Re: pitelli's and moment of inertia I think if instead of a servo you used a worm drive you could overcome the inertia. The gear cannot spin the worm, so as long as the motor is sufficiently high torque it should have no trouble with the gun bobbing around. Of course, with such a configuration you hit the problem that instead of knocking the gun around the forces try to strip the gears and rip the mounting hardware apart. Overcoming that in turn typically involves a finer pitch of worm, at which point you zenith traverse rate becomes very slow...
In short i think it is doable to add vertical stability but as always there is a trade off... On 2013-02-24 11:36 AM, "Frank Pittelli" <frank.pitte...@gmail.com> wrote: > Hooking up a commercial board to provide servo stabilization is not the > hard part (purchase board, plug servo into board, plug board into > receiver). The hard part is getting a barrel/marker assembly that weighs > more than a couple pounds to respond quickly and smoothly. In the video > shown, the barrel assembly is lightweight plastic and it's momentum can > easily be overcome by a standard servo. Even still, you can see a definite > lag time between the vehicle movement and the corresponding gun movement. > > Increase the weight being thrown around to a couple of pounds, with a > moment arm of up to 2 feet and the control mechanism must work much harder, > resulting in a harder feedback problem. Throw in actual dynamic forces > from driving around on an un-even surface with a heavy vehicle and things > get even harder. > > On 2/23/2013 10:12 PM, Derek Engelhaupt wrote: > >> You guys were just talking about this. Found some guy that did it: >> http://www.youtube.com/watch?**v=y-fPA88sCpw&feature=em-subs_**digest<http://www.youtube.com/watch?v=y-fPA88sCpw&feature=em-subs_digest> >> <http://www.youtube.com/watch?**v=y-fPA88sCpw&feature=em-subs_**digest<http://www.youtube.com/watch?v=y-fPA88sCpw&feature=em-subs_digest> >> > >> > > -- > -- > You are currently subscribed to the "R/C Tank Combat" group. > To post a message, send email to rctankcombat@googlegroups.com > To unsubscribe, send email to > rctankcombat+unsubscribe@**googlegroups.com<rctankcombat%2bunsubscr...@googlegroups.com> > Visit the group at > http://groups.google.com/**group/rctankcombat<http://groups.google.com/group/rctankcombat> > > --- You received this message because you are subscribed to the Google > Groups "R/C Tank Combat" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to > rctankcombat+unsubscribe@**googlegroups.com<rctankcombat%2bunsubscr...@googlegroups.com> > . > For more options, visit > https://groups.google.com/**groups/opt_out<https://groups.google.com/groups/opt_out> > . > > > -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
