Cons-n-Stuff/PCB-reflow-solder-heat-plate
1
0
Fork 0
mirror of https://github.com/DerSpatz/PCB-reflow-solder-heat-plate.git synced 2025-02-25 21:58:09 +01:00
Code Issues Packages Projects Releases Wiki Activity

Fixed second temperature point bug

Browse Source
This commit is contained in:
Nathan 2022-04-15 17:27:53 -07:00
parent fe4dea89f5
commit 9fa7317b44
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
Firmware/pcb_reflow_fw/pcb_reflow_fw.ino
View File

@ -75,6 +75,7 @@ byte max_temp_index = 0;
#define MAX_RESISTANCE 10.0
float bed_resistance = 0.9;
#define MAX_AMPERAGE 5.0
#define PWM_VOLTAGE_SCALAR 5.0
// EEPROM storage locations
#define CRC_ADDR 0
@ -626,7 +627,7 @@ bool heat(byte max_temp, int profile_index) {
v = getVolts();
float max_possible_amperage = v / bed_resistance;
// TODO(HEIDT) approximate true resistance based on cold resistance and temperature
float vmax = (MAX_AMPERAGE * bed_resistance);
float vmax = (MAX_AMPERAGE * bed_resistance) * PWM_VOLTAGE_SCALAR;
int min_PWM = 255 - ((vmax * 255.0) / v);
min_PWM = constrain(min_PWM, 0, 255);
debugprint("Min PWM: ");
@ -654,8 +655,9 @@ bool heat(byte max_temp, int profile_index) {
return 1;
}
// otherwise, get the next goal temperature and runtime, and do the process again
last_time = 0.0;
start_temp = t;
goal_temp = profiles[profile_index].fraction[current_step];
goal_temp = profiles[profile_index].fraction[current_step] * max_temp;
step_runtime = profiles[profile_index].fraction[current_step] -
profiles[profile_index].fraction[current_step - 1];
step_start_time = millis() / 1000.0;