advanced 3d carving on 4th axis rotary

[reefy86]

no idea i am just following a tutorial that has similar details

[magicniner]

Unless your stock is very close to your part size the limited DOC and greater cost of ball end cutters means it makes no sense to use them as roughing tools, was the tutorial authored by an industry professional?

[reefy86]

This was the tutorial

https://www.youtube.com/watch?v=m8aWk6oTiF0&t=707s

[magicniner]

This was the tutorial

https://www.youtube.com/watch?v=m8aWk6oTiF0&t=707s

You could do the job quicker by roughing out to within 3mm of the finished surface with a more efficient cutter, then semi-finishing and finishing, provided roughing doesn't chip the material.

Did you notice that his spindle speed is 10000 rpm?

[reefy86]

for now i have no idea what spindle speed my machine will be able to do once finished but changing spindlespeed in deskproto doesnt affect the machining time, as for the cutter i have no idea what tool is best used accept the ballnose that only gets shown in tutorials.

[magicniner]

changing spindlespeed in deskproto doesnt affect the machining time.

If your CAM doesn't do it then something which must be part of your workflow must change feed speed with RPM - for any given material/machine/cutter combination there will be a small range of Feed per Tooth values which will yield optimal finish, tool life and job time.

Use a Feeds & Speeds calculator to get a ball-park figure and refine that for your machine through trial and error, a job which runs with a given RPM and feed speed can be problematic at half the RPM, you will be asking your cutter, machine structure and work to deal with double the depth of cut per tooth with significantly increased forces on everything.

as for the cutter i have no idea what tool is best used accept the ballnose that only gets shown in tutorials.

Even when you have 4th axis full rotary available it's common practice to rough out with an efficient cutter, a 3-axis tool path and indexed moves then semi-finish and finish with rotary because that's more efficient strategy for time and tooling costs.

HTH ;-)

[reefy86]

Thank you, the more i play around with it the more i bring the total time down but i won't know for sure how well the detail and how smooth it is until i test on the machine.