for those interested I am sharing forward and inverse 2d 2dof kinematics. next up is 2d/3d 3dof but only when i find a decent tutorial/implementation that will translate to [expr] easy.... which also might not be so easy
cheers m On Wed, Jan 25, 2017 at 11:25 AM, me.grimm <[email protected]> wrote: > hey matt yeah that does work out correctly. thank for the help... > > i figured i was using the "^" operator wrong here.... > > cheers > m > > On Wed, Jan 25, 2017 at 11:10 AM, Matt Barber <[email protected]> wrote: > >> In expr, ^ is bitwise-exclusive-or, but you want exponentiation. Just >> replace $f1^2 with $f1*$f1. >> >> On Wed, Jan 25, 2017 at 11:03 AM, me.grimm <[email protected]> wrote: >> >>> Hello, >>> >>> I am trying to calculate inverse kinematics in 2D space with 2 DOF >>> according to this tutorial(1) and formulas within using [expr]. For some >>> reason my calculations for "c2" using [expr] deliver quite a different >>> result than the excel sheet calculation that the tutorial provides. >>> >>> What am I doing wrong here? It may be I don't quite understand how "^" >>> is used? >>> >>> Using: >>> Linkage 1 length of 5 >>> Linkage 2 length of 4 >>> >>> and plotting my the end of joint 2 at (3.56, 6.43) I should get c2 to >>> equal 0.3254625 but get 0.25 with [expr]. Because of this further >>> calculations to get joint angles are also off, obviously. >>> >>> attached is patch. >>> >>> but maybe someone has already done this type of work which might save me >>> some trouble... >>> >>> cheers >>> m >>> >>> >>> (1) http://www.societyofrobots.com/robot_arm_tutorial.shtml# >>> inverse_kinematics >>> >>> -- >>> ____________________ >>> m.e.grimm, m.f.a, ed.m. >>> syracuse u., tc3 >>> megrimm.net >>> ____________________ >>> >>> _______________________________________________ >>> [email protected] mailing list >>> UNSUBSCRIBE and account-management -> https://lists.puredata.info/li >>> stinfo/pd-list >>> >>> >> > > > -- > ____________________ > m.e.grimm, m.f.a, ed.m. > syracuse u., tc3 > megrimm.net > ____________________ > -- ____________________ m.e.grimm, m.f.a, ed.m. syracuse u., tc3 megrimm.net ____________________
inv-fwd-kin-test.pd
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kin.fwd.2d.2dof-help.pd
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kin.fwd.2d.2dof.pd
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kin.inv.2d.2dof-help.pd
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kin.inv.2d.2dof.pd
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