Using Haptics In A Touchscreen - CNC Mill Interface
One of the major benefits of touchscreen technology is the increased operating speed where other input peripherals are not suitable. At supermarket self-serve checkouts, it is simply not practical to use a mouse and keyboard. Similarly with industrial machines, like the CNC mill example below, control terminals are best replaced with a mixture of touchscreens and other control knobs/joysticks.
Touchscreens offer a huge range of benefits, including a compact size and the ability to quickly work with a varying graphical user interface. However their biggest drawback is the loss of tactile response for the user, they no longer feel the ‘click’ of pressing buttons. This leads to user uncertainty (“did that register?”) and ultimately frustration with the product. Adding haptic touch feedback is the most effective way to solve this.
Taptic touch feedback in touchscreens is one of the most well-known examples of the technology. With mobile phones and tablets leading the charge, the added benefits to the user now make touchscreens without haptic touch feedback seem odd.
Using advanced drive signals you can use a variety of patterns to convey information to the operator. Different effects can be used in different situations, like a ‘double-click’ sensation for a ‘long press’ to access additional menus or a strong ramp up for cancelling/starting a procedure. These patterns can be easily created or accessed through different driver chips.
Although eccentric rotating mass vibration motors can be used, the benefits of linear resonant actuators are highlighted in touchscreen applications. With very quick response times and vibrations produced in only one axis, directly towards the user, they are the perfect solution for implementing haptics. Their low profile and self-adhesive backing make them easy to mount.
The inclusion of haptic feedback demonstrates to your customers you understand how they work and you cater to their needs. For help in positioning the vibration motor to maximise the effect of the vibration, we have a series of Application Bulletins that cover mechanical mounting. We also have a larger guide to haptic feedback for more information or contact us below with any questions.
For help in positioning the vibration motor to maximise the effect of the vibration, we have a series of Application Bulletins that cover mechanical mounting. We also have a larger guide to haptic feedback for more information, or contact us with any questions.