Machsupport Forum
Third party software and hardware support forums. => PoKeys => Topic started by: tr5t500 on May 28, 2012, 01:26:15 PM
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Has any had interference activating their Pokeys device? What cured it?
I am getting interference, activating inputs to my Pokeys55 device. This is pretty serious with one event Z axis moved towards table without any input from me. Luckly we were able to hit the e stop before damage.
We have fitted many buttons connected to pokeys to do functions such as auto tool zero, open Mach3, home. etc
We suspect a new power supply used to power new Gecko 540 drive. We are not suspecting the latter as we have had events while no drives were being driven.
Actions we are considering (before reactivating this) are to add a ferrite to the PSU mains cable, and add 0.1uf capacitors to all the input switches.
Comments/suggestions and if possible experience much appreciated.
John.
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With 5v signalling you really need properly shielded wiring on everything so if you have not got that already it may be worth doing.
Hood
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Many thanks Hood.
I have found some suitable sheilded wire from Farnells and will replace all original wires to Pokeys . I will also add capacitors to be on the safe side.
John.
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Also pull up about 1k and 100n cap paralel to switch may help you.
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Many thanks for that. Do you think there is any advantage in shielding pokeys board with metal casing also.
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Hi!
Please first check with pull up and cap. Maybe adding shielding cables could add aditional protection, but my opinion is that cap and pull up should be enough.
Aditional shilding may help if upper measure will not bring satisfactory results.