Lathe tool setup inadequate for round insert?

[CAD_CAM_MAN]

I am trying to setup a multidirectional turn tool with a round insert represented by the model in figure 1 I need the cutter compensation in the upper left corner as viewed in figure 1...

 

Notice on the holder tab in figure 2 there seems to be a missing dimension that controls either the width of the portion that holds the insert or the dimension that constrains the offset of the tool. I would assume cutting width would be the former but the dimension lines show the latter...

Further on the Setup tab I cannot seem to get the correct virtual tool nose position (compensation). Tip and Tip Tangent go to the upper right corner. Tip center and Insert Center go to the center of the insert.  See figure 3...

What am I missing? Please advise!

[Anonymous]

change to right hand

[CAD_CAM_MAN]

This is an offset profiling tool not a groove tool...

If I try to profile with a groove bar I get the following...

I had tried right hand tool but it puts the offset on the wrong side. The compensation is correct but the offset is not.

I realize I can get the correct tool path with this condition however my post will not set the tool origin correctly (G50 method). Of course It is easy enough to fix 2 numbers in the NC code manually but I do not want to remember to have to do that every time.

[Marco.Takx]

Hi @CAD_CAM_MAN,

What you want is actually not possible at the moment.

If you don't have to allow radial grooving selected in your operation you can set the tool like this.

But the best is to set the Holder at No Holder.

It's not the solution you like to see, but the operation can run.

You can publish this as an Idea on the Ideastation.

If my post answers your question Please use  .Accept as Solution & Kudos This helps everyone find answers more quickly!

[CAD_CAM_MAN]

Idea submitted...

Please give a thumbs up...

https://forums.autodesk.com/t5/hsm-ideas/need-more-options-with-lathe-tool-setup/idi-p/7714672

[Anonymous]

There's another problem with round inserts that you will soon find.

If you profile a part that has a curved face (round/oval) with a round insert you will find that it will never reach the center of the face the way it should. The toolpath will end when the tip of the insert reach the center of rotation while this should be the center of the insert. The result is a point with the same radius of the inserts in the machined part. This is very obvious if you try making a ball face with a large insert.

I understand that this is certainly a challenge to have hsm figure out the exact point of contact with a round inserts in order to determine the correct toolpath but noted that the facing operation provide the correct toolpath with the tip of the inserts extending beyond the center of rotation according to the radius of the inserts.

[CAD_CAM_MAN]

This is a work around not a solution.

[jlarkin]

I see this is quite old but has this been resolved in Fusion 360 2025, I have had to do a work around by setting zero and offset it by the radius to get it to work

[gafoorbolate]

More often than not, your Z will not change more than .001”. X will for sure change. You can change the offset twice the difference in radius. (.031-.008)*2 = .046” away from the material. However since you are changing inserts and not just insert corners, there is higher likelyhood of manufacturing variation between the two inserts so it’s much better practice to retouch off the tool. In my shop, I tell my guys that changing corners has much high repeatability (but even this is not guaranteed) than swapping out to a different insert even with the same geometry. The quick an dirty method will work for any non critical dimensions. However, good practice for good machinists is to always touch off because maybe you didn’t forget to blow out the chip but the chip itself was a stubborn mfer. https://xender.vip/    

[jlarkin]

Thank you for responding, but my issue is with the option for comp. no comp for side of insert