How to extrude 1mm deep recess for screw head at the bottom of previous extruded face??.

jecomp

owen_sparks

As in much of CAD there are many ways to get to the same end result. 

In this instance one is to create a new sketch on the bottom face of your extrude.  (Sketches can be created on any planes of flat faces of a part.)

Another is to use the hole tool and create the counterbore with the throughhole.

Share the doc and add a hyperlink here if you need more help.

Cheere, Owen S

billy2

Don't forget about move face.

I'd rather that the original feature be edited to the correct dimension as opposed to 2 features defining one face. Try to keep each created face assigned to one feature. Then when you're editing your model, click a face and the feature tree highlights. If you have 2 features defining a face, you'll only see the last one in the list and it'll be hard understanding your design intent if a face has 2 features creating it. You'll have to dig deep to find the 1st feature.

If I worked on your model and wanted to make a change, the 1ST feature face would be difficult to figure out.

jecomp

Hi guys, thank you very much, you helped me sort it out. I obviously have to understand more of the way cad is structured and the interaction between features,faces and planes.I was able to deconstruct change the order of the sketches and extrudes and then repair all resulting RED sketches and extrudes. You Guys at Onshape are amazing at what you have created, Thanks again billy2 and Owen_Sparks.-------End Result Below-----                          

owen_sparks

As in much of CAD there are many ways to get to the same end result. 

In this instance one is to create a new sketch on the bottom face of your extrude.  (Sketches can be created on any planes of flat faces of a part.)

Another is to use the hole tool and create the counterbore with the throughhole.

Share the doc and add a hyperlink here if you need more help.

Cheere, Owen S

billy2

Don't forget about move face.

I'd rather that the original feature be edited to the correct dimension as opposed to 2 features defining one face. Try to keep each created face assigned to one feature. Then when you're editing your model, click a face and the feature tree highlights. If you have 2 features defining a face, you'll only see the last one in the list and it'll be hard understanding your design intent if a face has 2 features creating it. You'll have to dig deep to find the 1st feature.

If I worked on your model and wanted to make a change, the 1ST feature face would be difficult to figure out.

jecomp

Hi guys, thank you very much, you helped me sort it out. I obviously have to understand more of the way cad is structured and the interaction between features,faces and planes.I was able to deconstruct change the order of the sketches and extrudes and then repair all resulting RED sketches and extrudes. You Guys at Onshape are amazing at what you have created, Thanks again billy2 and Owen_Sparks.-------End Result Below-----                          

owen_sparks

No worries @jecomp

Don't leave us hanging, it looks great, but what is that thing?

Cheers, Owen S,

jecomp

It,s a battery carrier with a difference for a quad, the front and rear cutouts are to fit front and rear (Power) led lights with heat sinks.The reason for the led lights is to help us amateur pilots to identify which way the quad is going. Have lost 2 Quads to-date. Into the wide blue yonder.

owen_sparks

Ah-hah, nice   Thanks fo the insight.

Owen S.