Success in steel

[Dave SParticipant @daves59043]

Almost no Endmills were harmed in the making of this test part:

Either my X or Y (or maybe both) are mirrored… I zeroed on the back right corner as per the image above and then was too slow on the stop button….

Still the machine has enough ‘push’ to snap a 6mm carbide end mill ( 🙁 )

I need to figure out which axis to change, but in the mean time I ran the part with where to zero worked out by air cutting… The ‘correct’ start point was back left rather than back right.

Starke TiAlN coated 6mm carbide endmill, 7000 rpm, 600mm/min 0.5mm optimal load on the F360 adaptive tool path, and 0.2mm stock to leave. The chips look like nice chips and are a golden colour.

Then cleaned up with a single contour pass and the 3d flat finishing pass.

https://youtube.com/shorts/vg4wrDNfDDE?feature=shared

Need to learn a bit more about how to finish off – the contour start point is clearly visible in the pics.

Best tool Ive ever made 🙂

Dave

 

[Julie AnnParticipant @julieann]

Looking good!

There should be options in the CAM program for curved or ramping entry and exit to/from a cut so that you don’t get the circular toolmarks.

Julie

[HuubParticipant @huub]

In my CAM system (FreeCAD) the arrows point in the + direction. In the CAM picture, the X-plus direction is towards the left. On most milling machines, the X-plus direction is towards the right. So it seems the machine is doing exactly what the CAM wants it to do.
To me, it seems the CAM X-axis is the problem. If you hold the mouse pointer at the opposite X-corner of the work piece, the coordinates show you what the cam X-plus direction setting actually is.

nice job

[JasonBModerator @jasonb]

All you need to do is “flip” the axis during setup to get them cutting the correct way. Arrow is the positive direction the cutter moves in not the work.

Also if you hold your phone in landscape rather than portrate the video will appear here and fit a screen better.

[DiogenesParticipant @diogenes]

..👍..thanks for the link to the other stuff, looks interesting..

[JasonBModerator @jasonb]

For the contour entry & exit you can change the angle from 90deg to 0 deg and it will just keep moving in the same direction and also increase the vertical radius to say 1mm from the default 0.4mm but that will mean the cutter is in contact with the side as it lifts fully clear, OK on a short edge like you have but may mark a taller one. So a small amount of angle say 5-10deg will just keep the tool off the finished surface.

 

This is also one to watch if you are cutting out a 2D shape with just the width of the cutter. If the material is quite think the tool will want to move away into solid metal at the end of the cut which can risk damage so reduce the amount or change the angle so it is in line not at right angles.

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