> On 21 Nov 2017, at 20:27, [email protected] wrote: > > I'm using 24v hall effect proximity switches linked to a mechanical relay to > interface with the logic voltage (3.3v). I am not using a resistor, should I > be adding it on the 24v side or the 3.3v side?
Mechanical relays are a great way to introduce spikes/noise. You could start out with wiring a diode parallel on the coil contact points, so that when the coil is disconnected the induced current (the current will want to keep flowing) of the coil can be dissipated ( not sure if my translation is correct ) Or better: remove the mechanical relays :) > >> On Tuesday, November 21, 2017 at 12:35:44 PM UTC-6, Eric Keller wrote: >> This is obviously a hardware issue that has nothing to do with the software. >> Nothing hooked up to inputs is not that great for noise immunity. A limit >> switch grounding a power supply through a resistor should be pretty immune >> to noise, is that what you are doing? Shields probably not required. >> Eric Keller >> Boalsburg, Pennsylvania >> >>> On Tue, Nov 21, 2017 at 12:13 PM, <[email protected]> wrote: >>> I've managed to get up and running with machinekit except for being able to >>> set up home switches. Even with no wires connected to the home switch pins, >>> the home switch input will sporadically be triggered as soon as the machine >>> is powered up. It None of the stepper motor cables are shielded, but I >>> still would not expect noise to be triggering endstops without any wires >>> leading to the inputs. Is there some way to resolve this issue? Should I >>> physically move the beaglebone away from all the other hardware? Or is >>> something else going on here that I don't understand? >>> >>> My configuration is just the default Xylotex board. >>> -- >>> website: http://www.machinekit.io blog: http://blog.machinekit.io github: >>> https://github.com/machinekit >>> --- >>> You received this message because you are subscribed to the Google Groups >>> "Machinekit" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected]. >>> Visit this group at https://groups.google.com/group/machinekit. >>> For more options, visit https://groups.google.com/d/optout. >> > > -- > website: http://www.machinekit.io blog: http://blog.machinekit.io github: > https://github.com/machinekit > --- > You received this message because you are subscribed to the Google Groups > "Machinekit" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > Visit this group at https://groups.google.com/group/machinekit. > For more options, visit https://groups.google.com/d/optout. -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
