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CNC Mill - ICP 4030 Maintenance
This page is for detailed maintenance information that most users won't need to know.
MESA Configuration
The 7C81 MESA card uses the default 7c81_5abobx3d pin configuration. The configuration pinout is copied here for reference:
IO Connections for P1+Serial Pin# I/O Pri. func Sec. func Chan Pin func Pin Dir 0 0 IOPort PWM 0 PWM (Out) 0 1 IOPort None 0 2 IOPort StepGen 0 Step/Table1 (Out) 0 3 IOPort None 0 4 IOPort StepGen 0 Dir/Table2 (Out) 0 5 IOPort None 0 6 IOPort StepGen 1 Step/Table1 (Out) 0 7 IOPort None 0 8 IOPort StepGen 1 Dir/Table2 (Out) 0 9 IOPort StepGen 2 Step/Table1 (Out) 0 10 IOPort StepGen 2 Dir/Table2 (Out) 0 11 IOPort StepGen 3 Step/Table1 (Out) 0 12 IOPort StepGen 3 Dir/Table2 (Out) 0 13 IOPort None 0 14 IOPort QCount 0 Quad-A (In) 0 15 IOPort QCount 0 Quad-B (In) 0 16 IOPort QCount 0 Quad-IDX (In) 0 17 IOPort None 0 18 IOPort None IO Connections for P2+Serial Pin# I/O Pri. func Sec. func Chan Pin func Pin Dir 0 19 IOPort PWM 1 PWM (Out) 0 20 IOPort None 0 21 IOPort StepGen 4 Step/Table1 (Out) 0 22 IOPort None 0 23 IOPort StepGen 4 Dir/Table2 (Out) 0 24 IOPort None 0 25 IOPort StepGen 5 Step/Table1 (Out) 0 26 IOPort None 0 27 IOPort StepGen 5 Dir/Table2 (Out) 0 28 IOPort StepGen 6 Step/Table1 (Out) 0 29 IOPort StepGen 6 Dir/Table2 (Out) 0 30 IOPort StepGen 7 Step/Table1 (Out) 0 31 IOPort StepGen 7 Dir/Table2 (Out) 0 32 IOPort None 0 33 IOPort QCount 1 Quad-A (In) 0 34 IOPort QCount 1 Quad-B (In) 0 35 IOPort QCount 1 Quad-IDX (In) 0 36 IOPort None 0 37 IOPort None IO Connections for P7+Serial Pin# I/O Pri. func Sec. func Chan Pin func Pin Dir 0 38 IOPort PWM 2 PWM (Out) 0 39 IOPort None 0 40 IOPort StepGen 8 Step/Table1 (Out) 0 41 IOPort None 0 42 IOPort StepGen 8 Dir/Table2 (Out) 0 43 IOPort None 0 44 IOPort StepGen 9 Step/Table1 (Out) 0 45 IOPort None 0 46 IOPort StepGen 9 Dir/Table2 (Out) 0 47 IOPort StepGen 10 Step/Table1 (Out) 0 48 IOPort StepGen 10 Dir/Table2 (Out) 0 49 IOPort StepGen 11 Step/Table1 (Out) 0 50 IOPort StepGen 11 Dir/Table2 (Out) 0 51 IOPort None 0 52 IOPort QCount 2 Quad-A (In) 0 53 IOPort QCount 2 Quad-B (In) 0 54 IOPort QCount 2 Quad-IDX (In) 0 55 IOPort None 0 56 IOPort None
The MESA pins (as viewed from the top of the card) are assigned to LinuxCNC nets according to the following diagram:
Spindle VFD control
The VFD has both software and hardware controls. From a hardware perspective the spindle is controlled from the spindle-enable and spindle-ccw pins. The door switch also inhibits a signal to (TODO find VFD signal name).
The VFD signals are also used in combination with the door switch to inhibit motion. The HAL configuration corresponds to the following logic diagram:
Opening the door will always inhibit motion as this is connected to the reset pin of the flipflop. In order for motion to continue one of two things is required: the spindle to be disabled, or the spindle to be at speed. The spindle-at-speed signal ensures that LinuxCNC waits until the spindle has fully spun up before continuing after an interruption.
Touch probe
The touch probe signal probe-hw is connected to motion.probe-input through a oneshot pulse generator. This effectively pulse stretches the incoming signal to ensure a clean trigger.