creating Holes in PRO E

[Laserxenon]

I have two questions on creating holes in a part with PRO E:

1) When you are giving the distance from a feature on a part to give the coordinates for the axis for the hole (x,y, or whatever) why does PRO E round off decimals...ie if i need the hole .0625" inches from say an edge, why does it round it to .06"- cant it show or accept more decimals???

2)When you create a datum in the "holes" dialog box in order to give PRO E a reference to create a hole (ie.. you have a curved surface and you need a datum to give a primary surface), why does pro E make the datum, then delete it as soon as you create the hole? i could use that datum later..is there a way to fix this

thanks for any suggestions that people offer- this website is really a great reference!!- drew

 

[looslib]

You can change the decimal display. I think it is in setup. You can also modify the display with a config.pro setting. Just because the display is .06, the actual dimension is still the .0625 you entered.

I take it you are on 2001 or earlier. The Make Datum is always a reference datum for that feature only. In Wildfire, you can access the datum made as part of the feature. Unless you need the datum for a pattern reference, make it before you create the hole, especially if it is the placement datum and not a position datum.


"Wildfires are dangerous, hard to control, and economically catastrophic."

Ben Loosli
CAD/CAM System Analyst
Ingersoll-Rand

 

[TheTick]

It's been a couple years, but I remember a trick regarding decimal places and dimensions.

Case Study:
I was working on a Pro/E design project where our customer mandated that all dimensions in a model be the same as on the 2D print. This lead to a situation where it was necessary for a feature position be accurate to within 4 decimal places, but displayed in only 3, or else some of the other dimensions in the drawing (I don't remember the exact numbers, I'll use a figure of 0.6003 which would round to 0.600).

The problem was that when the decimal places on the dimension were reduced to 3, Pro/E would truncate and round the dimension, and not carry the full 4-place value. The value was actually changed to .6000!

The workaround for this was to assign the .6003 value to a named constant, and then tie the dimension to that constant. Then it could be displayed to 3 places while the modeler was holding accuracy to 4 places. The dimension displayed as "0.600" but was holding "0.6003".

Sorry, but I can't remember the exact Pro/E terminology. I hope this helps.

Good and evil: wrap them up and disguise it as people.

 

[Laserxenon]

thanks for the suggestions, i will try them out- drew

 

[ohio30]

looslib had the right idea. The value stored has all of the digits, but the display may not. Look at your config.pro and set one or more of the following options:
default_dec_places - set the number of decimals places to display in the model for non-angular dimensions.
default_dim_num_digits_changes-set the number of digits displayed for a dimension to the last entered value (yes/no)

Good luck!

 

[TheTick]

ohio30:

re: "The value stored has all of the digits, but the display may not.

It's been a couple years, but I had the opposite experience. When reducing the number of decimal places, the value was truncated and rounded,. i.e. "0.6003" to "0.600". When the decimal places was increased, the value was not stored, and I was left with "0.6000".

This was on Pro/E 20. I don't use Pro/E now. I'd like to see if someone would actually do a quick experiment to verify.

Good and evil: wrap them up and disguise it as people.