ELEGOO PHECDA Laser Engraver Limit Switch Installation Guide

1. Instructions for Use

This limit switch installation guide is intended for users who can 3D print the necessary parts for the limit switch. Utilize the print files provided by ELEGOO. Ensure you are using the limit switches shown in the following image.

Image Description: A close-up view of a limit switch with clearly labeled pins for Common (C), Normally Closed (NC), and Normally Open (NO).

2. Material List

• X-axis limit switch printed part (Download Link: X-axis part)
• Y-axis limit switch printed part (Download Link: Y-axis part)
• Limit Switch x2
• 15cm XH2.54 3P cable x1
• 140cm XH2.54 3P cable x1
• Cable tie x5
• PM3*8 screw x1
• M3*6 self-tapping screw x2

3. Installation Method

(1) Install the Y-axis limit switch to the printed part.

Image Description: The Y-axis limit switch printed part, a 3-pin cable, and a limit switch are laid out on a flat surface.

Pass the cable of the limit switch through the bottom gap of the main board.

Image Description: The Y-axis limit switch is attached to its printed part, and the cable is routed through a gap in the main board.

Then, push the Y-axis limit switch printed part into place and snap it onto the screw pillars of the motherboard. Plug the cable into the "Y-" port, as shown below.

Image Description: An arrow points to the Y-axis limit switch assembly being connected to the "Y-" port on the motherboard. The motherboard has various components and connectors labeled, including "ESP-TF35 V4.1" and "ZNP S1 V1.0".

(2) Install the X-axis limit switch

Use two M3*6 self-tapping screws to install the limit switch onto the printed part.

Image Description: A close-up of the X-axis limit switch being attached to its printed part using two screws. The limit switch has three pins labeled C, NC, and NO.

Install the 3P cable on the machine and secure the cable with cable ties at the indicated red arrows.

Image Description: Red arrows indicate the routing path for the 3-pin cable along the frame of the laser engraver, secured with cable ties.

Connect the cable to the "X-" port on the main board.

Image Description: A red arrow points to the 3-pin cable being plugged into the "X-" port on the motherboard.

Then, connect the cable to the limit switch and remove the screw that secures the air filter device.

Image Description: The cable is connected to the limit switch, and a screw securing the air filter device is shown being removed.

Secure the printed part on one side to the V-wheel track, and use a PM3*8 screw to fix the other side.

Image Description: The X-axis limit switch assembly is shown attached to the V-wheel track, with one side secured and a screw being used to fix the other side.

4. Software Parameter Settings

(1) Setting of limit switch parameters in LaserGRBL.

Open the LaserGRBL software. Select the correct port number, baud rate, and click the Connect button (indicated by the red arrow).

Image Description: The LaserGRBL software interface is shown. A red arrow points to the "Connect" button. The interface displays COM port, baud rate, filename, and progress.

Click the "Grbl" button on the toolbar, then click "Grbl Configuration".

Image Description: The LaserGRBL toolbar is shown. A red arrow points to the "Grbl" menu, and another arrow points to "Grbl Configuration" within the menu.

The software will display a configuration window.

Image Description: The "Grbl $$ configuration" window is displayed, showing parameters like "Step pulse time", "Step idle delay", "Step pulse invert", "Step direction invert", "Invert step enable pin", "Invert limit pins", etc., with their respective values and descriptions.

Change the value of parameter $5 to "0", and change the values of $21 and $22 to "1" respectively. After the modification is completed, click "Write". The display will show "Config written successfully", and you can close the window.

Image Description: The "Grbl $$ configuration" window is shown again, with parameter $5 highlighted and its value changed to "0". Parameters $21 and $22 are also highlighted, with their values changed to "1". The "Write" button is also indicated.

(2) Setting of limit switch parameters in Lightburn.

Open the Lightburn software and select the correct COM number to connect to the machine.

Image Description: The Lightburn software interface is shown, with a red arrow pointing to the "Edit" menu on the toolbar, and another arrow pointing to "Machine Settings" within the "Edit" menu.

Change $21 and $22 to True respectively. Click "Outputs setup" to open the complete setup window. Change $5 to False. Click Write and then click OK to complete the parameter settings.

Image Description: The "Controller settings" window is displayed, showing various parameters. "Soft limits ($20)" and "Hard limits ($21)" are set to True. "Homing cycle ($22)" is set to False. "Limit pins invert ($5)" is set to False. The "Write" and "OK" buttons are indicated.