At 05:51 PM 3/11/2010, you wrote: >On Thu, 2010-03-11 at 05:43 -0500, Mark Wendt (Contractor) wrote: > > Kirk, > > > > Do you have a #0 tool position? With an incremental counter > > going from passing the #0 tool, just check the increment, and if it's > > equal to or larger than the median go one way, and if it's smaller > > than the median go the other. > > > > Mark > >Thanks Mark. I was going to write a component in C to make the decision >on direction and distance. I was thinking that there might be a C trick >that might be able to do it in a line or two. I guess (X + Y)/2 = >M, ?M>X, ?M<X, could be pretty short.
Even shorter... i++ if !i>=X then... Course, each time you passed 0, you'd have to zeroize your "i" variable, and that snippet assumes the "i" variable has been zeroized or you've started out at the #0 tool. >Seb has a component (modmath) already written so I need to look at both >solutions: >http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?ContributedComponents#modmath_Modmath_functions_only_mod_dir_so_far > > >(Short URL) http://alturl.com/b59n I saw the discussion about that after I replied. Too quick on the draw... ;-) >Here is my tool changer: >http://www.wallacecompany.com/machine_shop/Shizuoka/00029-1a.jpg >http://www.wallacecompany.com/machine_shop/Shizuoka/00030-1a.jpg > >(Thinking aloud) >The vertical Geneva drive in the first picture has been replaced with a >Bodine DC gearmotor driven by a PWM input amp. The gearmotor will drive >the carousel both ways. The sprocket in the second picture will be >modified to add a 4:1 gear reducer and an absolute encoder that reads 0 >to 1023 then wraps between tool 24 and 1. That could be tricky. even with a 4:1 gear reducer it's kind of an ugly map between 1024 pockets and 24 tools. >http://www.wallacecompany.com/machine_shop/EMC2/AEAT-6010/dcp_6888.jpg >http://www.wallacecompany.com/machine_shop/EMC2/AEAT-6010/ > >I'll need to figure out how to handle both tool number (1 - 24) and >pocket location (0 - 1023). Right now, I need to build all the parts, >then play with the software until it works. > >I think I'll calculate the direction then calculate the error between >the current location and the requested location, feed this into limit2 >or limit3 to get the velocity PWM signal to send to the amp. Hopefully >this will bring the carousel to the requested tool and constantly >correct any position errors. The limit will keep acceleration and max >speed in check. > >-- >Kirk Wallace >http://www.wallacecompany.com/machine_shop/ >http://www.wallacecompany.com/E45/index.html >California, USA Mark ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
