Quick Start Video:

Complete Guide:

Note: There are many common terms for the Endstops. They may be calling homing switches, limit switches, endstops, Xlimit-, YLimit-, X-Left, Y-rear etc. They all are referring to the same type of switches.

Symptoms of an Endstop issue:

1. X or Y axis continues to run into the hard stops, vibrating and making a chattering noise during a startup or axis reset

2. X axis moves slowly to the right during a startup or axis reset

3. Y axis moves towards the front of the machine during a startup or axis rest

4. Error Message for the Endstop switch being triggered when it was not expected

 

Bolt Endstop Function Check:

X Axis Function Check:

Visual Inspection:

For this test we want to visually inspect the switch for damage, that the switch is still wired correctly and that the arm of the switch is still in tact

X Endstop Location (Back of Moving Gantry)	X Axis Endstop Wiring (C and NO)

We also need to visually inspect that the Activator Arm for the Endstop Switch. Make sure that the arm is not swung out of the way or to high to activate the Endstop. Adjust as needed.

Activator Arm (Behind X Motor)	X Axis Switch being Activated by arm

Access the diagnostic screen from the MENU tab on the controller screen. Press the lever on the Endstop and observe the Red square status of X-Left Limit. As you press the lever, it should be easy and just "click". If you have to press super hard to get it to "click" then the internal part of the lever is likely broken off and the switch needs replacement.

X Endstop Not Activated	X Endstop Activated

X Axis Endstop Not Pressed, Expected Result (Lid Open)	X Axis Endstop Pressed, Expected Result (Lid Open)

Access the Ruida Controller on the right side of the machine by opening the main door.  Press the lever on the Endstop and observe the RED  LED status for LED 1

X Endstop Not Activated	X Endstop Activated

X Axis Endstop Not Pressed, Expected Result LED 1 OFF	X Axis Endstop Pressed, Expected Result, LED 1 ON

Y Axis Function Check :

For this test we want to visually inspect the switch for damage, that the switch is still wired correctly and that the arm of the switch is still in tact

Y Endstop Location (Back Right)	X Axis Endstop Wiring (C and NO)

We also need to visually inspect that the Activator Arm for the Endstop Switch. Make sure that the arm is not swung out of the way or to high to activate the Endstop. Adjust as needed.

Activator Arm (Right Side Of Gantry)	Y Axis Switch being Activated by arm

Access the diagnostic screen from the MENU tab on the controller screen. Press the lever on the Endstop and observe the Red square status of Y-Rear Limit. As you press the lever, it should be easy and just "click". If you have to press super hard to get it to "click" then the internal part of the lever is likely broken off and the switch needs replacement.

Y Endstop Not Activated	X Endstop Activated

Y Axis Endstop Not Pressed, Expected Result (Lid Open)	Y Axis Endstop Pressed, Expected Result (Lid Open)

Access the Ruida Controller on the right side of the machine by opening the main door.  Press the lever on the Endstop and observe the RED  LED status for LED 3

Y Endstop Not Activated	Y Endstop Activated

Y Axis Endstop Not Pressed, Expected Result LED 3 OFF	Y Axis Endstop Pressed, Expected Result, LED 3 ON

Bolt Endstop Adjustment:

Adjustment is used to make sure that the Endstop switch is properly positioned and that the arm that triggers the Endstop is also properly adjusted to trigger the Endstop. You should only adjust after checking the Endstop with the information in this article about Function Checks. If the Endstop does not pass a function check, then it is pointless to adjust.

2.5mm Allen Wrench for Arm and Y Axis Plate Socket Head Bolts

2mm Aleen Wrench For X Endstop Plate Button Head Bolts

X Axis Endstop Bolts	Y Axis Endstop Bolts

Bolt Endstop Replacement:

1.5mm for Endstop Mounting Bolts

X Axis Endstop Bolts	Y Axis Endstop Bolts

Power off the machine and unplug it from the wall. Slowly move the Gantry towards the front so that the X Endstop is easy to access.

1. Unbolt the Endstop using a 1.5mm Allen wrench on both bolts. Set the bolts aside

Remove the 2 Bolts holding the Endstop to the Plate	X Axis Endstop Removed from Plate	Bolts to Mount the X Axis Endstop to Plate

2. Remove the Endstop and then wiggle the wire terminals loose.

Note that the wires are on the C (Black wire) and NO terminals (White Wire) of the Endstop.  C stands for common because it is common to both the NC and the NO terminals. NO stands for Normally Open which means the switch does not pass the Common signal unless it is pressed. If you mix up the C and NO wires, it is ok, the switch will still function. Just do not use the NC terminal

3. Install the wires and bolt the Endstop back up. Be sure to bolt the Endstop back to the correct mounting holes

Install wires onto the Endstop	Install Endstop to Plate

4. Check the adjustment per the steps in the previous section of this guide

1. Unbolt the Endstop using a 1.5mm Allen wrench on the two bolts. Set the bolts aside

Remove the 2 Bolts holding the Endstop to the Plate	Y Axis Endstop Removed from Plate	Bolts to Mount the Y Axis Endstop to Plate

2. Wiggle the wire terminals loose.

Note that the wires are on the C (Blue wire) and NO terminals (Brown Wire) of the Endstop.  C stands for common because it is common to both the NC and the NO terminals. NO stands for Normally Open which means the switch does not pass the Common signal unless it is pressed. If you mix up the C and NO wires, it is ok, the switch will still function. Just do not use the NC terminal

3. Replace the switch in reverse with the new switch.  Install the wires onto new Switch

It may be easier to remove the plate, then mount the switch to the plate and then the plate to the bracket

Switch uses the upper mounting holes on the Plate

Install wires onto the Endstop	Remove the plate from the Stand and install the Endstop	Install Plate to Bracket

4. Check the adjustment per the steps in the previous section of this guide

Where to source Replacement Endstops:

Reference Articles: