Differences

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--- mycnc:independent_pulse_generator [2019/10/03 14:31] – ivan
+++ mycnc:independent_pulse_generator [2019/10/04 09:36] – ivan
@@ Line 198: / Line 198: @@
 When utilizing the Hardware PLC, you MUST use the "raw" value register entry (8130) and independently take into account the multiplier (in the PLC code), as no such helpful conversion is available.
-**Independent Pulse Generator Spindle implementation example**
+===Independent Pulse Generator Spindle implementation example===
 . Add the code that enables the generator into the Hardware PLC procedure M03.plc (spindle ON procedure). It is convenient to add code to the end of the procedure before the exit(99); line.
@@ Line 243: / Line 243: @@
   exit (99); // normal exit
 </code>
+{{plc:mycnc-spindle-pulse-dir-001.png}}
+{{plc:mycnc-spindle-pulse-dir-002.png}}
+{{plc:mycnc-spindle-pulse-dir-003.png}}
 In this implementation, the pulse-dir generation will be switched ON simultaneously with the classic control (a + 0-10V relay analog output). It is assumed that an unused spindle will be shut off physically by the operator and that the additional control signal will not affect operation.
@@ Line 254: / Line 261: @@
 </code>
-In this example, we are assuming that the speed of a conventional spindle is 24,000 rpm. This value, respectively, is registered as the maximum spindle speed in the settings (//Settings > Config > Technology > Mill/Lathe > Spindle//). At this spindle speed, a full 10V signal must be sent to the analog output, so the "voltage ratio" coefficient is set to "1" (in the case of, for example, a spindle with an input signal range of 0-5V, this coefficient would be 0.5 to get a 5V signal at maximum speed).
+In this example, we are assuming that the speed of a conventional spindle is 24,000 rpm. This value, respectively, is registered as the maximum spindle speed in the settings (//Settings > Config > Technology > Mill/Lathe > Spindle//).
+{{plc:mycnc-spindle-pulse-dir-004.png}}
+At this spindle speed, a full 10V signal must be sent to the analog output, so the "voltage ratio" coefficient is set to "1" (in the case of, for example, a spindle with an input signal range of 0-5V, this coefficient would be 0.5 to get a 5V signal at maximum speed).
 When calling the PLC procedures for turning ON the spindle (M03.plc) and changing the spindle speed (SPN.plc), the spindle speed value is stored in the **eparam** variable.
 myCNC controllers have 12-bit registers for PWM and DAC at 0-10V.This means that with a maximum spindle speed of **24000 rpm** and a factor of **1**, the ''eparam'' variable will have a maximum value of 4095.
@@ Line 262: / Line 273: @@
 Assume that the maximum servo spindle speed is 4,500 rpm. Then the ''eparam'' value at a speed of 4500 rpm will be:
-<code> 4500 * (4095/24000) = 768</code>
+<code> 4500 * (4095 ÷ 24000) = 768</code>
 The Pulse-Dir input of the servo spindle is set to 10,000 pulses, i.e. the motor shaft will make a full revolution every 10,000 pulses. Then, to achieve a full speed of 4500 rpm, the following pulse rate is required:
-<code>10000 * (4500/60) = 750 000</code>
+<code>10000 * (4500 ÷ 60) = 750 000</code>
-The register RAW value for 750kHz (750,000Hz) should be
+The register RAW value for 750kHz (750,000Hz) will therefore be calculated as follows:
-<code> 750000 / 0.0014549 = 515499347</code>
+<code> 750000 ÷  0.0014549 = 515499347</code>
-If the maximum speed corresponds to the ''eparam'' value of "768", then the value of the coefficient to obtain "515499347" will be
+If the maximum speed corresponds to the ''eparam'' value of "768", then the value of the coefficient to obtain "515499347" will be calculated as follows:
-<code> 515499347/768 = 671223</code>
+<code> 515499347 ÷ 768 = 671223</code>
 By setting these values in the M03.plc and SPN.plc procedures, we will generate the required 750 kHz frequency when the spindle speed is set to 4500, as well as smooth frequency control over the entire range from 0 to 4500 rpm.
-**A method for evaluating the required acceleration of a generator**
+===A method for evaluating the required acceleration of a generator===
 One unit of the generator acceleration is, by a very rough approximation, 1 impulse / s2. This means that with such an acceleration, the generator “accelerates”  to a frequency of 1 Hz in 1 second. If, in our case, the maximum frequency is 750,000, then the acceleration must be equal to the same value in order to “accelerate” to this frequency in 1 second.
-**Test code for spindle start-up and spindle speed adjustment procedures**:
+===Test code for spindle start-up and spindle speed adjustment procedures===
 <code C M03.plc>
@@ Line 323: / Line 334: @@
-  //delay after spindle started
+  //delay after the spindle was turned on
   timer=spindle_on_delay;
-  do{timer--;}while (timer>0); //delay for Spindle reach given speed
+  do{timer--;}while (timer>0); //delay until the spindle reaches the given speed
   exit(99);	//normal exit
@@ Line 333: / Line 344: @@
 <code C SPN.plc>
 #include vars.h
-//set Spindle speed control via DAC
+//set the Spindle Speed through DAC
 main()
 {
@@ Line 346: / Line 357: @@
   {
     k=671223;
-    freq=val*k; //calculate the RAW frequency
+    freq=val*k; //calculate the RAW frequency using the multiplier
     if (freq>515499348) {freq=515499348;};
     gvarset(8130,freq); timer=30;do{timer--;}while(timer>0); //30ms delay
@@ Line 358: / Line 369: @@
 ==== Low level CNC registers to control independent pulse generator ====
-This is for records only. Users don't have to utilize these settings which are changed by having low-level access to the controller.
+This is for records only. Users don't have to utilize these settings which can be altered only by having low-level access to the controller.
 ^ Register Name ^ Address ^ Description ^