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How to Check the Z axis limit switch or cable is broken

Robin Shakya

How to Check the Z axis limit switch or cable is broken

1. Checking Z axis button

Sometime Z axis button can be jammed. You can check by pressing the Z axis button while pressing Z axis button you will hear clicking sound and can see moving Z axis limit switch and LED light will turn on. If you did not hear clicking sound and cannot see the moving limit switch, then something wrong with button of Z axis limit Switch

2. Checking Z axis Limit Switch manually

i. Select Set Up=> Select Jog Mode=> Select Z axis

 

ii. Press and hold button to move the Z axis upward.

iii. Press Z axis limit switch by hand when you press Z axis limit Switch, LED light should be turned on and Z axis will stop moving. If it did not stop after pressing the Z axis limit switch. Then either Z axis the limit switch or limit switch cable is broken.

3. Limit switch or cable of limit switch is broken

i. You need to open button cover. Unscrew these two screw see the picture. Turn printer faces button part towards you.

ii. Swap Z axis limit switch with Y axis limit switch on the motherboard. After swap, your Y axis limit switch is now Z axis limit switch.

ii. Turn on your printer and select Set Up, select Jog Mode and select Z axis.

iii. Press and hold the button and the building plate move upward.

iv. Press Y axis limit switch by hand. (We have already swapped Z axis limit switch with Y axis limit switch. Now your Y axis limit switch work as a Z axis limit switch). When you press the Y axis limit switch. The build plate should stop moving. If it stops, then your Z axis limit switch or cable is broken.

4. Limit switch or cable problem:

i. Change your Z axis limit switch with Y axis limit switch.

ii. You need to unscrew the screw below the Z axis limit Switch.

iii. You need to unscrew the Scree of the Z axis

iv. You need to unscrew the screw of the Y axis

v. Change with Y axis with Z limit Switch.

vi. Turn on your printer and select Set Up=> select Jog Mode=> select Z axis.

vii. Press and hold the button and the building plate will move upward.

viii. Press Y axis limit switch by hand. (We have already swapped Z axis limit switch with Y axis limit switch. Now your Y axis limit switch work as a Z axis limit switch). When you press the Y axis limit switch. The Z building plate should stop moving. If stop, then Z axis limit switch is ok. Your Z axis limit switch cable is broken. If it did not stop then limit switch is broken.

5. Checking Cable:

i. You need to change back Y and Z limit switch cable on the motherboard as its original position.

ii. You need to install Y axis limit Switch in Z axis Limit Switch.

iii. Turn on your printer and select Set Up, select Jog Mode and select Z axis.

iv. Press and hold the button and the building plate move upward.

vi. Press Z axis limit switch by hand. (We have installed the Y axis limit switch into the Z limit switch. The Y limit Switch worked normally). When you press the Z axis limit switch. The build plate should stop moving. If it did not stop, then your Z axis limit switch cable is broken.

NB: limit switch cable connection on Motherboard jack; X, Y and Z axis limit switch cable connect with motherboard jack X-Max, Y-Max and Z-Min respectively.

Please follow the above steps if you are facing any problem contact us at support@mbot3d.com

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