Kirk Thanks thats just the info i needed Dave
On 21 September 2014 15:28, Kirk Wallace <[email protected]> wrote: > On 09/21/2014 02:42 AM, David Armstrong wrote: > > Guys ,, > > > > could anyone send me a config for use with geko stepper drivers > > specifically how to deal with the charge pump > > (Oops, when you mentioned charge pump, I assumed you were talking about > the G540, which is known to have charge pump issues with LinuxCNC) > > The short answer on the charge pump is that the signal needs more > current than a normal logic input. > > There are a few options on how increase this current. Putting the > parallel port into EPP mode enables drivers in the parallel port and is > the most accepted (not best) method. The problem is that many parallel > port PCI cards still don't work this way. Another option is to add a > pull-up resistor to the signal or use a buffered break-out-board to > provide the extra current needed. > > My notes on the G540 charge pump are here: > http://wallacecompany.com/machine_shop/G540/ > > The oscilloscope trace pictures have 1 Volt per division on the vertical > axis (just under 3V max. on some to 5V max. on others). The file names > hint at what the configuration is, such as card name, port mode EPP or > SPP, pull-up, etc. > > There is also a jumper to force the G540 into enabled mode. > > -- > Kirk Wallace > http://www.wallacecompany.com/machine_shop/ > http://www.wallacecompany.com/E45/ > > > ------------------------------------------------------------------------------ > Slashdot TV. Video for Nerds. Stuff that Matters. > > http://pubads.g.doubleclick.net/gampad/clk?id=160591471&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers > ------------------------------------------------------------------------------ Slashdot TV. Video for Nerds. Stuff that Matters. http://pubads.g.doubleclick.net/gampad/clk?id=160591471&iu=/4140/ostg.clktrk _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
