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Type: Posts; User: TomKerekes

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  1. Replies
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    Re: Acramatic 2100 retrofit

    Hi cwatson1982,

    Hard to say without information or context but G19 G2 switches the plane to YZ and attempts an arc in that plane and also in any subsequent arcs.
  2. Replies
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    Re: Acramatic 2100 retrofit

    Hi cwatson1982,

    If you post a GCode fragment, your KFLOP and KMotionCNC settings we might be able to see something.

    If you want to do a thorough analysis of what is happening you might capture...
  3. Re: Tool length Offset activated as part of Initialization file

    Hi Dan,


    It's more common to have the Homing Program Zero the KFLOP coordinates (Machine Coordinates) rather than setting an offset.


    See the SetFixtureX.c, SetFixtureY.c, SetFixtureZ.c...
  4. Replies
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    Re: Cutter Comp error?

    Hi Murray,

    I've been trying to find a solution/workaround.

    That makes sense. Imagine a polygon like an octagon. A cutter can go around the outside and cut a perfect polygon, but can't go...
  5. Replies
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    Re: Rough Finish on 45 Degree wall

    Hi Troy,

    Strange. Maybe make a Move on the Step Response Screen for clues. Maybe try swapping the X Y Drives and Motors to isolate whether it is the Motor or Drive.


    Lower torque shouldn't...
  6. Replies
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    Re: Rough Finish on 45 Degree wall

    Hi Troy,

    Regarding DMM Parameters:

    Max Acceleration - maybe changes the torque response time? I suppose it could be somehow autotuned?

    On Position Range - can't imagine how that could be...
  7. Replies
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    Re: Rough Finish on 45 Degree wall

    Hi Troy,

    As Murray points out in Torque mode the drive should just be applying commanded current so there shouldn't be any tuning for load.

    Not sure what you are referring to. Do you have ADCs...
  8. Replies
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    Re: Rough Finish on 45 Degree wall

    Hi Troy,

    I think you are in mm mode rather than Inches.
    0.01 x 20325 / 25.4 = 8 counts

    The way to troubleshoot these types of issues is to break it down to categories of:

    1 -...
  9. Replies
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    Re: Rough Finish on 45 Degree wall

    Hi Troy,

    I think Murray is right. We know the friction is about 500 DAC counts and stiction could be higher. So with an error stuck at say 0.001 inch the Integrator would ramp to 500 and with a...
  10. Replies
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    Re: Rough Finish on 45 Degree wall

    Hi Troy,

    I wouldn't expect it to be tuning. Did you change the Input gain? What if you do a large move? You might do a move of that size on the Step Response Screen.
  11. Replies
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    Re: Rough Finish on 45 Degree wall

    Hi murray70,

    Sounds like they are magnetic/hall sensors which would be an absolute method providing a few analog cycles per revolution which are then highly interpolated and output as incremental...
  12. Replies
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    Re: Rough Finish on 45 Degree wall

    Hi Troy,

    Hoping this works out better.

    It does seem like there is some noise or quirk in the encoder position. Here is a zoom in:

    442334
  13. Replies
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    Re: Rough Finish on 45 Degree wall

    Hi Troy,

    Might be too early to celebrate :) The errors are still quite large. There is often a trade-off between smoothness and performance/accuracy.

    Is the resolution still 20325...
  14. Replies
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    Re: Acramatic 2100 retrofit

    Hi cwatson1982,

    Good now we know the resolution is 83230.72 counts per inch. This can be use to relate errors in counts to errors in inches.


    Yes always reduce gains to have smooth stable...
  15. Replies
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    Re: Acramatic 2100 retrofit

    Hi cwatson1982,

    ok no filters so far.

    Encoder data actually seems smooth and clean not noisy. Some ringing either do to shock to system or borderline stable system. You might try turning down...
  16. Replies
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    Re: Acramatic 2100 retrofit

    Hi cwatson1982,

    Please post the IIR Screen otherwise we have no idea what it is configured as.

    If you do a move of 832307.2 does it move 10inches?

    I see from your big moves of 600000...
  17. Replies
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    Re: Acramatic 2100 retrofit

    Hi cwatson1982,

    Use the "Move" button not the "Step" button.

    Display the Output also.

    Include larger moves over longer times.

    Also post your Config and IIR Filter Screens.
  18. Replies
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    Re: Acramatic 2100 retrofit

    Hi cwatson1982,

    If you post your settings and the plot data we might be able to help. Also your Axis resolution in counts/inch.
  19. Replies
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    Re: Spindle set up and tapping

    Hi Ben,

    There should always be some stable value if you make it small enough.

    Your gains all seem very small. Maybe you have a large factor somewhere? Please post all your settings Config,...
  20. Replies
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    Re: Acramatic 2100 retrofit

    Hi cwatson1982,

    Well as it says in the article analog signals are inherently imperfect so it is difficult (and unnecessary) to be able to command a speed of exactly zero. Without feedback it is...
  21. Replies
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    Re: Acramatic 2100 retrofit

    Hi cwatson1982,

    You might read this article on drift in the wiki.
  22. Replies
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    Re: Look ahead blocks in KMOTIONCNC

    Hi Amit,

    The Interpreter/Trajectory Planner works ahead as many GCode Blocks as necessary until the planned motion is that amount of time ahead of the current machine position. This can...
  23. Replies
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    Re: Spindle set up and tapping

    H Ben,

    Same as a Servo. Except gains might be low and response much slower. Test with Step Response Screen.

    Remove the Feed Forward and try only small P Gain.



    Reduce gains until stable.
  24. Replies
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    Re: Spindle set up and tapping

    Hi Ben,

    Sorry somehow I missed this Thread.

    I'm not sure why you don't want to operate the Spindle like a Servo. That would make things simpler and more accurate and facilitate tapping.

    Yes...
  25. Replies
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    Re: Setting Zero and divide by 2

    Here is a patched Version of KMotionCNC.exe for 4.35b. Copy to C:\KMotion435b\KMotion\Release
  26. Replies
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    Re: Hurco BMC20 Dynomotion Retrofit

    Hi Troy,

    In KMotionCNC | Tool Setup | Tool/Setup Files | Main Dialog Face should be "Custom" and your Screen Script.


    Yes. Sorry my mistake.


    That is all very strange. Adding in dead...
  27. Replies
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    Re: Hurco BMC20 Dynomotion Retrofit

    Hi Troy,

    It should be ok. Just make sure your Screen Script is configured in KMotionCNC and not any of the non-custom dialog faces.
  28. Replies
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    Re: Hurco BMC20 Dynomotion Retrofit

    Hi Troy,

    I think this happens when your Init file tries to click a Screen Script Screen Button when KMotionCNC is not configured to use a Custom Screen Script. This puts KMotionCNC in an unstable...
  29. Replies
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    Re: Rough Finish on 45 Degree wall

    Hi Troy,

    Here are the files plotted. We didn't get all the data for some reason on the last one, but there is enough.

    441344
    441346
    441348
    441350

    Murry was correct the 150 puts the...
  30. Replies
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    Re: Hurco BMC20 Dynomotion Retrofit

    Hi Troy,

    I can't see anything wrong. When you push the Feedhold button does Bit 58 (the Feedhold LED) always come on?

    Is this printed on the console? printf("Decel time = %f\n",...
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