Reply to thread

Message

<blockquote data-quote="s-band" data-source="post: 1159522" data-attributes="member: 407744">I suppose it could be an EMC problem but it would need to be a big spike from something that couples to the lines. You could try something like a 10n capacitor across the pulse inputs to ground and/or a resistor, say 1k between inputs and ground. The resistor will drop the impedance of the inputs. Beware that the capacitor may make counting erratic if it is too big a value. It will depend on the cable length amongst other things.A remote possibility might be that the actuator stops on the edge of giving a pulse and vibration tips it over. That seems very unlikely unless there's something loose in the actuator.There are some internal connectors and many socketed ICs. This really is clutching at straws but you could try re-seating them all. There's risk of damage if not done correctly though. Another straw: if you disconnect the pulse inputs and leave it for along time and it still does it, perhaps it's an internal problem.</blockquote>

[QUOTE="s-band, post: 1159522, member: 407744"] I suppose it could be an EMC problem but it would need to be a big spike from something that couples to the lines. You could try something like a 10n capacitor across the pulse inputs to ground and/or a resistor, say 1k between inputs and ground. The resistor will drop the impedance of the inputs. Beware that the capacitor may make counting erratic if it is too big a value. It will depend on the cable length amongst other things. A remote possibility might be that the actuator stops on the edge of giving a pulse and vibration tips it over. That seems very unlikely unless there's something loose in the actuator. There are some internal connectors and many socketed ICs. This really is clutching at straws but you could try re-seating them all. There's risk of damage if not done correctly though. Another straw: if you disconnect the pulse inputs and leave it for along time and it still does it, perhaps it's an internal problem. [/QUOTE]

Verification