For what it's worth, your "X AXIS BALLNUT..." program has the lead-in and lead-out in the back right quadrant (X+ and Y+), for the initial outside profile.
Where do the lead-in and lead-out appear when you use F8/Graph on that program?
Where do the lead in and lead out take place when you run it?
My guess is that, since your X axis movement is evidently correct, your Y axis is backwards.
Graphics showing mirror of machine movement
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Re: Graphics showing mirror of machine movement
cad cam man,
In your first several post posts you said it is cutting correctly but it appears the graph is showing the X axis on the opposite side of where the tool is cutting on the machine. Just to make sure you are understanding the graph correctly. The gray lines are the edge of the cutter and the yellow lines are the center of the cutter.
Looking at your g-code for the circle at the end of the program MasterCam is not posting the g-code out correctly for the circle for the Centroid. It is turning cutter comp on with a G3 move and turning it off on the next move which is another arc then feeding Z down and repeating. Centroid will allow cutter comp to be on with a G1 Z move by it self. With any G0 move with cutter comp on the moves are moved to center of the cut not the comped moves. You will need to check the post in MasterCam to see what the setting that are wrong for circles with cutter comp on.
In your first several post posts you said it is cutting correctly but it appears the graph is showing the X axis on the opposite side of where the tool is cutting on the machine. Just to make sure you are understanding the graph correctly. The gray lines are the edge of the cutter and the yellow lines are the center of the cutter.
Looking at your g-code for the circle at the end of the program MasterCam is not posting the g-code out correctly for the circle for the Centroid. It is turning cutter comp on with a G3 move and turning it off on the next move which is another arc then feeding Z down and repeating. Centroid will allow cutter comp to be on with a G1 Z move by it self. With any G0 move with cutter comp on the moves are moved to center of the cut not the comped moves. You will need to check the post in MasterCam to see what the setting that are wrong for circles with cutter comp on.
Dana
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Re: Graphics showing mirror of machine movement
cad cam man,
I hit submit too soon and had not mentioned about the approach at the beginning.
What is happening that there is not enough distance between the line turning the cutter comp on and the next line that is an arc. What needs to be done the line before cutter comp being turned on needs to be further away so the line turning cutter comp on has move clearance before the arc. Just for testing I took the cutter size down to .031 and the graph showed the approach correctly. So the G1 G41 move before the arc needs to be moved about .250 further away. Right now it is only .01 in X and Y
I hit submit too soon and had not mentioned about the approach at the beginning.
What is happening that there is not enough distance between the line turning the cutter comp on and the next line that is an arc. What needs to be done the line before cutter comp being turned on needs to be further away so the line turning cutter comp on has move clearance before the arc. Just for testing I took the cutter size down to .031 and the graph showed the approach correctly. So the G1 G41 move before the arc needs to be moved about .250 further away. Right now it is only .01 in X and Y
Dana
When requesting support, please ALWAYS post a current report.
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When requesting support, please ALWAYS post a current report.
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Re: Graphics showing mirror of machine movement
I am fairly sure that his Mastercam-generated G code is precompensated for the 0.500" cutter, and that he is using G41 only for wear compensation. In his report, D2 = 0.0000.
The issues Dana points are will become important when the value of D2 is larger.
The issues Dana points are will become important when the value of D2 is larger.
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Re: Graphics showing mirror of machine movement
Sorry I missed about MasterCam being set up just for the G41 as tool wear comp.
For the circle MasterCam is not posting the circle out correctly even with the cutter diameter set to zero.
cad cam man,
After rethinking with the cutter diameter at 0.0 what happens the gray and the yellow are plotted on top of each other. When you put an offset in the gray will be the programmed dimensions and the yellow will be the cutter offset. If you put a negative value in for the cutter cutting oversize on an OD dimension(undersized on an ID dimension) the center line of the cutter moves off the gray making it look it is cutting on the wrong side of grey but it is not. It is moving the correct direction. The cutter is being moved 1/2 of the offset to correct for what the difference when it cuts and what was programmed as the actual size of cutter in MasterCam. The opposite is true when you put in a positive offset.
When you program the cutter comp for the cutter actual size to be comped at the machine you see the gray and the yellow is 1/2 the diameter away from the gray. If you put a negative value in you see the grey stays in the same place and the yellow line moves closer to the yellow by 1/2 of the offset. This move the cutting edge to cut the correct dimension. The same is true when the program is set up for the machine just to do wear comp.
For the circle MasterCam is not posting the circle out correctly even with the cutter diameter set to zero.
cad cam man,
After rethinking with the cutter diameter at 0.0 what happens the gray and the yellow are plotted on top of each other. When you put an offset in the gray will be the programmed dimensions and the yellow will be the cutter offset. If you put a negative value in for the cutter cutting oversize on an OD dimension(undersized on an ID dimension) the center line of the cutter moves off the gray making it look it is cutting on the wrong side of grey but it is not. It is moving the correct direction. The cutter is being moved 1/2 of the offset to correct for what the difference when it cuts and what was programmed as the actual size of cutter in MasterCam. The opposite is true when you put in a positive offset.
When you program the cutter comp for the cutter actual size to be comped at the machine you see the gray and the yellow is 1/2 the diameter away from the gray. If you put a negative value in you see the grey stays in the same place and the yellow line moves closer to the yellow by 1/2 of the offset. This move the cutting edge to cut the correct dimension. The same is true when the program is set up for the machine just to do wear comp.
Dana
When requesting support, please ALWAYS post a current report.
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Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
When requesting support, please ALWAYS post a current report.
Need support? READ THIS POST first. http://centroidcncforum.com/viewtopic.php?f=60&t=1043
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
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Re: Graphics showing mirror of machine movement
I have not had time to read over all the comments in detail but cncsnw is right the cutter comp is only for wear adjustments as mastercam deals with the tool diameter. After adjusting the travel limit and the reversal of the axis x is showing the exact same thing as the graphics as far as it being on the correct side . The y axis is fine there is no problem with it as it has done what the program and what the graphics have shown. As of right now the machine is working as it should the graphics window shows the same thing as the machines moves.
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Re: Graphics showing mirror of machine movement
I would like to add that when using mastercam it will show you and tell you that the cutter comp is either correct or it is not working and that was how I knew there was nothing wrong with that but I do appreciate the heads up
thanks
thanks
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Re: Graphics showing mirror of machine movement
This move is whats called a helical interpolation . Rather than plunging down in z causing the aluminum in this case to gall up and weld to the tool i used this method so it is cutting down in z and around in x and y . For this operation cutter comp is insignificant due to this being a rough out operation. The finish operation will be completed with a boring head. Since I can not use large drills ( large for this machine) I use this to get me close to size . Again thank you for the detailed observation I truly appreciate it as I use every bit of information to learn fromcnc_smith wrote: ↑Tue Nov 09, 2021 9:51 am cad cam man,
In your first several post posts you said it is cutting correctly but it appears the graph is showing the X axis on the opposite side of where the tool is cutting on the machine. Just to make sure you are understanding the graph correctly. The gray lines are the edge of the cutter and the yellow lines are the center of the cutter.
Looking at your g-code for the circle at the end of the program MasterCam is not posting the g-code out correctly for the circle for the Centroid. It is turning cutter comp on with a G3 move and turning it off on the next move which is another arc then feeding Z down and repeating. Centroid will allow cutter comp to be on with a G1 Z move by it self. With any G0 move with cutter comp on the moves are moved to center of the cut not the comped moves. You will need to check the post in MasterCam to see what the setting that are wrong for circles with cutter comp on.