ebox.comp for gearbox 2speed

andypugh wrote:

I see the problem, the component does a check for a change in the spindle speed:

// Only do anything if the spindle speed has changed
if ( fabs(spindle_speed - last_speed) < 50) return;

But it never updates the "last_speed" so this comparison always returns "false" so the code continues and the timer is set back to 2000. 


Try this version.

[code]component ebox "electronic gearbox component";
license "GPL";
pin in bit spindle-on-in;
pin out bit spindle-on-out;
pin in float spindle-speed;
pin out bit relay1;
pin out bit relay2;
pin out bit relay3;
function _;
include "rtapi_math.h";

;;

FUNCTION(_){
static int timer;
static double last_speed = -100;
if (timer > 0){
timer -= 1;
spindle_on_out = 0;
} else {
spindle_on_out = spindle_on_in;
}

// Only do anything if the spindle speed has changed
if ( fabs(spindle_speed - last_speed) < 50) return;
last_speed = spindle_speed;
if (spindle_speed >= 1500 ){
relay1 = 0;
relay2 = 0;
relay3 = 0;
spindle_on_out = 0;
timer = 2000;
} else {
relay1 = 1;
relay2 = 0;
relay3 = 0;
spindle_on_out = 0;
timer = 2000;
}
}

[/code]

Thanks, I'm testing. and will inform you

No need to calculate speed. I'm thinking of using input. Select gear-a Connect from relay, select pid.s

Here is my video of gear shifting mechanics.

youtube.com/shorts/S1rABB1xseo?si=2_OF_09-_dENMKVb

andypugh wrote:

Try this version.

component ebox "electronic gearbox component";
license "GPL";
pin in bit spindle-on-in;
pin out bit spindle-on-out;
pin in float spindle-speed;
pin out bit relay1;
pin out bit relay2;
pin out bit relay3;
function _;
include "rtapi_math.h";

;;

FUNCTION(_){
static int timer;
static double last_speed = -100;
if (timer > 0){
timer -= 1;
spindle_on_out = 0;
} else {
spindle_on_out = spindle_on_in;
}

// Only do anything if the spindle speed has changed
if ( fabs(spindle_speed - last_speed) < 50) return;
last_speed = spindle_speed;
if (spindle_speed >= 1500 ){
relay1 = 0;
relay2 = 0;
relay3 = 0;
spindle_on_out = 0;
timer = 2000;
} else {
relay1 = 1;
relay2 = 0;
relay3 = 0;
spindle_on_out = 0;
timer = 2000;
}
}

 

This new version It works with every function.

I increased the time from 2000 to 8000 to see how it behaved.
Found that the next Gcode worked without waiting for 8000. This may be caused by incorrect hal linking. I'll check again.

Or must use a spindle-at-speed  to check the correct RPM? before the next G-Code will run But it is complicated to use an encoder from a spindle motor. Because it has revolutions that do not match the actual output from the reduction gear.

andypugh wrote:

It probably makes sense to combine all of the functions into one component.

gear ratio selection, including waiting for zero speed to change gear
spindle to motor gear ratio calculation.
spindle-at-speed determination, based on the encoder feeback (especially if the encoder is on the motor rather than the spindle)
 

This component is in the correct order of operation. It should be developed. But it's beyond my ability to do it. I hope you will add an ebox function. in future versions of Linux CNC