I am using Ramps 1.4 with Mega. White colored PCB might be confusing but it is from Elecfreaks.
I placed the endstop blocks 10cm away from corner pieces, so the gantry doesn’t clash with surrounding steel pipes.
Let’s say I place the gantry by hand in a random place. When I start the machine, I am not able to move gantry in X(-) or Y(-) directions. It looks like the firmware thinks that the machine is alredy in 0,0 position.
If I click Home for both X and Y axis via Repetier host, it works fine.
How am I supposed to move further?
What should I do with the following statement:
The unfortunately designated M666 lets you test your offset to quickly calibrate your machine. Using the command M666 X0.72 would offset the X1 stepper 0.72mm away from it’s endstop, Y! can also be used. To verify your current settings during calibration just an M666 will show the current offsets. Once the correct offset are found you should input them into your firmware.
How will I designate the offset value? Ryan gave 0.72 but why?
That sets one of the axis ends offset. Say if you’re not perfectly square, you can offset one end to bring it into alignment. Dual endstop can’t move negative numbers, that’s why you have to home x and y first. Don’t worry about the offset for now. If you built your frame relatively square you don’t need to worry about it. Once you use the machine for a while, we can help you with the rest.
To start using the machine configured in this way (advanced dual endstops) you need to move the head close top home, use your cam to have a start command of G28 X Y, and then proceed with your job. Everything is based off of CAM with Dual endstops.