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Rail Sweep problems
Read 747 times
* March 07, 2018, 07:00:04 AM
I've had this problem for years, never got to the bottom of it:

How do I control which point, and orientation, determines the way a polyline profile follows a polyline path? It seems to be a matter of luck when it goes the way I want. I'm generally drawing the profile at the end of the line, with a node (or default ref point) at the end of the path line. Which rarely works....

I'm using 17.2 pro generally, though do also have 2017 pro available.

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Currently installed v17.2 Pro (with VBA) and 2017 Pro Platinum on Windows 10.   Started with TC v2 !


* March 07, 2018, 12:24:10 PM
#1
Think maybe it was just Sweep, rather than Rail Sweep, that I needed. Not that I'm 100% clear on the difference.... ?

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Currently installed v17.2 Pro (with VBA) and 2017 Pro Platinum on Windows 10.   Started with TC v2 !


* March 07, 2018, 02:16:25 PM
#2
Sweep.  One needs to set up the profile correctly with regards orientation, and placing the profile at the correct position at the start of the part.  may take longer to set up, but it is more predictable than rail sweep.

Rail Sweep. TC automatically rotates and moves the profile to the start of the path and carries out the sweep, so the profile and path can be on the same plane. Manually Orientating the profile is not required, but results are not always easily predictable (it generally orientates Z axes to follow the path).

I tend to use Sweep the most, and orientate the profile how I want before carrying out the sweep.  I just use rail sweep for a circle along a spline path, as the orientation of a circle just needs to be perpendicular to the start point, and rail sweep will do that just fine. 

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* March 07, 2018, 03:01:20 PM
#3
Thanks Andy, that's pretty much what I've now worked out. Not sure why I've been trying to do it with Rail Sweep for so long  ::)

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Currently installed v17.2 Pro (with VBA) and 2017 Pro Platinum on Windows 10.   Started with TC v2 !


March 14, 2018, 04:22:56 AM
#4
Thanks Andy, that's pretty much what I've now worked out. Not sure why I've been trying to do it with Rail Sweep for so long  ::)

I know that I've preferred Rail Sweep because I usually get a usable result the first try (but sometimes not).   ;)

Granted, I do have to adjust the object's Reference point from time to time (especially if there is enough of a curve to cause the ACIS Solid of overlap on itself).


Jeff

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TC Pro Platinum 2018, 2017, 2016 & 2015 (all with LightWorks & RedSDK) & V21
System: i7-5820K @ 3.30GHz, ASRock X99 Extreme4, 16GB DDR4-2133 RAM, Gigabyte GTX 970, Samsung NVMe SSD 950 (256GB), Windows 7 Pro (64-bit) SP1


* March 14, 2018, 07:59:20 PM
#5
Jeff it is hard to believe you have never had an upside down profile. You must have a trick you are unaware of.

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Nikki
TC20 platinum
TC 2015 platinum
TC 2017 with lightworks


* March 14, 2018, 09:43:16 PM
#6
Jeff it is hard to believe you have never had an upside down profile. You must have a trick you are unaware of.

For me, it depends on which Edition I'm using. Platinum goes one way and Deluxe goes the other way. I saw this in 2010 (Version17) and just now in the 2017 editions (Version 24).

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John R.

V17—V21, 2015—2018
Designer, Deluxe, Expert, Basic, Platinum
RedSDK enabled, except in 2018
Windows 10, 64-bit