X-axis endstop backwards?

[stegbkc]

I'm confused about the X-axis endstop on my I3 Pro-W.

If I place the endstop switch where the instructions tell me (on the left hand side of the printer as I read the LCD).

The Y endstop is at the back, The Z-endstop is hit by the set screw as the extruder approaches the bed.

The X switch in the instructions is plugged into the x-min space on the board, the Y switch into the Y-min and the Z switch into Z-min.

When I turn the printer on and use the panel under prepare to move the extruder, when I increase the X value the head moves from my right to left. Increasing the Y value moves the bed forward and increasing the Z value moves the extruder head up. A right handed co-ordinate system.

If in this configuration (switches positioned and plugged correctly as I read the manual) I push auto-home, the Y and Z axes move until they hit their endstops. The X axis, however, moves all the way to my right and then grinds against the stop. If I hit the switch on the other end of the X-axis, the grinding stops. The printer believes it has hit the X-min endstop which makes sense because it is plugged into the x-min port on the board.

So now I move the switches plug to the X-max port, because this switch is depressed when the value of the X-axis increases.

Now when I auto-home the printer there is no grinding. The board knows that there is not a X-min switch plugged in.

I send the command "M119" to the printer, and the response is:

At this point everything seems good. I go to test the X endstop by moving the extruder in the X-direction from the control panel then depress the switch. Nothing happens. I then looked at the code for the I3Pro W and lo and behold, the X-min setting is enabled, and there is no setting for an X-max.

What am I doing wrong? This whole thing would work beautifully if the switch were on the right side of the printer, but there isn't a place to mount it there. I've looked at pictures of the printer, and the switch seems to be in the location in the pictures and instructions, and the mounting holes are there for it's placement.

I know if this really were an error I wouldn't be the first person to run into it. There is no way to mount the X-axis upside down, the belt only fits one direction. This is driving me nuts, what am I not understanding???

Thanks in advance for the help!

[William]

Hi, If your printer's x-axis only runs in one direction,
You can check whether the position of the limit switch is wrong or reversed.

A+接线板.jpg (598.18 KiB) Viewed 4339 times

If you enter M119 in the manual control of the Repetier host.
Check it out: http://geeetech.com/forum/viewtopic.php?f=17&t=60927
Swap the driver board on the motherboard to check the situation.