A Manualplus 620 ICP ball-handle contour can fail even when the arc geometry is valid because the editor assigns tangency differently from SYMplus. In Manualplus 620, mark the current R6 element as tangential; do not wait to apply tangency to the following R40 element.
Confirmed root cause
The failed contour began with an R6 arc defined by I0 and K-6, without known X and Z endpoint coordinates. The decisive error was the placement of the tangential-transition attribute. Manualplus 620 requires that attribute on the R6 element itself. The reported workflow in SYMplus instead applies the tangential connection when defining the following R40 element.
| Editor | Where to define tangency |
|---|---|
| Manualplus 620 ICP | On the current R6, I0, K-6 element |
| SYMplus | On the following R40 element |
Why the contour is difficult to resolve
The first counterclockwise R6 arc has center data I0 and K-6, but neither X nor Z is supplied for its endpoint. The following R40 geometry also relies on tangential relationships rather than complete endpoint and center coordinates. Consequently, the editor must derive missing geometry from the declared continuity constraints. Assigning tangency to the wrong element prevents Manualplus 620 ICP from resolving that chain.
The evidence also names Manualplus 4110 as a controller on which the contour was attempted, but it confirms the tangency correction specifically for Manualplus 620. Verify the equivalent selection behavior directly in the 4110 editor rather than assuming both editors handle the attribute identically.
Correct the ICP element sequence
- Create the first R6 arc with I0 and K-6.
- On that same R6 element, select the tangential-transition option in Manualplus 620 ICP.
- Continue with the counterclockwise R40 arc using the tangential relationship to solve the missing endpoint.
- Continue the remaining tangential arc chain toward the defined endpoint X24, Z-60.
- Finish with the non-tangential straight segment of length 20 mm.
The evidence describes the final clockwise arc as R24, while an attached image label identifies that stage as R20. Because the available text and image label conflict, confirm the radius from the controlled drawing before entering that element.
Prevent circle endpoint errors
Do not reduce calculated intersection coordinates to two decimal places before entering them. The reported endpoint of the first R6 circle is X9.882, Z-2.596; entering Z-2.60 was identified as too coarse and caused a circle endpoint error. Configure the CAD dimension output for three decimal places when transferring resolved points.
This precision issue is separate from the tangency-placement error. Correct coordinates cannot compensate for a misplaced tangency attribute, and correct tangency cannot make rounded endpoints geometrically consistent.
Verify the resolved contour
- Confirm that ICP resolves the R6-to-R40 transition after tangency is assigned to the R6 element.
- Check the first resolved circle endpoint against X9.882, Z-2.596 when using the geometry described in the evidence.
- Confirm that the later arc reaches X24, Z-60 and that the closing straight segment is 20 mm long.
- Verify the disputed final-arc radius against the drawing before approving or machining the contour.
- Run the controller's graphical contour check and confirm that no circle endpoint error remains.
FAQ
Why will Manualplus 620 ICP not resolve the R6-to-R40 contour?
Manualplus 620 requires the tangential-transition setting on the R6 element defined by I0 and K-6. Applying tangency only when creating the following R40 element follows the SYMplus workflow and leaves the ICP chain unresolved.
Why does the controller report a circle endpoint error?
Rounded coordinates can make the endpoint inconsistent with the specified circle. Use X9.882, Z-2.596 for the reported first R6 endpoint rather than rounding Z to -2.60, and retain three decimal places during transfer.
Is the final clockwise arc R20 or R24?
The text specifies R24, but an attached image label says R20. Treat the radius as unresolved evidence and verify it against the controlled part drawing before programming or machining.
