Long carving bit,bad lesson

[ekimnamyr]

Thanks too all When the new bit arrives and some modifications are made I will HOPEFULLY be able to give a success story. If you take a peak at blogs you will see the pine wood derby car that I was trying to copy for my grand sons up coming race. Sorry about you breaking a bit also Michael Guess it is a learning curve as long as I learn from it. Again thanks to all the responses, Mike

[ekimnamyr]

Here I am again,, Can anyone shed some light on why when draft is added to this, The top Bezier gets the mountain effect that it does.

[mtylerfl]

Here I am again,, Can anyone shed some light on why when draft is added to this, The top Bezier gets the mountain effect that it does.

I don't know why it does that...might have something to do with the mirroring of the rail sweep vector. I have a suggestion...select your sweeps and the two rectangles for the wheel axles and Group, then Make Pattern. Try using the PTN itself instead of the sweeps and separate components. I'll bet the draft will 'behave itself' then (if you even need it). I just tried to do it for you, but am locked out with the message 'one or more patterns belong to someone else' which I think is actually an erroneous message, but it is what it is.

Most times, it's 'best practice' to use the Make Pattern feature anyway on sweeps and such. That way you avoid any 'weirdness' that can occur from directly using them. In other words, you will then be working with a PTN and it's generally a lot easier that way anyhow (for example, if you need to rotate something, you MUST create a PTN first).

[ekimnamyr]

will give it a shot Michael Thanks for the input. Mike;

[ekimnamyr]

Tried your suggestion Michael, But still has the same issue maybe a little worse, it gets the mountain effect with raising the bit optimizing now ??

[fwharris]

Your problem is that the top edge of the car is not smooth like it is on the bottom edge. I removed the draft settings and you can see that the top has bumps. When draft is applied in magnifies them.

[mtylerfl]

Yep, that looks a little goofy. Turn off the Draft...you don't need it. Also, turn off the Floor Feather (uncheck the box). Turn off the feather on the pinewood.You'll still see a "rim" of spikes on the upper side of the car.

Draw a rectangle, add a .25" feather (not flipped), make it a Carve Region and set the depth to 1.249". Make the rectangle "Additive Merge". Select Clip Carving: Exclusive for the pinewood pattern (leave the merge setting at normal). This should get rid of all the strange anomalies at the top edge of the pinewood pattern.

Adjust the rectangle size to make sense for carving. I included an MPC example for you to look at, with all the above settings. (It has the default tapered 1/16" bit...of course you will need to change that to the bit you will be actually using.)

[ekimnamyr]

Ah yes I can see it now,, Thanks Floyd

Your problem is that the top edge of the car is not smooth like it is on the bottom edge. I removed the draft settings and you can see that the top has bumps. When draft is applied in magnifies them.

[ekimnamyr]

That is what I am looking For Michael..... I'll make the changes and the new bit should be here and will give an update thanks for the instructions Michael, really appreciate it.

Yep, that looks a little goofy. Turn off the Draft...you don't need it. Also, turn off the Floor Feather (uncheck the box). Turn off the feather on the pinewood.You'll still see a "rim" of spikes on the upper side of the car.

Draw a rectangle, add a .25" feather (not flipped), make it a Carve Region and set the depth to 1.249". Make the rectangle "Additive Merge". Select Clip Carving: Exclusive for the pinewood pattern (leave the merge setting at normal). This should get rid of all the strange anomalies at the top edge of the pinewood pattern.

Adjust the rectangle size to make sense for carving. I included an MPC example for you to look at, with all the above settings. (It has the default tapered 1/16" bit...of course you will need to change that to the bit you will be actually using.)