Re: [CAD_CAM_EDM_DRO] Rotary Axis home and/or limit switches

But why do you need a limit switch on a rotary axis if it's meant to go
round and round? because it's going to see the 'limit' switch over and over.
The 'homing' switch should be ignored except on homing.

Roland

On 5 February 2010 16:27, ya_nvr_no <yanvrno@...> wrote:

>
>
> I have added a couple of rotary axis's But am having an issue with coming
> up with a good way to home them. One switch gives me a home position but if
> I rotate one revolution the switch is made again. I am using CNCpro, it uses
> a limit switch as the home switch.(would another program handle this
> better?)
>
> So for example, an issue on the B & C axis.
> Do I home at somewhere >90 degrees then move the B axis to the vertical
> position once I know what that angle is? Manual Zero this location.
> Home the C axis and then rotate it ~180 to find the center of the truncated
> 360 degree rotation? Manual Zero this location
> And on an A table axis I would be limited to less than 360 degrees.
>
> My options are:
> Using a M code or manual toggle switch to disable the homing/limit switches
> after homing
> or
> Using both home and limit switches, create a logic IC circuit/or PLC that
> determines conditions.
>
> I've searched but find no info on how this is handled.
> There has to be a straight forward way to handle this.
> Thanks for any HELP/Direction
>
>
>


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