How to adjust for different tolerances

[Oppiz]

How do you handle parts that the imported solid model is made exactly the to print but the print has different plus and minus tolerance's through out. Do you edit the model? Use stock to leave? Use comp? or sent it back to person who made the model?

[RonC.]

I adjust geometry that I've pulled from model, (not the model itself)..

so when verifying and comparing to model I expect to see  different colors depending on the different  tolerance  ..

 

hth

Ron

[htm01]

i usually make my own geometry then

[Guest]

How do you handle parts that the imported solid model is made exactly the to print but the print has different plus and minus tolerance's through out. Do you edit the model? Use stock to leave? Use comp? or sent it back to person who made the model?

 

 

I kick it back to the engineer and tell him to do it right....that his laziness is killing all the tolerance

 

If the engineer is not available, like others, I split the numbers on my own geometry

[FROZEN]

How do you handle parts that the imported solid model is made exactly the to print but the print has different plus and minus tolerance's through out. Do you edit the model? Use stock to leave? Use comp? or sent it back to person who made the model?

Ha Ha Ha  Ha Ha Ha, send it back  !!! Welcome to the world of machining. Depending on time, I like to repair model. But if in a time restriction, use stock to leave. I always compare model to print before anything is done.

[Rstewart]

You guys are lucky enough to get Models?? 

 

I usually end up with some s#itty print from like 1957

[Oppiz]

What sucks is if you over look one of the dimensions and the guy at the machine starts adjusting tool comp then screw up a different feature.

[htm01]

most of our models come from outside, so it involves a lot of paperwork(print rev , new po) to change models

[jlw™]

I usually adjust in the toolpath with simple stuff liike contours but when I create surfaces I create them where they're needed any way.

[SlaveCam]

Stock to leave, for both sides and bottom, and leave the linking Z value as is.

[Colin Gilchrist]

Note that under the Stock Model Comparison, you can also adjust the tolerance range values and colors. so if nominal was -.002 stock, you could make that range "green", and adjust the other colors accordingly. That is only a pain if the features are not modeled with a consistent method.

[AMCNitro]

I do them right... (or at least thats what I tell myself)

[AMCNitro]

You guys are lucky enough to get Models?? 

 

I usually end up with some s#itty print from like 1957

Let me guess, aircraft spares?  We're on the same boat... It can be fun, but sometimes I want to dig the engineer out of his grave and beat the crap out of him  

[Colin Gilchrist]

Let me guess, aircraft spares?  We're on the same boat... It can be fun, but sometimes I want to dig the engineer out of his grave and beat the crap out of him  

 

Meh, the older ones aren't as bad as the first ones that started using Loft data points in the 70's and 80's. At least when everything was hand drawn, people took pride in their work, and their work was generally checked closely before it was released. It does get fun when an old print has multiple ADCN's attached, and you've got to go through and mark up a copy of the print to really figure things out. The worst is when there are multiple projected views, at non-right angles, and the don't bother to add any hidden lines or details "behind" the view. That gets fun...

[FROZEN]

Let me guess, aircraft spares?  We're on the same boat... It can be fun, but sometimes I want to dig the engineer out of his grave and beat the crap out of him  

What do you mean you can not machine it??? If I can draw it, you should be able to machine it!!!

[FROZEN]

How many times have you heard that one???

[jeff]

You guys are lucky enough to get Models?? 

 

I usually end up with some s#itty print from like 1957

I've actually had to use prints drawn in the '20's and last revision was like 1938.

Talk about turrible! 

Hard to believe that in 90 years, not one person said "hey, we should make a .dwg of this so it's easier to read".

 

My favorite is when the customer send you a .tif that is impossible to read due to all of the spots and stains on it.

[AMCNitro]

Meh, the older ones aren't as bad as the first ones that started using Loft data points in the 70's and 80's. At least when everything was hand drawn, people took pride in their work, and their work was generally checked closely before it was released. It does get fun when an old print has multiple ADCN's attached, and you've got to go through and mark up a copy of the print to really figure things out. The worst is when there are multiple projected views, at non-right angles, and the don't bother to add any hidden lines or details "behind" the view. That gets fun...

I have been lucky then!

I did run into one years ago that was an extrusion, and the print wasnt that good.  I had multiple machinist more experienced than me look at and no one could make sense of it.  I had to have the customer order a sample..

[Matthew Hajicek - Singularity]

My rule is to re-model it correctly with every face at the midpoint of tolerance, then send it back for approval.  If you have some faces + and some - there's no way you can do an STL Compare to check for errors.