Tutorials:-Working with Power MILL "PART V" Toolpath Leads and Links

If a tool is allowed to start machining directly on the end of a tool rack, it first ploughs though the remaining stock depth before suddenly changing direction to run along the tooltrack. This is likely to result in machining marks, vibration, and excess wear both on the tool and machinery. To avoid sudden loading on the tool, appropriate Lead moves (at cutting federate) on and off tool tracks can be applied.
Fresh air (Link) moves between individual tool tracks can add a significant amount of extra time to a machining operation. This can be greatly reduced by applying alternative, Link move options.

3 Answers

To provide for more efficient movement of the tool across the component the link moves that connect adjacent tool tracks can be defined in several different ways.

Short/Long Threshold - This defines the distance limit up to which the Short - Links apply. Any move from the end of a tool track to the start of the next, which exceeds this distance is defined as a Long - Link move.

For Short links the available options include Safe Z, Incremental, Skim, On Surface, Stepdown, Straight, and Circular Arc.

For Long links the available options include Safe Z, Incremental, and Skim.

Safe links apply only at the start and end of a toolpath the available options being Safe Z, Incremental, and Skim.

For applications where a machine control system will permit arc fitting of rapid moves the Arc Fit Rapid Moves box can be ticked along with a suitable Radius based on the active tool diameter TDU (Of particular benefit to High Speed Machining).

•Activate the toolpath 1_1 created earlier in the Leads section.
•Set the Leads In and Out to None, if not already set. Press Apply.

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Hello Friends, This tutorial continues for power mill Guidance.

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Z Heights

Skim and Plunge distance provide variable control of rapid move heights within a component. These operate in conjunction with Safe Z and Start Z to minimize slow and unnecessary movement of the tool in fresh air while machining the component form.

Skim distance – An incremental distance above the model at which rapid moves occur from the end of one tool track to the start of the next. The tool rapids across the model clearing the highest point along its route by the Skim value.

Plunge distance – An incremental distance above the local component surface where a downward rapid movement of a tool changes to plunge rate.

Answered with a tutorial: https://grabcad.com/tutorials/tutorials-working-with-power-mill-part-v-toolpath-leads-and-links--1