Transcript int_tips
MicroTouch On the Move MicroTouch Touchscreen Integration Tips and Techniques Paul Hatin & Mark Roberts Touch Sensor Construction Electrodes Glass panel Anti-Glare Touch coatings Front, rear Electrodes ClearTek Overcoat Glass Panel Rear Shield Coating Anti-Glare Conductive Touch Coating ClearTek Overcoat MicroTouch Capacitive Sensor Technology Special electrodes linearize the voltage field Voltage is applied to 4 corners. Current flow from 4 corners is measured and position is calculated MicroTouch Controller Technology • Power – +12 volts supplied through orange wire • Touch working – Tap the Touchscreen, LED should flash • Communications with System – Power on system, should find the controller – If not, turn power off – unplug the Touchscreen – power back up Materials and Tools • Recommended Materials – Double Sided Tape (touchscreen - display) • 3M 4416 (1/16” thick) 8 pieces (1.5” long) • 3M 4408 (1/8” thick) 8 pieces (1.5”long) – Closed cell single sided Gasket (bezel - touchscreen) • Volara 2AF • Epilon FR – Cloth Tape • Ideal Brand Therm-X No. 724 • Tools – Isopropyl Alcohol – Lint free cloth – X-acto Knife Removing the Touchscreen • Peel away gap tape • Use X-acto knife to cut foam tape from top, left, right sides from the outside edge • Lean Touchscreen forward & cut bottom tape from between Touchscreen and Display. Preparing Display & Touchscreen • Use Isopropyl Alcohol and soft lint free cloth • Clean the surface of the Display • Clean the inside surface of the Touchscreen Alignment of the Touchscreen • • • • Align the Touchscreen both horizontally and vertically with the tube/LCD Cover the air gap • Use the Black Cloth tape • Cover the perimeter of the Touchscreen fully covering the space between the Touchscreen and Display Preparing Power for the Controller • Orange - +12v, 60ma max, 47 ma typ, 400 mv max ripple • Gray - Power Supply Ground • Green - Chassis Ground, as short as possible • Gray/Green - Can be combined to Chassis Ground