Need help figuring out how to use a rotary table operation.

[D.sebens]

I’m wanting to make some tie down flags for a thing I’m making. They are 1.5” flat steel with 1/2” hole in it. I want to round the end of the flags with the rotary table. I get in my mind how it will work. I just don’t know how to offset it.

This is my thoughts on how to do it. Center quill up with rotary table center. Center hole in flag piece with rotary table center. Move end mill to side of part still in line with hole in one axis. Rotate table to cut.

Another question comes in also like if I want the hole centered in there should it be 3/4” back from the end?

In my head this word soup makes sense. If it’s not making sense to the rest of the world let me know and I’ll sketch it out real quick.

 

[WobblyHand]

I’m wanting to make some tie down flags for a thing I’m making. They are 1.5” flat steel with 1/2” hole in it. I want to round the end of the flags with the rotary table. I get in my mind how it will work. I just don’t know how to offset it.

This is my thoughts on how to do it. Center quill up with rotary table center. Center hole in flag piece with rotary table center. Move end mill to side of part still in line with hole in one axis. Rotate table to cut.

Another question comes in also like if I want the hole centered in there should it be 3/4” back from the end?

In my head this word soup makes sense. If it’s not making sense to the rest of the world let me know and I’ll sketch it out real quick.

Pictures or sketches will reduce any ambiguity. Personally, I'm not quite following you, but sometimes I miss obvious things.

 

[D.sebens]

Super crude but this is what I’m calling a flag as it will be welded on. I need to know hole placement to end and how to make the radius on a 1.5” wide piece. Should the hole end be 3/4” away or should the hole center?

 

[woodchucker]

Another question comes in also like if I want the hole centered in there should it be 3/4” back from the end?

This is the sentence I am having problems with. Can't understand what you are asking.

edit: in this case you want the hole center 3/4 from the end. And 3/4 from each side.
leave it in the rotary tables center, then move your table 3/4 + 1/2 the diameter of the cutter for your final cut (so more for your roughing cuts)

 

[D.sebens]

This is the sentence I am having problems with. Can't understand what you are asking.

What I’m trying to ask is if the drilled hole should be placed to be in the center of the rounded bit? I believe the center of the hole and the center of the radius should be the same? I dont see why they would have to be but I am thinking it would look better if it was? Sorry it’s morning and my coffee hasn’t kicked in so it’s loosely constructed thoughts in my head.

 

[WobblyHand]

If you want a full radius whose ends are tangent to the flag, then the hole center should be 3/4" from the sides and the end.

 

[woodchucker]

What I’m trying to ask is if the drilled hole should be placed to be in the center of the rounded bit? I believe the center of the hole and the center of the radius should be the same? I dont see why they would have to be but I am thinking it would look better if it was? Sorry it’s morning and my coffee hasn’t kicked in so it’s loosely constructed thoughts in my head.

yep, in this case that is correct.

 

[WobblyHand]

Yes the center of the hole needs to be at the center of the rotary table, for this operation.

 

[D.sebens]

So then for setting up the operation for the radius, do I start from 0,0 and move over to the side of the of the part and radius 180*?

 

[wnchstrtnfldvlle]

Joe Pie Rotary Table Video

Here is a goo video from Joe Pie on using the rotary table and doing what you are asking.