Machsupport Forum
Mach Discussion => Brains Development => Topic started by: jw1618 on February 04, 2016, 06:13:55 PM
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Is there a way to use the Step/Dir of X and Y to turn a stepper between 0-360 so that it will essentially point in the direction the the cnc is moving? kind of like how a pick and place head rotates?
Any help on this is appreciated.
Jamie
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Could you not just use Tangential Control ??
Tweakie.
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Yes! That is what I was looking for. Thank you! I have some reading to do to get this set up. I came across a video on YouTube and the comments were saying that it isn't supported anymore and to write it buy hand. I hope there is a way to still get it set up. Any idea if this can work on files other than 2.5d?
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There are a couple of issues but some versions of Mach3 work better with Tangential than others (unfortunately I do not have a definitive list of which are best) and yes it will work with 2D files.
Tweakie.
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Ok, I got Tangential settings working better than I thought they would. I'm using it with a wire feed welder so I will have to get it to work without continuously rotating so it won't rap up the cords. Is there a way to do this? my a axis soft limit was set to 0-100 and it was still a continuous rotation.
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Ok, I got Tangential settings working better than I thought they would. I'm using it with a wire feed welder so I will have to get it to work without continuously rotating so it won't rap up the cords. Is there a way to do this? my a axis soft limit was set to 0-100 and it was still a continuous rotation.
If you attach your .xml file - the one from your Mach3 folder named <your profile>.xml (typically Mach3Mill.xml) I can take a look at your settings and maybe suggest a way. Copy and rename your .xml file to Jamie.xml then use the Reply button and select Additional Options to attach the file.
Tweakie.
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Ok. I thought it might be the setting in General Configuration, Rotational soft Limits. So I checked it and set soft Limit to max 360 min 0 but I just kept getting soft limit warnings. after running it anyways it continued rotating instead of limiting non-continuously. I have no idea if that's what its even for or if it will work with Tangential on.
Jamie
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Sorry but your .xml did not post correctly so I am unable to test your set-up here. If you post it again it will have to have a unique name (i.e. Jamie2.xml).
Tweakie.
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I don't hink that Mach3 can directly do what you are needing for a robotinc welder and it cannot do Joint kenimatics so that you woul dhave world point jogging. Or joint kenematics so that when you rotate a joint teh toolpoint stays teh same.
You can however program all joint motions as each a seperate motion AND mach3 can symotanoiusly move up to 6 axis .
Tangent control does its own thing assuming it has a full 360 continous control as it can continously rotate a joint without limits IF it needs to UNLIKE Gcode motion where SOMETIMES teh joint has to be unwound back to Zero. OR cannot exceed a certain angle and THAT would be controlled from CAM and the post.
Also for the most part Tang control is busted in several ways.
There is a reason MOST robots do not use Gcoded motion (;-)
Just a thought, (;-) TP
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That said IF you could come up with a linear formula based on XY motion to position A then you might be able to make Formulas work in your favor.
(;-) TP
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Hi Jamie,
I have sent you a PM.
Tweakie.