR -1 is set to 1, which would home to max.by Dust - Reprappers
Sigh... I pointed out that driver back on feb 11th!!! Greywolf, you even commented on it.... Something fishy here... here it is again...by Dust - General
Your on board voltage regulator on the mega is toast Both the DC jack and the power from ramps vi D1 feed this regulator. So you cant run both at the same time. power from USB is 5v direct from the computer You have three options. 1) Replace the mega (or repair if your good at electronics) 2) Create you own 5v from 12v and apply it to the board +5v lines (some people use unused endstop pinsby Dust - Reprappers
perhaps but I don’t have dimensions for the 623h to check its right. Or even better, pick your sizeby Dust - Prusa i3 and variants
Can you list make and model of SD cards that did and didn’t work? Just in case someone else has same hardware they are tiring to use I'm using Kingston 4gb class 4, seem to work.by Dust - Controllers
real arduinos don’t have ch340 they use a ATmega16U2 as a serial over usb converter Only china clones use ch340 But I find it difficult to believe mac is having such issues.. Linux drivers for ch340 are good, and Mac was/is lunux under the hood. One solution might be to simply bypass the ch340... get yourself a usb/serial board (making sure its Ftdi, silabs, cp2102 or other chipset, but notby Dust - Prusa i3 and variants