Articles tagged with: 3D Toolpaths

29
June
2013

New Simple Ordering Option for Parallel

In the latest 2013 R4 development release we have added a new option to force simple ordering for parallel. By default the ordering will be done by shortest distance to reduce the machining time.

However, this can result in marks on the machined part for various reasons (for instance tool wear) where the passes get split in branches due to machining boundaries, check surfaces, etc. By enabling the new "Simple ordering" option the order will be continuous across the cutting direction.

Note that you will get extra linking motion when using this feature so the machining time will be correspondingly longer.

nl234 simple ordering edit parallel

Simple Ordering Option

Categories: HSM Tips and Tricks

29
June
2013

Minimum Cutting Radius

The developers have been releasing a number of new features in the R4 development versions this past week, including a new algorithm for the minimum cutting radius feature to avoid collapses in narrow areas.

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New minimum cutting radius algorithm

Categories: HSM Tips and Tricks

06
May
2013

Check in With Texas A&M Formula SAE Racing

Texas AM car2

It is the time of year that SAE teams are getting ready to compete. This month, we checked in with Make McDermott, faculty advisor for the SAE team at Texas A&M.

Mark McDermott has been the FSAE faculty advisor at Texas A&M for 15 years. During this time he has seen CAD/CAM technology use in education evolve. We asked Mark for his perspective.

Categories: HSM Tips and Tricks

06
May
2013

Understanding Shafter & Holder Mode

 

shaft and holder

Shaft & Holder Mode:

Specifies how the toolpath should handle a collision between the shaft and/or holder and the work-piece.

shaft and holdermode Trimmed - Sections of the toolpath that result in safe distances between the shaft and/or holder being violated are trimmed away.

Pull Away - The toolpath pulls away for the work-piece to maintain a safe distance between the shaft and/or holder.

Detect Tool Length - The tool will automatically be extended further out of the holder to maintain the specified safe distance between the shaft and/or holder and the work-piece. A message that indicates how far the tool is extended out of the holder will be logged.

Fail on collision - The toolpath calculation is aborted and error message logged when the safe distance is violated.


Categories: HSM Tips and Tricks

04
May
2013

Check in With Tyler at San Diego State University

I just wanted to share a few pictures of my latest project here in the ME shop. This is an aluminum fuselage bladder mold for the Design Build Fly team (DBF) here on campus. They will be laying up pre-preg carbon fiber sheets and clamping the two halves together under heat then inflating the bladder to maintain the features of the mold. They brought me $860 of aluminum and $350 worth of tooling.

The bottom mold was a lot of fun for the first 3". I was able to take a 2.75" depth cut with a 3/4" roughing ball end mill at 22.5 IPM and 0.1" step overs. Past 3" it gave me trouble since I had to reach down so far, ~3.8". Even a 1" ball end mill with a 4" length of cut presented issues with rigidity, but once the roughing was completed it went great.
For the finishing operation I used the Scallop 3D milling strategy with 0.007" stepovers, took about 23 hours to finish. It needs almost no finishing, right out of the mill.

The top half of the mold was much simpler, just because we only had to go to a max depth of ~2.5". I also used Scallop with 0.007" stepovers for the finishing on the top, took about 18 hours.
This also came out very nice, minimal finishing outside of the mill.

Categories: HSM Tips and Tricks

29
July
2012

Toolpath Trimming

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Toolpath before and after trimming.

HSMWorks provides many different ways to confine the areas being machined (e.g. check surfaces, rest machining, slope, boundaries, and more).

HSMWorks also provides an alternative approach called "Toolpath Trimming" which allows you to remove unwanted cutting passes from the generated toolpath by directly selecting them.

Categories: HSM Tips and Tricks

28
July
2012

Scallop "Boundary Overlap"

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Left: Boundary overlap = 1mm - Right: No boundary overlap.

When using slope confinement and/or rest maching on Scallop finishing, you can use the "Machine areas using boundaries" to start offsetting the toolpath from the boundaries created by the slope and/or rest material detection.

Categories: HSM Tips and Tricks

27
July
2012

Toolpath Fillets

HSMWorks provides a toolpath filleting function, which is useful for avoiding sharp corners in 3D finishing toolpaths. With fillets applied, sharp turns in the toolpath can be reduced so that the CNC control can maintain a higher feed rate and/or prevent overshooting.

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The Fillets group and Fillet Radius parameter is located on the
Passes tab between Stock to Leave and Smoothing.

Categories: HSM Tips and Tricks

27
July
2012

Pocket Clearing Core Roughing (Boundary "None")

You can now choose a machining boundary of "None" for Pocket Clearing.

Choosing "None" as the machining boundary puts the Pocket Clearing strategy in Core Roughing mode, where it starts from outside of the Job Stock instead of ramping down.

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Setting Machining Boundary to "None".

The following screen shots shows a comparison of the two modes, as well as an Adaptive Clearing toolpath with comparable settings.

Categories: HSM Tips and Tricks

14
July
2012

Using Slope Angle Confinement

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Contour Finishing
Slope Angle: From 45 to 90deg

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Parallel Finishing
Slope Angle: From 0 to 45deg

Categories: HSM Tips and Tricks

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