Multicam 3000 series router post problem with z axis

[plasticsVM3PD]

I'm attempting to run a program with our Multicam 3000 series router using the multicam iso post from the fusion library. When beginning the program, the tool plunges to the table to start the first pass instead of the o.25" roughing passes that are supposed to be contained in the program. I'm not well versed in G-code or know at all what should be there and what shouldn't but will attach the program. Any help would be greatly appreciated.

[serge.quiblier]

Hello @plasticsVM3PD 

Apparently the multicam post in the library have a very strange and specific behavior.

Normally on others machines when we are going up, it's toward the positive values, and down is going toward the negative.

But this post is set inversly.

So when on others posts, being over the part if for example Z15, here it's Z-15.

Are you sure your machine behave the same way or not?

As I have not written this post, and i can't find any documentation, I am unable to control if this behavior is standard and correct for all machines.

Regards.

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[plasticsVM3PD]

Yes, I think what you're saying is accurate. when the machine travels upward in Z, its a negative number. Table surface is Z=0. So when plunging in a program, it should be a positive travel movement, but it's still in negative numbers. Is it possible that my WCS is just flipped the wrong way? Currently I have it set just as a would for our mill with Z pointing upward and the origin is at the top corner of the stock.

[plasticsVM3PD]

Ok, I think I've solved the issue by making the top of the material Z=0 instead of the table. I don't think I had to do that when I ran the tutorial "intro to 2D machining" part on this machine, but I think I did have to move my WCS to the bottom of the material in order to accomplish the same goal. But so far the program is working as it should. Thanks for the help

[serge.quiblier]

Hi @plasticsVM3PD 

The wcs in Fusion is always following the "right hand" convention: X is the thumb, Y is the index, Z is the middle finger.
If the machine does not follow this convention, it's the post processor job to alter the direction (sign) of the axis.
If on the machine, the setup is Z0 on the table, then in Fusion, you should create the wcs at the bottom of the stock also.
Regarding the Z coordinates sign, this is defined by the following line in the post:

var zFormat = createFormat({decimals:(unit == MM ? 3 : 4), forceDecimal:true, scale:-1});

You can change this line to

var zFormat = createFormat({decimals:(unit == MM ? 3 : 4), forceDecimal:true});

If the coordinates are inverted, with the wcs in the correct location.

As the post had been created by somebody else, a long time ago, we don't have any references, on why it was inverted.
Was it on a specific line of machine? On all machines?
I can't tell.
But I am giving you pointers on how to "fix" the post if needed.

Cheers

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