# Touchscreen {% hint style="success" %} **📅Update: 2020/05/17** {% endhint %} Rotrics 3.5-inch touchscreen can control robot arm motion and module functions. You can also download G-code files into SD card, and use touchscreen to control offline. ## User Interface ### Homepage
**Wi-Fi Connection** Wi-Fi connection status icon, press to check Wi-Fi connection status, **Return** The return button, press to return to the previous menu, **HOME** The homepage button, press to return to homepage, **Emergency Stop** The emergency stop botton, press to stop robot arm, use only in emergencies, **Basic** The basic control interface, to control robot arm movement in X, Y, Z axis, or reset robot arm to origin position, **Laser** The laser control interface, to control robot arm movement in X, Y, Z axis and power on/off laser, mainly used for adjusting laser focus length, **Draw** The drawing interface, to select built-in stick figure to draw. It is mainly used to teach children. **3D Printing** The 3D printing control interface, to change filaments, **Air Pick** The air pump box control interface, to control action of suction cup and softgripper, **Voice** The voice recognition function interface, press to start recognize your voice, **Teach\&Play** The teaching-playback function interface, to teach robot arm to record and repeat your movement, **SD Card** The SD card management interface, to choose relevant G-code file and start writing/drawing, laser engraving, 3D printing or picking/placing offline, **Setting** The setting interface, to choose language, set leveling, adjust pen height, or reset the touchscreen. ### Basic Control
**X±/Y±/Z±** Control the movement in X, Y, Z axis, click to control movement in relevant direction, **Home** Working HOME position button, click to return robot arm to the HOME position, **Reset** Robot Arm calibration button, click to re-calibrate the robot arm. **Motor Disable** Motor disable button, click to disable the motor, drag the robot arm to the corresponding position. ### Laser
Laser ON/OFF Laser on/off button, click to turn on or turn off the laser. The default setting is to turn on/off laser under the max power. **Wear the Safety Goggles before you set up the laser engraver and throughout the laser engraving process.** ### Draw
Click the left and right triangle buttons to switch pictures, click "Choose" to select the relevant picture. **Start / Pause / Stop** Click the corresponding button to start, pause, stop the current working. ### 3D Printing
**Target Temp** Target temperature of 3D printing nozzle, **Current Temp** Current temperature of 3D pinting nozzle, **Change PLA** PLA filament change button, click to preheat nozzle to 200℃, after temperature reaches 200℃, you can change the filament, **Change ABS** ABS filament change button, click to preheat nozzle to 240℃, after temperature reaches 240℃, you can change the filament, ### Picking/Placing
**Pick/Place** Pick and place button, click to control suction cup or softgripper to pick/place items, **Stop** Click to stop air pump box, ### Voice
Voice recognition button, Wi-Fi connection required, support multi-language. Click to recognize voice content, and then command robot arm to complete relevant tasks. Currently, only the built-in picture drawing functions are available. ### Teach\&Play
### SD Card
The G-code excution interface, click to choose relevant G-code and start working. ### Setting
Setting interface of the touchscreen, click to adjust pen height, set 3D printing leveling, connect to Wi-Fi, change language, reset the touchscreen. ## Connect with DexArm Use dual Type-C cable to connect robot arm and the touchscreen. Click the following link to learn how to use touchscreen to adjust laser focal length, change 3D printing filament, leveling: * adjust laser focal length * 3D printing work origin position setting * leveling * 3D printing filament change * control pneumatic module * control teach\&play ## Control DexArm's Movement 1\. connect touchscreen to the robot arm 2\. Click `Basic` 3\. Click `Home`to move robot arm to HOME position 4\. Click X, Y, Z button to control robot arm movement. ## Use SD card to work offline 1\. Copy the G-code file into SD card 2\. Set paremeters before run the G-code file * For laser engraving, maker sure you have adjusted the focal length and set the origin position * For writing/drawing, make sure you have set the start height value * For 3D printing, make sure you have set the start height 3\. Click SD card 4\. Choose your G-code file 5\. Click `Start`to work offline ## Touchscreen Recalibration Touchscreen recalibration is added in Touchscreen firmware V1.1.0 or above. Please confirm your touchscreen firmware version before recalibration. Method 1: Touchscreen > Setting > Factory Reset > Touchscreen Recalibration Method 2： Add an empty file named "touchscreen\_recalibration.conf" to the directory: sdcard\firmware. If the Touchscreen reads this file during startup, it will enter the recalibration. ## SetWorkOrigin & SetWorkHeight Difference For G-code generated by Rotrics Studio, the working start point is X0 Y300. So when 3D printing with the touchscreen, you need to set G92 Z0 E0 (Set WorkHeight).
For G-code generated by third-party software, like Cura, the working start point is X0 Y0. So when 3D printing with the touchscreen, you need to set G92 X0 Y0 Z0 E0 (Set WorkOrigin/ Set Origin).
Note: if you set the working start point wrongly, the Arm movement will beyond limits, or when you click start to start printing, only the filament squeezes out, the Arm won't move.