Homing issue

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  • July 15, 2016 at 12:38 pm #9841
    jpmunic
    Member

    After sending a homing command to a particular axis, 2/3 of the time the actuators will behave correctly, but about 1/3 of the time the actuator will hit the switch, stutter for a second, then continue moving in the direction of the switch at search velocity until either the switch is released (because I moved it) or the stop command is given (!%). It does not then change direction and move at latch velocity after the switch is released. If I send a homing command for all three axes, this issue tends to happen with the third (y) axis.

    What is going on?

    July 18, 2016 at 5:29 am #9849
    cmcgrath5035
    Moderator

    tinyG or G2?
    What sort of switches(mechanical, proximity, etc)?
    Shielded wiring used to switches?
    Shields grounded properly?
    Post your parameter set to a cloud file and provide a URL.

    Have you reviewed this:

    August 1, 2016 at 9:21 pm #9861
    boomer3
    Member

    I have experienced the same thing with my Y axis. If the gantry is too close to my mechanical limit switches when i try to home it (approximately within 150mm), it hits the limit and tries to keep going until i kill it.

    I notice that when I pull my y axis back further than 150 or 200mm and start the G28.2 homing command, it goes for about 20mm and then the motor pair makes a blip sound almost as though it’s doing an instantaneous stop start. As long as it does this, it will consistently stop when it hits the limit switch. Odd I know, but I have not tried to figure out there logic there yet.

    August 2, 2016 at 7:34 am #9863
    cmcgrath5035
    Moderator

    Odd behavior indeed.
    What are you using to communicate with your machine? Chilipeppr/CoolTerm, ?

    Posting your parameter set ($$ dump) to a cloud drive and providing a URL will tell us a lot about your machine and short-cut a whole bunch of questions.

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