Newbie Problem.....

[MattUK]

Hi all..


Ok I have been using the Helical Sweep function to creat threatds for screws and some forthe unit they screw into...I have managed to creat 4 sets of threads on one part which turned out really good but I am trying to do the last set of threads and for some reason when I sketch the CUT OUT it will not allow me to finish the thread sweep it says :


"Unattached CUT was deteced"


and also


"could not intersect part with feature"


The thing is, as I have mentioned..I have already completed 4 sets of threads on the same part and I am using the same method to creat the last set??? but cannot do it.....it is prob someting stupid !


Anyone?


Many thanks for your TIME


Matthew.



Edited by: MattUK

 

[jayuy]

MattUK,


Sometimes i encounter the some problem and i could'nt find the cause why it says unattaced cut was detected or could not intersect part with feature, when this happens i usually create the cut using surface and cut it using quilt and it works fine.hope it helps


jayuy

 

[MattUK]

erm, well I have just started learning with the helical sweep function....I am not sure how to creat threads using quilt ?....but the helical sweep problem is doing my head IN !!


Thanks for the reply


Matt.

 

[paulcunningham3]

Might sound like a silly question but have you ensure the arrow is in the right direction for cut sometimes you need to flip it, i've never had the message unattached cut! I presume this message would occur if your section did'nt marry up with the trajectory, if you do get to root of problem would be interested to know!


Sorry couldn't be anymore help


Paul Cunningham

 

[MattUK]

Paul thanks for the reply....I tried that no joy, best I have had is a start of a thread...well not even that, it looks like it starts but stops within 90 degrees from the starting point?


Matt.

 

[burnsp]

I've seen that message when my cutting section is taller (longer) than or equal to my thread pitch. Make sure the cutting section does not overlap due to a small pitch. Adjust either as necessary. BTW, what version are you on?

 

[MattUK]

Cheers Burnsp I will give it a try....I am using Wildfire 2


Many thanks for your time !!


Matt.

 

[dept664]

Matthew,


No tips for you except this one: Is there a functional reason to model the threads? If not, I would advise that you do them as cylinders and use the cosmetic thread features. Will save much aggravation in mating features, regen times, etc.


Yeah, helical threads look nice, but if they aren't necessary, don't do them.


Gary B

 

[burnsp]

Gary's right regarding standard threadsbut in my case, we are creating custom threads for medical implants so I'm always using this feature.

 

[kschauer]

I had this same problem before. What I believe was happening was proe didn't like the cut going of into air.

My fix was to add more to the end of the rod, thread the rod but do not go to the end, then cut of the extra...

Yes, it's 1-2 more features but it was a work around.

 

[burnsp]

I generally place my sketched section below the protrusion so it starts in "mid-air', continues up and cuts into the protrusion and gradually pulls out into"mid-air" -all controlled by the sweep profile. This has not caused me any problems, at least with my models in 2001, WF1 or WF2. All my problemsappear to stem from the realtionship between the section size and the thread pitch - see my first entry in this thread.