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So far everything looks as expected but you can tell something is wrong. The part is nearly 2" long but the Z axis motor only rotates maybe once as it traverses.Somewhere there should be a setting for configuring the gear ratio etc that says the motor has to turn so far to move a given distance.I also recall something about handling backlash and various offsets that I need to look into.I will admit, I'm still vacillating between giving this up (it's way more work/learning than I had counted on) and plowing on.
But to check this scaling you need to have the motors on the machine. That may be your next step.
Is there a 'trim' function in CamBam where you can lop off bits of drawing?
Having a little trouble with CamBam to sketch a profile for a bowling pin.I need a spline but every time I try I can't get the control points right. If I enter say 3 points, I'll see a dozen or more in the collection list (where you enter the exact coordinates).Nor have I been able to import a DXF drawing and work with that. I haven't figured out how to delete everything except the profile I want.
Thanks Hugh. Yes, I can (I think can) do splines.
I was able to produce workable G-code which matched the spline well. However, CamBam broke the spline into a series of lines and arcs. Open the G-code file in a text editor. If there are only G0, G1, G2 & G3 commands yours is also a series of lines and arcs. Check and let me know.Quote from: zeeprogrammer on April 26, 2020, 06:45:40 PMThanks Hugh. Yes, I can (I think can) do splines.
For positioning I suggest you look at the edit/transform/align function. It will move all of the selected item according to you choices in the box. For a lathe profile you want X-Right Y-top. This puts everything left of the Y axis and below the X axis.I use the alignment tool on essentially every part.
Align to the other side of Y axis.
Normal lathe practice is to set Z0 to the end of stock at the tailstock end. So cutting is always in the -Z direction and Z g-code coords are all negative. But if this works for you have at it. All your setup does is displace all the Z coords. But you'll find it easier to actually set Z0 by touching the free end of the stock.