Peter blodow wrote: >>Hello Peter, >> >> >my problem is claryfying now. > > That's always a good feeling :)
>>Since your step driver cards are low performance (5KHz max?) there is really >>little advantage to using hardware step generation (Mesa or Pico cards). In >>any case you would still need to hand edit the HAL file to set various >>stepgen >>parameters: steplen, stepspace, dirsetup, dirhold , etc >> >> >Please, please give me some real v a l u e s to set!!! > > You have to find out what values to use, based on the documentation for your motor drivers. The parameters are all explained in the documentation (you can use "man stepgen" in a terminal to see the manpage, look at one of the PDF files in the menu, or browse documentation on the linuxcnc.org website). >>Also, are you really sure your step motor drivers use Step & Dir inputs? >>If they were designed for quadrature (direct coil drive) you might have >>similar symptoms. >> >> >Yes, at least one of the cards can use both modi, and I was using the clock >and direction modus even before which already gave a little more power to >the motors. > > These motor drivers must be using direct phase drive signals, or there would be no way for the motor power to vary based on step length. (unless the design is really really bad) In modern drives, there is a separation of the logic input (steps or quadrature) from the motor output (power transistors). The input step signals just tell the driver to go to the next output state, and that state is maintained until another step signal (a request to change state) is received. If your drives need the step signals to be active for as long as the coils need to be powered, then you will need to manually edit config files - there's no getting around that. >One more word for explanation: You see, I'm not earning any money with my >hobby which seems to be different from some people here on this mail group. >Purchasing a, say, Mesa 5I20 from the German sales rep., will amount to, >considering currency ratio from $ to €, sales tax and shipping, about $315 >or, in terms of nourishment, 163 liters of beer (45 gallons, and not any, >but the best brand). Not that I drank that much, but it makes things more >evident... > > Money? What's that? :) - Steve ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
