CadTools and xTurn (Vehicle Turning Software) Forum
CadTools General Category => CadTools General => Topic started by: lbh07 on June 05, 2012, 08:36:58 AM
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Hi,
I have found your vehicle turning simulation very helpful. I do have one question about reversing- is it possible? I am using a semi-trailer and need to do a 3-point turn but can't seem to find any option to reverse the truck and show my swept path. I understand there is a vehicle path direction to reverse, but that's not for this case.
Any help will be appreciated.
Thanking you in advance.
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Hi!
There’s’ no option for reversing a vehicle. Theoretically its’ the same path as you would go at forward direction, so if you can drive in one direction along a path you should also manage to reverse along the path.
Draw a path for reverse maneuvers and reverse it and generate envelope.
/Lars
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I'm pretty sure the backup envelope of the semi-trailer tracks differently than the forward one. There was a University study done, I think out of Canada, in the mid-90s that developed templates that the commercial program AutoTurn adopted in version 3.0. I could review a few enevelopes and email them to you Lars if you'd like? Hopefully I can find a copy of the study posted online, nchrp_rpt_505.pdf is a good reference but looks to be forward movements only.
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I haven't had a chance to prepare the backup envelopes, but after a suggestion by Lars in a related post, you might try PathFinder's free 30 day demo?
http://www.simtra.com/software-products/pathplanner-roads/features/ (http://www.simtra.com/software-products/pathplanner-roads/features/)
It shows to do backup envelopes like AutoTurn.
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Australian Standard AS 2890.2 has reversing templates for medium rigid vehicle, heavy rigid vehicle and articulated vehicle plus a description on how to use them. Very handy for designing loading bays.