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Messages - Les.Grant

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TFTs / Re: NHD-5.0-800480TF-ATXL#-CTP electrical noise interfering with touch
« on: July 07, 2016, 12:50:21 PM »
Hi Paul_B,

Thanks for the pointers. I suspect that some of these systems have a noisy earth. If the machine operator touches the metalwork of the machine with the left hand (equalises to the machine potential) and operates the touch screen with the right hand, it works perfectly. If he doesn't touch the machine, it is erratic. The only solutions I can see are to fix the noisy earth or go to resistive touch. Do you think any of your suggestions would work under these circumstances?

Thanks for your thoughts.

Regards,
Les.

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TFTs / NHD-5.0-800480TF-ATXL#-CTP electrical noise interfering with touch
« on: June 21, 2016, 08:31:01 AM »
Hi, Most system with this display work well but we have a small number of systems that are experiencing erratic touch sensing (erratic coordinates) in the presence of electrical noise, typically from an AC motor inverter. Does anyone have a strategy to minimise the erratic behaviour (short of switching to resistive touch!)? I thought of averaging the coordinates but haven't had time to try this yet.
Thanks.
Regards,
Les.

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