bridge saw cutter for marble with rotating table
I am working on a project, to convert an old bridge saw cutter for marble with rotating table for the work piece
to a cnc milling machine. My question is how to configure the kinematics of the 4-axis system.The tool is a disk saw (20cm .. 30cm diameter)
that moves in x,y,z axes and at the same time the work piece table can rotate when making curves.
I am going to use servo drives with analog reference inputs and incremental encoders for feedback.
For the logic interface I will use some mesa cards.
Any suggestion for the appropriate cam processor for the gcode generation of dxf files?
I am already familiar with linuxcnc and mesa cards that i have used in the past on other projects.
Thank you in advance.
George
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Do you need to coordinate the table rotation to the other motion, or us it largely indexing?
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The tool is a disk saw (20cm .. 30cm diameter)
that moves in x,y,z axes and at the same time the work piece table can rotate when making curves.
I have difficulty picturing this. How are you cutting a curve with a disk saw?
[edit]
Is like at 1:07 in this video (only in your case the work piece rotates)?
If so you don't need any special kinematic in LinuxCNC.
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[edit]
Ok, I maybe kind of get it. For the mentioned cases above. You'd want to rotate the C table so the saw remains tangential to the curve and you'd then need the kinematic to adjust the XY-position according to the C axis angle.
For this you could use for example the included XYZAC-trt kinematic and just ignore the A axis.
However you would need a way to calculate C-axis angles depending on the tools position along the arc.
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The table (C axis) is rotating relative to Z axis, which is perpendicular to XY plane.
The disk diameter could be 20cm in minimum.
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[edit]
Should be possible, I guess. If the calculation of the c-axis angle could be integrated in the XYZC TCP kinematic then you might not even need a CAM. It would just be a regular 3 axis gcode.
I'm not sure I'd want to be the one responsible for writing the c angle calculations though. Just imagine the mayhem if it missed a discontinuity in the math and the resulting angle suddenly changed from positive to negative.
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sheetcam.com/Register/purchase
[edit]
seems this user also uses the SheetCAM solution for this.
www.forum.linuxcnc.org/10-advanced-confi...h-xy?start=50#248422
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instead of rotating the disk saw, the table rotates.
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- tommylight
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Posting a real picture of the actual machine would save us a lot of time trying to guess, so why don't you?The machine is similar to the one in the picture.
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The picture you posted, that is not of your machine, i have seen those and have access to if the need arises, but much bigger. Same everything, but bigger, Italian made, NC controlled, etc.
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