Unexplained asymmetry in milled part<resolved, Head tram is way off>

[apm]

I am new to programming up my Allin1DC system using intercon. I am getting an odd assymetry that I just can't explain;

To start I set my zero point on my work coordinate system. Before loading 0,0 appears right under the screw to the side of the photo as noted;

Yet when I am done the thing somehow "shifted" maybe 0.050" off. See a photo of my caliper readings of both sides of the part. Nominally I should really be about 0.250 on both readings or at the very least equal distant. (I have been playing with some offsets to clean up the part)

I don't have autohoming setup yet but all I did was run an indicator around 0point, establishing the center. Then I used the autohome buttons which set me to 0,0 right at that spot. I am 99.9% confident I had the zero setup correctly right there.

Here's my code,

So how is this happening? Is there another work coordinate system that I am missing that is somehow off, or is there an issue with how intercon is processing my G code?

[apm]

Just to add to this discussion here. The way I set my zero was as follows:

With the feeds off I crank the table and indicate my zero has any machinist would do. I hit the machine cycle start buttons and the zero zero coordinates all pier on my work coordinate system which is coming up as WCS #8 by default. If somehow I find I'm not happy with my zero upon indicating, I get to a position. Then I will hit F1, where I just hit the F10(set) on the part position to set my zero.

The end result is as follows;

From there I just navigate to The load button, load my CNC file and hit start cycle assuming it's going to use the zero coordinate system shown in the image above. The only thing that seems to remotely make sense is if somehow I'm operating the program on a different work coordinate system. How would I figure that out? Or is there a different error that I'm not familiar with?

[apm]

A little more troubleshooting on my end and I am still having issues.

I watched some youtube videos on WCS and set my G54 to 0,0,0 with my dial indicator

I added G54 to my intercon code to make sure that it was good

Here's the program clearly running on G54

I played with my tool offset to get a good skim cut and used dykem blue as a reference witness to show I cut all around but there's still a clear 0.050-0.060" offset towards the front of this part.

When all done I freed up the axis and reindicated the part. It was a little unsettling as the assumption would have been that the Y axis would be at 0 just like the X axis but indeed the Y was +0.0067" but that's still not enough to explain the 0.050-0.060" difference I am seeing as to this part being centered. I am a little concerned why it didn't perfectly repeat but so far when I do multiple passes there's little overcut so I am hoping this was operator error and don't believe it linked to the greater issue.

At this point I am stumped, all my code I think appears to indicate that I should be right in the center with the middle hole which is my 0,0 point, but it's off 0.050-0.06" any ideas?

[cnckeith]

Sounds like you're mixing up work coordinate systems and machine home position?

https://www.autodesk.com/products/fusio ... made-easy/

[apm]

Sounds like you're mixing up work coordinate systems and machine home position?

https://www.autodesk.com/products/fusio ... made-easy/

In this case I haven't actually set up my limit switches to define a true machine home. My goals for this machine was more or less to wind up with a manual milling machine that I could program to run contours such as this part. So at least by my figuring I would just set the home position where ever it is when the machine turns on, and then go from there.

Is this mentality wrong?

Now with where I am I want the origin point at the center of the bushing. I have done everything I can think of to tell the machine that that is my origin. However somehow it appears when I go to mill the final contour the origin point that the machine uses is shifted 0.055" or so forward. Where am I possibly going wrong?

[cnckeith]

post a fresh report.zip to give me the info to help you.

[apm]

I turned on the machine and used the F7 to create a report which is seen below. I didn't home it or anything. Will this contain all the info of what I was doing last night around 10pm on the machine that you need to troubleshoot or do I need to run the report when I actually have the machine setup the same way as I was cutting?

[apm]

Hi Keith,

I thought I'd follow up as I am pretty much stuck here until I can get past this, did that file have the info that is needed or does the report need to be generated when the machine is all setup and either running that program or right after?

Thanks,

Adam

[centroid467]

The report should have the settings that need troubleshooting. So, if you made any changes to the configuration then it would be a good idea to revert to the settings used to run the job.

[cnckeith]

when using "jog to home" postion.

power up

1.) jog the machine to the home position. for a mill Typically max negative in X, max positive for Y and max positive for Z
review axis naming and direction conventions here https://centroidcncforum.com/viewtopic. ... 437#p28437
to make sure we are all on the same page.

2.) then use the part setup menu to define the part zero position (g54). which matches the fixture to the intercon program.