I'm trying to grasp the physical wiring connections I need from the parallel port to the 5 1/4" floppy stepper controller. No problem on the power it will be from a PC power supply so I have both 5v and 12v.
On the parallel port side if I use the standard_pinout.hal the line linksp Xstep => parport.0.pin-03-out Does that refer to the register bit D3 (Data bit 3)on the parallel port? If that is the case do I connect as follows Signal pin 5 (D3) on the parallel port to pin 18 Step on the edge connector of the floppy controller and Ground return pin 20 (for D3) on the parallel port to pin 19 Ground (for Step) on the edge connector of the floppy controller. The Floppy controller needs: Drive Motor Enable (NMOTORON) When this signal line logic level goes true (low), the drive motor accelerates to its nominal speed of 300 rpm and stabilizes in less than 250 msec. When the logic level goes false (high), the motor decelerates to a stop. Direction, Step (NSTEP) A true (low) pulse with a time duration greater than 200 nsec on the Step line initiates rotation of the stepper motor. The rotation is Clockwise if the Direction line is in the true (low) state when a Step pulse is issued and anti-clockwise if the Direction line is in the false (high) state. The Direction line should be stable 0.1 µsec (minimum) before the trailing edge of the corresponding Step pulse and remain stable until 0.1 µsec after the trailing edge of the Step pulse. The rotation is initiated on the trailing edge of the Step pulse. So I need to pull down the signal to make the stepper step with EMC so I need to change the line linksp Xstep => parport.0.pin-03-out to linksp Xstep => parport.0.pin-03-out-invert 1 Thanks John ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
