reverse engineering. . .this unknown

[Mocca]

Good morning.
I would need advice from you experts who already perform this type of activity; I'll explain.
a customer of mine has a series of plastic details and its goal would be to get the same models but in 3d subsequently editable with a classic “cad-3d” for construction needs.
considering that of this topic “rev-eng” I know little or nothing, I ask: who of you can help me understand how I should/may equip myself (hardware and software) to be able to meet its needs considering the countless amount of “scanner” and “manipulators” present on the market including their evolution in recent years? I would therefore like to consider whether it was the case of self-equipment or to support technical offices which already carry out this type of activity.
thanks in advance for the answers.
Mouth

 

[Il marangon]

You should understand what details are and how complex, what precision is needed in redesigning.

if they are only aesthetic or mechanical parts with tolerances etc.

 

[Mocca]

the details are of an aesthetic type of the "automotive" field (parafanghi, spoiler, masks, etc.) and of course have the relatively complex inner part. Since the aesthetics must be partially modified, the inner part may remain unchanged and of course the tolerances of coupling with the existing details are in the order of the tenths of millimeters.
Mouth

 

[Il marangon]

if we talk about parts of automotive the only software that enter this market is catià nx and pro-e, that I know

as a digitalization system I would go to the laser, now there are different types with different characteristics and precision. Of course the higher the precision and the higher the cost. I don't know if you agree to buy one or rely on specialized service, it depends on the number of pieces you need to scan.

I would avoid considering the systems like baces3d; you have too complex pieces to redesign. . .

 

[safe60]

I do not know if it is worth equipping itself independently. You could go to a service that can give you the stl file of the model and then you could build the mathematicians above hand over the final model to the customer or you can directly request the mathematicians. I know a consultant who does this (it's not me) and if you're interested, I can send you the link to his site. uses a gom digitizer and and I know that sometimes scans do it directly to the customer if there are any problems of item confidentiality or size.

 

[Mocca]

Okay.
Meanwhile thank you for the answers. then should I purchase a laser scanner that I imagine will be used to generate a "points cloud" and then should I switch to a specific software that "transforms" this cloud of points into surfaces (nurbs or bezier) or in between is there anything else?

 

[Il marangon]

a laser does not give you a cloud of points but a file mash, from there to redesign everything

to have an idea of what to do with these I recommend this discussion
http://www.cad3d.it/forum1/showthread.php?t=13077

 

[Mocca]

I do not know if it is worth equipping itself independently. You could go to a service that can give you the stl file of the model and then you could build the mathematicians above hand over the final model to the customer or you can directly request the mathematicians. I know a consultant who does this (it's not me) and if you're interested, I can send you the link to his site. uses a gom digitizer and and I know that sometimes scans do it directly to the customer if there are any problems of item confidentiality or size.

I miss a ride:
the digitizer creates the cloud of points; a specific software transforms the cloud of points into triangulations (stl); another specific software, what you recommend to me to do, puts me in conditions to create "class" surfaces by leaning on me to the sl? This means I should have a hardware and 2 software or I'm wrong.
In fact, it is estimated that the investment is not a few thousand euros.
I'll try to hear him, too.
Thank you.

 

[safe60]

Usually the software supplied to the digitizer is able to create the stl lfile starting from the cloud of points acquired operation already, if not trivial taking into account all the problems typical of these activities.
in addition to the stl file, it should be able to provide sections of the model but these are of little practical use for the purpose of a subsequent modeling because on it's "sick" (the softare draws the section "slicing" the stl model and the section curve is actually a broken with many points) that in the best of the cases will make a hugely heavy success model.

to build "theft" maths, it serves a special sw. I know geomagic which is the reference in this kind of activity

then you would need: the typizer alone if then the mathematicians build it you importing the stl file into your favorite cad and "calculating it" by hand.

or. .

the digitizer and a reverse engineering sw if you want to automate as much as possible.

Even if everything depends on what you take.

 

[IPdesign]

I miss a ride:
the digitizer creates the cloud of points; a specific software transforms the cloud of points into triangulations (stl); another specific software, what you recommend to me to do, puts me in conditions to create "class" surfaces by leaning on me to the sl? This means I should have a hardware and 2 software or I'm wrong.
In fact, it is estimated that the investment is not a few thousand euros.
I'll try to hear him, too.
Thank you.

hi mocca, just irei was evaluating a scan arm with laser gun and its software.
In my opinion very good for what you have to do.
Even if the costs have been reduced a lot, I would say that the figures are still high, much more for those who want to do a one-off job.

requests were about 70k€, hw and sw.
What to say, you have to do with scans.

 

[micknat]

Hello, Moucca.
if you want a "interested" but objective advice... ;-) contact a service. in our study we have an optical digitalization machine of the gom (probably the best you can find) that costs hundreds of thousands of euros!!! and training times to get good stl files are quite important (mesis... if not years). we also have a rotary laser (just below 100 thousand), very fast in acquisition, but suitable for large surfaces (storage lamps, facades of buildings...).
to do what you need (model cad of particular aesthetics automotive industry to edit) geomagic would not use it... if not only in the first phase of "system" of the slate (although the pieces are beautiful to see them, do not even imagine how many imperfections emerge from a scan done well)... usually I go on catheia that is really spectacular and fast in creating beautiful surfaces and faithful to a scan. . .
even for scanning, you have to be careful. Usually the plastic piece deforms in the assembly (although little) we usually use different devices. doing a job done well is not simple. . .
I hope I haven't confused your ideas....
Greeting

 

[Mocca]

Meanwhile thank you for the answers.
I have come to the conclusion that also the field of rev-eng is a jungle between hd and sw also, making treasure of what is said by ipdesign before damaging the investment you will have to do scans to everything spy besides obviously the initial amount to support
for what I will have to do on behalf of my client the most convenient way, for now, is to contact a service that already does this type of activity.
Thanks anyway to everyone for clarifying my ideas a bit.
Mouth