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Hole feature note using metric units for an inch thread in some cases

tbraxton
21-Topaz II

Hole feature note using metric units for an inch thread in some cases

When placing a 1"-20 TPI hole in a model set to metric units the hole note is using metric values. I want to display inch values in the note. Does anyone have idea how to set this to display the inch values? Creo 7.07. I have also included the custom hole table used to create the feature for reference.

 

tbraxton_0-1654778633337.png

This is a hole created using the same feature and hole table in another model that is also in metric units and it displays inches.

tbraxton_1-1654779607726.png

 

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Involute Development, LLC
Consulting Engineers
Specialists in Creo Parametric
6 REPLIES 6

You mention that the hole in the 2nd image was made in the same way as the hole in the 1st image, yet the note is different (looks like the standard Creo hole note)  So to clarify, you want the result shown in the 2nd image (1-20 instead of 25.400-20) ?

tbraxton
21-Topaz II
(To:pausob)

Yes, the objective is to have the note look like the second image with inch units for the thread (1"-20").

 

Creo does not have standard holes for EF series threads out of the box AFAIK so that is why the hole table is in use. I believe that the hole was created the same way in both models and both reference the EF series hole table.

========================================
Involute Development, LLC
Consulting Engineers
Specialists in Creo Parametric
TomU
23-Emerald IV
(To:tbraxton)

It looks like the hole notes may be referencing different tokens and/or parameters.  Double check the syntax in each note.

 

TomU_0-1654782247393.png

 

tbraxton
21-Topaz II
(To:TomU)

They are indeed different. I am not proficient with implementation of hole tables so is there a document that details how this would be controlled using the table?

 

tbraxton_0-1654782772213.png

 

tbraxton_1-1654782783072.png

 

 

========================================
Involute Development, LLC
Consulting Engineers
Specialists in Creo Parametric
TomU
23-Emerald IV
(To:tbraxton)

Documentation here:

https://support.ptc.com/help/creo/creo_pma/r8.0/usascii/#page/part_modeling/part_modeling/part_nine_sub/Thread_Notes.html#

 

Short answer:

  • If CALLOUT_FORMAT in the hol file is empty, Creo will use it's own built-in syntax.
  • If CALLOUT_FORMAT has some value, all holes created from that hol file will follow that syntax.
  • If a DEFAULT_CALLOUT_FORMAT_DATA table exists at the bottom of the hol file, that will be used instead of CALLOUT_FORMAT.

One thing I'm noticing from your notes is that the pitch Ø of the thread (or its minimum and maximum?) is being shown by re-purposing the parameters CLEAR_DR_MED and MED_DEC - which are meant to be the clearance drill names (string parameter) and size (number parameter) for "medium clearance" holes.  This explains why the 0.9675 remains unchanged in the metric model, but 0.9719 gets converted to 24.686

 

There is no need for this "hack" as one can add and call out a custom hole parameter(s) by appending column(s) in the custom .hol chart as explained in the help file:

pausob_0-1654926859990.png

 

Another thing is that the system will not "convert" the custom parameter values depending on units:

pausob_1-1654928513558.png

pausob_2-1654928650443.png

(it also ignores my 3 decimal places format specification - that's disappointing; there is definitely some strange things going on with hole notes behind the scenes, maybe they got fixed after Creo4...)

 

Anyway, I attach the custom hole table (used to make the hole shown in the screenshot above)

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