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General Mach Discussion / Re: lpt problems
« on: September 16, 2008, 11:40:26 PM »
There is no connection between the port and the printing software when used for Mach3. A completely different set of drivers are installed to run the port, so it is not a throw back to it's printer days.
What you seem to be saying it that you have a detector on your spindle. You have applied this to pin 13 of the LPT1 socket. I assume you have set this up on Config/Ports and Pins/Input signals as the index input. I assume you have tested the iput - i.e. it gives a good signal when not connected, and when connected, the input shows up on the diagnostics.
Does it work ?? Do you see the rev counter count when you fire up your spindle.
Are you using a BOB board, if so which one. Does this reverse the inputs. The input pins on the LPT1 are normally held high by internal resistors (so this is their normal OFF position) your input should be active low, (to the LPT1 - not necessarily to the BOB) i.e. your detector should go to 0v to give an index signal.
I cannot see that holding the index signal high (it's normal OFF state) can give a signal OUT on other pins - these are to your stepper motors, I presume. Are these through a BOb as well.
What you seem to be saying it that you have a detector on your spindle. You have applied this to pin 13 of the LPT1 socket. I assume you have set this up on Config/Ports and Pins/Input signals as the index input. I assume you have tested the iput - i.e. it gives a good signal when not connected, and when connected, the input shows up on the diagnostics.
Does it work ?? Do you see the rev counter count when you fire up your spindle.
Are you using a BOB board, if so which one. Does this reverse the inputs. The input pins on the LPT1 are normally held high by internal resistors (so this is their normal OFF position) your input should be active low, (to the LPT1 - not necessarily to the BOB) i.e. your detector should go to 0v to give an index signal.
I cannot see that holding the index signal high (it's normal OFF state) can give a signal OUT on other pins - these are to your stepper motors, I presume. Are these through a BOb as well.