4 axis verify and backplot

[herricam]

i am new to any sort of 4 axis work in MCX and having trouble with verify and backplot. if i use the rolldie function it will backplot the toolpath in the correct position but if i use pocket it shows the toolpath 90deg out to where it should be and if i verify it it will show 180deg out, why is this so.

[John Summers]

If you are using axis substitution, the proper parameters to make things line up are CW -90. The axis substitution is 'built in' to rolldie, so you don't have to supply those parameters.

[herricam]

where do i find this parameter?

[Dan@home]

It sounds like your T/C planes are off or wrong. Your Rolldie will correct itself.

[Justin Beebe at Folsom Tool]

herricam,

 

How did you set up your t/c planes for the pocket operation. You should leave WCS set to top and then create a new toolplane for your pocket operation and then chain in your pocket. For example if you are using a vertical mill and you want an A rotation of -90 degrees (meaning your pocket is on the front face of the part) set WCS to top and set t/c planes to front then chain your pocket geometry. If done correctly you should see the same result in backplot and verify which would show your tool coming in from the front plane in both cases.

 

Justin

[John Summers]

Sorry. The CW, -90 parameters apply to ROLL and UNROLL. After you unroll something, you use axis substitution.

To set up planes for 4-axis 'toolplane' work, start at TOP view, then rotate +Y only for each toolplane. Start over at TOP view for each plane, because rotation is incremental (or calculate the difference).

[herricam]

thanks for the help i will give it a go