neutral-factor-needs-to-change-on-all-models

Forum|Forum|10 years ago
October 7, 2015
2 replies
9499 views

I need some help from someone, please.

I have a problem in that my head office requires me to use set bend tables, however the flat unfold produces the folds in all the wrong places for the manufacturing process my UK suppliers use.

I have been told by head office that in Creo, once the Neutral factor has been put in, it should never be changed. This in itself is a big problem to me as I cannot use any output for my UK supply chain.

When I attempt to change the neutral factor, every extrude in the sheet-metal fails to a Yellow traffic light. The only way to get back to green, appears to be, is to delete each extrude and replace in turn, always loosing vital design intent on the way.

Recently I have got the vital settings that I need for the UK supply to get a reasonable output with the fold-lines in the correct place, but this is not going to help me with the 6 years of models that all need these updates. In another package I have test driven recently it all changes and is correct as soon as the change is made. I cannot believe that PTC have made such a non mulit-configurable system as this.

Also the Rads all need to be reset too.

Another requirement I have is that all corners need a RAD added to them, has Creo got a default setting for this, or do I still have to open up the DXF and put them in manually in another 2d package?

Has anyone got any solutions to this problem I have.

At the moment I am very fustrated.

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General

D

DeanLong

1-Visitor

Francis,

I am curious what value the "Head Office" is requiring you to revise the neutral bend values to that is creating such an issue. I assume your extrusion lengths are changing based on Y and/or K factors in the bend table? I would assume it more likely the bends would fail upon revision, not the extrusions.

I see the issue you are faced with. It may be that all the models need to be addressed individually. One safe method to compare before and after Bend Table revision effects is to save your parts as STEP, revise your bend table values in the sheet metal parts, then assembly them (superimposed) and then modify/revise the issues. I suggest this method because, if you used a "Save As" to a new name (keeping them native Sheet Metal parts) I am somewhat certain if you have a global bend table driving your parts and you were to regen them in an assembly, all would be effected. By having an export/import, the "before" version is "dumb" and will not be effected by a bend table change.

A

Anonymous

Hi Dean our UK supplier is the odd one out, they use a planning type that uses something called "Step Backs" these differ from the head office bend table requirement. Head office want a uniform setting that they believe is right, however this appears not to generate the correct output for us in the UK.

I understand that Creo takes the data from the material, this has got me thinking that if I replace the material data, could this update the model too without creating the error that I am encountering at every extrusion? This is something I am not sure about.

Call me what you will, but I do not know how to set up a bend table in Creo, I am currently running with no set bend tables, but setting each one up with the model properties dialog boxes. I am wondering, if I knew how to create a bend table, would these over-ride the setting I currently have? If anyone can point me to a good bend table tutorial, then I would like to have a go at this.

D

DeanLong

1-Visitor

Francis,

Look in File, Prepare, Model Properties. Then click the "change" in the end of the Bend Allowance row. That will bring up the Preferences Dialog. From there you can set the values and save them. You can create one for the Head Office and one for the Odd Man Out. Now this does not get rid of the conflict between Boss and Customer. You may have to fight that one in a meeting room and let the least bloody prevail.

Let me know how you make out.

Cheers.

V

VladimirPalffy

14-Alexandrite

Hi Francis,

if you need to apply new preferences (for example new K-factor or Bend table) for your existing model you can do it manually or automatically (best practice is define a Trail file and reuse it - but you need to be experienced with this steps ).

I will try to prepare for you some information about it - How to define and create custom Bend table or/and How to reuse the Trail file.

I will stay in touch.

Best regards,

Vladimir

A

Anonymous

Vladimir, thank you, and I look forward to How to define and create custom Bend table or/and How to reuse the Trail file. I believe that this is key, as I do not currently use any bend tables. Your revolve and rip video will also be useful to me.

Francis