I have built my lowrider almost completely, but yesterday I powered on my Rambo and it worked. I unplugged it, and took out the endstops to test something, and when I plugged the board back in the led’s just didn’t turn son, but it had worked a few seconds ago.
And nothing has burnt and fuses are fine. When I connected a usb cable to my computer and also connected power, repetiré host could connect, but the lcd that was connected to the board didn’t turn on, neither did the led’s on the board. This is the setup
Also, on repetiré host it tells me that there are five commands waiting, is there any way I can find out what those commands are and delete them or something?
Thanks for the help, it’s frustrating that I almost had it finished and now this happens.
Maybe it’s just me, but it looks like the Z stop may be plugged in backwards, shorting +5V and GND. That will cause the board to shut down to protect itself.
Edit: Scratch that… Well, this photo appears to be before, so was this when it was working?
Try unplugging all of the endstops and see if it powers up.
The thing is that I tried unplugging the endstops, and steppers and it still wouldn’t power on. But what is weird is that when I connect the usb to my computer, repetier host can connect to the board, but there are commands waiting.
If the endstops were set up as NC, they are now all open, so the board is probably panicking because all the endstops are triggered. Try putting jumpers on all the endstop connections (specifically, the C and NC pins only).
F2 is for the motors, and is on the edge of the board next to the power connectors, beside the EXT jumpers for the LCD. (Probably OK, but should be checked) It will be a little white box sort of thing.
F3 is the logic fuse, and is the little white box just inboard from the power connectors.
F4 is the obvious one, and we don’t use it, so it should never blow. It’s the big 15A ATO type fuse and it’s for a 3D printer’s heated bed.
So, I tried checking the picture ja for the endstops on the board, and they are all fine and giving out 5v. Until now I have tested everything mechanically and physically for the endstops but what seems to be happening is that the firmware is completely useless gnotong the output of the endstops, so is there anything I could do to the firmware, or something like it to get it to recognize and use the endstops?
F3, right? That would make sense from what you were describing.
First off, send
M119
and see what the firmware thinks is happening with the endstops. It should show them as open when the switches aren’t being pushed, and triggered when they are.
Stock V1 firmware expects the switches to be between the (S) and (-) lines on the mainboard and wired to the (C) and (NC) pins on the switch. For most microswitches, these are the outside pins, leaving the one in the middle not connected, but it doesn’t hurt to check.
In any event, M119 is the command to see what the status of the endstops is. Just for reference, the response that I get on my printer (X, Y are in the middle of the bed with Z homed) is this:
Send: M119
Recv: Reporting endstop status
Recv: x_min: open
Recv: y_min: open
Recv: z_min: TRIGGERED
Recv: ok
It would be different on the LR, of course, but Marlin will at least let you know what it thinks is happening. Try it while pressing the switches, too.
I have tried sending an M119 command, and all the endstops come out as triggered except the z min. But when I press them down, nothing changes, also they come back as triggered even if they are not. On top of that I have everything connected as you said, so I don’t know what to do
Remove the endstop and very carefully put a jumper from S to ground on the xmin pin. Don’t touch the +. That should change it to open. If it still shows triggered, then something is broke.
If the jumper comes up as “open” then the problem is in your switch wiring. It should be as I described above, with the (S) and (-) pins connected to the (C) and (NC) pins on the switch.
You can check the switch with a multimeter. If there is continuity between the pins when the switch is released, and NO continuity between them when the switch is pressed, it’s wired correctly.
So, I tried putting a jumper in the endstop pins on the board, and when I did they all came back as open, which from what I understand means the board is fine. Then, I plugged in the endstops and checked continuity. I had to flip the wires and the there was continuity. But when o send the M119 command with the endstops I logged in correctly, the y axis comes back as triggered. The z axis, comes back as open and it recognizes the switch, so it goes down and tries to home but the switch doesn’t stop it. As you know I was having trouble with the power on the z axis, so I had to put it in series. Is this the reason why the z axis isn’t working? The only axis I don’t understand is the y axis.
