Closed tlohnes66 closed 4 years ago
BarbourSmith
commented
4 years ago Is the issue that when you cut a square it comes out with one side larger than the other, or does the whole square come out too big? If you were to cut a 4 inch square what are the measurements of each side?
tlohnes66
commented
4 years ago I just cut a square that was measured at 3.38 inches on the groundcontrol screen (translated from mm by comparing points) but it cuts at 3x3. Terry Lohnes 503-913-9838 terry.d.lohnes@gmail.com www.linkedin.com/in/terrydlohnes http://www.linkedin.com/in/terrydlohnes
On Thu, Feb 6, 2020 at 6:54 PM BarbourSmith notifications@github.com wrote:
Is the issue that when you cut a square it comes out with one side larger than the other, or does the whole square come out too big? If you were to cut a 4 inch square what are the measurements of each side?
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tlohnes66
commented
4 years ago From FreeCAD using grbl_post to make the gcode file I made a 4x4 box which cut at 3 7/8" wide by 4 1/4" tall.
Terry Lohnes 503-913-9838 terry.d.lohnes@gmail.com www.linkedin.com/in/terrydlohnes http://www.linkedin.com/in/terrydlohnes
On Thu, Feb 6, 2020 at 6:54 PM BarbourSmith notifications@github.com wrote:
Is the issue that when you cut a square it comes out with one side larger than the other, or does the whole square come out too big? If you were to cut a 4 inch square what are the measurements of each side?
— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/MaslowCNC/GroundControl/issues/814?email_source=notifications&email_token=AOPRL7ZZS536SL4HBPL7ZHDRBTEPRA5CNFSM4KRDV3XKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOELBRNYA#issuecomment-583210720, or unsubscribe https://github.com/notifications/unsubscribe-auth/AOPRL77YY3UEKBQT75BENMTRBTEPRANCNFSM4KRDV3XA .
BarbourSmith
commented
4 years ago Hmmmm now I am more confused 😀
If you were getting distorted shapes like the second case I was going to say it is a calibration issue (and that is still my first guess)...however the fact that your first shape came out 3x3 seems to indicate a software issue in generating the gcode because distortion almost never produces symmetrical shapes
tlohnes66
commented
4 years ago It may have to do with MakerCAM also. On the first cut I used MakerCAM on a part I've been trying to get right for a week now, and on the second cut I created a 4x4 job in FreeCAD(which I'm still very new at). I'm moving away from MakerCAM anyway, so I'll focus on FreeCAD. What do you suggest for calibration? Thanks in advance for your help!
On Feb 6, 2020 at 10:13 PM, BarbourSmith notifications@github.com wrote:
Hmmmm now I am more confused 😀
If you were getting distorted shapes like the second case I was going to say it is a calibration issue (and that is still my first guess)...however the fact that your first shape came out 3x3 seems to indicate a software issue in generating the gcode because distortion almost never produces symmetrical shapes
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BarbourSmith
commented
4 years ago Calibration can be tricky and I think is the biggest drawback of the current design.
Are you a member of the forums? https://forums.maslowcnc.com/
You can find a lot more information about calibration over there. Not so many people follow this space since it's really just for tracking Ground Control software bugs.
Were you able to complete the calibration process successfully?
tlohnes66
commented
4 years ago I just signed up to be a member of Maslow forums. I did go through the calibration process when I put the Maslow together but not since. Do you recommend I start from scratch?
On Feb 7, 2020 at 8:39 AM, BarbourSmith notifications@github.com wrote:
Calibration can be tricky and I think is the biggest drawback of the current design.
Are you a member of the forums? https://forums.maslowcnc.com/
You can find a lot more information about calibration over there. Not so many people follow this space since it's really just for tracking Ground Control software bugs.
Were you able to complete the calibration process successfully?
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BarbourSmith
commented
4 years ago Were you previously getting accurate shapes?
If you felt the calibration process went well initially, then I would go through just the short process under Actions -> Set Chain Lengths Automatic which will reset the chain lengths which is quick and could be causing the behavior you are seeing.
tlohnes66
commented
4 years ago So I went through the calibration process again and then cut the same 4" square. It is now symmetrical and within a 32nd of 4". How often should I re-calibrate it? Once a day when I'm cutting? before each cut?
thanks, Terry
On Fri, Feb 7, 2020 at 2:03 PM BarbourSmith notifications@github.com wrote:
Were you previously getting accurate shapes?
If you felt the calibration process went well initially, then I would go through just the short process under Actions -> Set Chain Lengths Automatic which will reset the chain lengths which is quick and could be causing the behavior you are seeing.
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BarbourSmith
commented
4 years ago Excellent! You should never have to calibrate again unless you disassemble and reassemble the machine 😁
If you take the chains off for some reason and want to put them back on use Actions -> Set Chain Lengths Automatic
tlohnes66
commented
4 years ago I'm working on a Meticulous Z-axis sled so I'll set chain length again after that. Thanks for all your help! Terry
On Feb 9, 2020 at 2:35 PM, BarbourSmith notifications@github.com wrote:
Excellent! You should never have to calibrate again unless you disassemble and reassemble the machine 😁
If you take the chains off for some reason and want to put them back on use Actions -> Set Chain Lengths Automatic
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BarbourSmith
commented
4 years ago Absolutely! Happy to help
I'm getting gcode on GroundControl I created in both MakerCAM and FreeCAM that doesn't measure the same as what I started with; sometimes it's larger, sometimes smaller. I've already tried making sure I set the pixels at 96 in MakerCAM, but this happens when I make a project from scratch in FreeCAM as well. I'm tired of scaling over and over and still getting it wrong. Much sawdust with little to show for it. HELP! All I want to do is cut something the same size as what I built on the screen. Shouldn't be this hard. I know I'm a noob at this, so there has to be something I'm doing wrong in both programs.