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Aiming axis
« on: February 04, 2016, 06:13:55 PM »
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

Offline Tweakie.CNC

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Re: Aiming axis
« Reply #1 on: February 05, 2016, 03:21:05 AM »
Could you not just use Tangential Control ??

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: Aiming axis
« Reply #2 on: February 05, 2016, 04:39:56 AM »
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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Re: Aiming axis
« Reply #3 on: February 05, 2016, 05:39:32 AM »
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.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: Aiming axis
« Reply #4 on: February 15, 2016, 06:24:43 AM »
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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Re: Aiming axis
« Reply #5 on: February 15, 2016, 06:54:55 AM »
Quote
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.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: Aiming axis
« Reply #6 on: February 15, 2016, 12:00:27 PM »
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

Offline Tweakie.CNC

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Re: Aiming axis
« Reply #7 on: February 15, 2016, 12:13:08 PM »
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.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

Offline BR549

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Re: Aiming axis
« Reply #8 on: February 15, 2016, 12:56:28 PM »
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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Re: Aiming axis
« Reply #9 on: February 15, 2016, 01:06:31 PM »
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