SeeMeCNC Rostock MAX v2 User Manual page 23

Fig. 2.2-3: Testing the end stop switches.
An "L" next to each label indicates that all three end-stop switches have not been pressed. If
you see anything different, please check your wiring as mentioned previously! Now I want you to hold
down the switch lever for the X axis and re-send the M119 command. You should see the x_max value
change to "H". Do this for the Y and Z axes. This will ensure the end stop switches are functioning –
this is very important for the next step!
Click the CONTROLS button to get to the screen where we'll perform the movement tests.
Fig. 2.2-4: To the Controls pane!
The next test we're going to perform involves making sure that the stepper motors on the towers
are wired correctly. Every once and a while we'll see a stepper motor with the connector wired
correctly, but the internal wiring is backwards. Maybe the elves that build stepper motors were having
a bad cookie day or something. Let's find out if you won a bad cookie motor!
Fig. 2.2-5: Home Axes.
The next task is to make sure that you can "home" the machine. By clicking on the ALL button
shown above, it should send all three axes up to the end-stop switches.
With one finger on the power switch, click that ALL button! If any of the three axes do not
head up to the top of the machine, turn off the power immediately! You don't want to do any damage
to the machine due to an inverted axis. Don't worry though, fixing an inverted axis is VERY easy!
If you need to apply this fix, click the DISCONNECT button in MatterControl and then open
up Repetier-Firmware in the Arduino IDE. Click on the tab marked "Configuration.h". You may need
to increase the width of the IDE window in order to see that tab.
Rostock MAX v2 User's Guide
2 – Installing MatterControl and Calibrating the Printer - 23
The three switches are known as "x_max",
"y_max", and "z_max". Each one should have an "L"
next to it as shown on the left. If any of them show an
"H", check your wiring to ensure that the switch is
connected properly at both ends. The printer will not
operate properly if any of the end-stop switches are
reporting "closed" when they're not.