Dimension round slot from ends, not centers.

Edit: I realized I was asking the wrong question and the drawing snippet I attached doesn't actually show the dimension I'm looking for. Read on for updated info.

I need to find the distance from an end of the round slot to the origin. I've got to imagine I'm missing something pretty obvious...

I've got a part with 18 round slot "pockets" (.270" wide, .150" dp, various lengths) circling the OD of a cylinder. Their positions in Z are dimensioned from one end of the slots to the origin. Can I create planes tangent to the end of each slot and perpendicular to Z?

While I'm here, how do I dimension the depth of the slot from the highest point on the OD?

Don't cringe, been using 2011 Mr1 and now 2012 Mr1 lightly for about two years, still very much a newb. I'm comfortable in Summary mode, starting to claw my way through Command mode. Had a couple days on-site training from Colin and besides that, been figuring it out as I go(I've asked the bosses for more training). That being said, I'm stuck on these slot locations. Any help is much appreciated.

Thanks

Attached Files

Parents

Colin Simithraaratchy over 10 years ago

Ugh, that's a really poor drawing. The engineer has defined the size of the slot, but not necessarily the location of it. Blech.

Looks like WayneBending has already suggested a good course of action, but you've misunderstood him:

He says to create Auto Circles, activate the correct workplane, and Construct a Round Slot. Your comment about looking for Auto Slots indicates that you're not doing this.

Here's what I would do:

- shoot the bottom plane of a slot
- in the Settings Toolbar, choose that plane in the Projection Plane dropdown. Now all future 2d features will be flat to that plane.
- Force PCDMIS into circle mode.
- shoot a circle at each end of the slot. Due to the PP dropdown, the circle will be flat to the prev selected plane.
- construct a round slot from the pair of circles. same as above applies.
- you can capture the length of the slot with either a Location Dimension in the L-axis, or a Distance Dimension between the two circles with the Add Radius option.
- you should also dimension the Location of one of the circles for the slot -- preferable the one on the common end, so that you know both the slot's length and location.

Kingsld1's advice re: findhole / sample hits is not applicable here. You can read the Help menu to find out why.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel

Reply

Colin Simithraaratchy over 10 years ago

Ugh, that's a really poor drawing. The engineer has defined the size of the slot, but not necessarily the location of it. Blech.

Looks like WayneBending has already suggested a good course of action, but you've misunderstood him:

He says to create Auto Circles, activate the correct workplane, and Construct a Round Slot. Your comment about looking for Auto Slots indicates that you're not doing this.

Here's what I would do:

- shoot the bottom plane of a slot
- in the Settings Toolbar, choose that plane in the Projection Plane dropdown. Now all future 2d features will be flat to that plane.
- Force PCDMIS into circle mode.
- shoot a circle at each end of the slot. Due to the PP dropdown, the circle will be flat to the prev selected plane.
- construct a round slot from the pair of circles. same as above applies.
- you can capture the length of the slot with either a Location Dimension in the L-axis, or a Distance Dimension between the two circles with the Add Radius option.
- you should also dimension the Location of one of the circles for the slot -- preferable the one on the common end, so that you know both the slot's length and location.

Kingsld1's advice re: findhole / sample hits is not applicable here. You can read the Help menu to find out why.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel

Children

No Data