Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: Jimster on January 18, 2014, 09:48:35 AM
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My machine worked perfectly a few days ago, but now I'm unable to move the z axis in negative direction, I've tried turning off safe limits, is there anything in the software which could be stopping an axis move in a direction?
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I'm pretty sure it's something I've done wrong with mach3, as I can move the axis on the motor tuning plugin.
I've attached my xml config, can anyone see anything wrong here?
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Are you possibly running into a soft limit or dont have the axes homed?
Hood
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I've tried turning soft limits off and still the same issue. I've also tried with and without homing the machine.
I've now renamed the mach3 folder, and done a fresh install, copied over my XML file and get same problem.
Really got me confused this one. If I try to configure the plugin for the controller, I can make the motor spin in both directions buy selecting the option circled in red. But I can't jog the axis using the arrows on the same screen.
Surely this means the hardware is all ok still, but it's a software issue?
Edit - I know the screen shows the Y Axis, but I was tesing the Z axis, just went back for a screen shot
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I've now disconnected the drive belt going to the axis, just to rule out any physical problems. Sadly still the same issue, really starting to pull my hair out now :(
Has anyone got any thoughts on what I can try next?
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Couple of things to try, first is I would not have the Set Axes to Zero on Reet chosen when using the IP-A as it reads position from the encoders so it is preferable to have that option disabled I would say.
Also disable the other settings to the right for smart limits and auto z inhibit. I am not sure exactly what they are for and cant recall how I have them set but its worth a try.
BTW they are in Plugin and on Special Functions then Other.
Hood
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Thanks hood for you help (AGAIN!!!) :D, I've just changed those settings, I'll head out now to the machine to try it.
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:( Sadly the still the same problem.
Also when I try to run a program, when the Z axis tries to move I get a Estop button pressed message
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Ok what I would do is swap axis setups in the plugin for maybe X and Z and see if the Z (really X) has problems or whether it is the X (really Z) that still has them.
Hood
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I gave that a go, and the problem moved to the real x axis, so I knew it had to be a software limit somewhere.
I remembered then that I unplugged my touch probe while having a tidy up the other day, for some reason in order to get my probe working I had to reverse the input for my probe, so when I disconnected it mach3 assumed the probe was active so limited z axis, easy fix! Feel stupid now. Thanks for the help anyway.
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The CSMIO has an option for probe safety and that is most likely why you could not lower the Z. Alls well that ends well I suppose :)
Hood