Kirk. Thank you. There is a lot here to absorb. The ways and means of programing are all new and a foreign language. But..it's coming. It looks like I need a few of those chips and sockets. The online supply houses are pretty good.
Does adding statments relative to encoders such as "loadrt encoder num_chan=2"etc. (taken from the etch file) bring along any response on the AXIS display screen? Or is there more to be done? Perhaps significant too is your references have shown me the search path on the LinuxCNC home page! Thanks Cal > On Sun, 2009-04-12 at 21:40 -0400, Cal Grandy wrote: >> Can anyone direct me to information about reading and display quad. >> encoder output? Several hours searching wiki etc. and I am less than >> enlightened. >> >> DataTorque SM15 encoders. >> >> TIA >> >> Cal in VT > > If you are using a PC parallel port for your encoder, this should get > you started: > http://www.linuxcnc.org/docview/html//man/man9/encoder.9.html > > or it might give you some insight as to how other input options may > work. > > I looked at the datasheet for your encoder: > http://www.cmccontrols.com/downloads/incremental_encoders/sm15.pdf > http://www.cmccontrols.com/incremental_encoder_sm15.asp > > Page two shows what the quadrature signals look like. Normally you would > deal with what is shown as A, B and Z in the Output Signals chart or > shown in the "Cable Color Code: Standard". You will need to assign > parallel port pins to the HAL encoder "pins" described in the man(ual) > document above. Then wire the encoder A, B and Z to the corresponding > parallel port pins. If you want to use the "Cable Color Code: > Differential Line Driver" option, you will need to to convert the A, A/, > B, B/, Z and Z/ to A, B and Z at the parallel port end with something > like: > http://focus.ti.com/lit/ds/slls111b/slls111b.pdf > > The HAL encoder module will decode and pass the count information to its > output "pins", which are usually connected to the axis and pid > modules(?). A sample configuration is here: > http://cvs.linuxcnc.org/lxr/source/configs/etch-servo/etch.hal > > -- > Kirk Wallace > http://www.wallacecompany.com/machine_shop/ > http://www.wallacecompany.com/E45/index.html > California, USA > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by: > High Quality Requirements in a Collaborative Environment. > Download a free trial of Rational Requirements Composer Now! > http://p.sf.net/sfu/www-ibm-com > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
