Originally shared by Logan Baumgartner
Recently got a 3d printer (reprap) and need some clairifacition on some of the settings…
Need to know what baudrate is, eeprom, control: dead time, dt/pid.
I will leave pictures in the comments.
Also need to know how to reset the orgin.
The pictures are actually in a separate post.
Hello @Logan_Baumgartner , welcome.
You could find answers to these questions anywhere on the internet, but okay, I have some time…
Baudrate: it’s the speed of your connection between your computer and the printer. In theory faster is better, but the usb-port on your printer probably isn’t one of the fastest in the world, so keep the current setting of 115200 baud. It’s safe.
EEPROM: It stands for electrically erasable programmable read-only memory.
It’s where you store the settings of your printer, like how many steps the motors need to make to move a certain distance.
Dead time is a way to control the temperature of your hotend or the bed. see: https://www.repetier.com/dead-time-control/
PID is the same, but a different approach.
“Need to know what baudrate is”.
Man that made me feel old.
PID :
Pid is a way you control something. In this case, its the temperature.
P stands for proportional, meaning I want the temp to be 215 and I’ll check every minute or so. If the temperature isn’t 215, I’ll adjust the voltage to the heater and check the temp again in to next minute. If I’m over 215, I’ll dial the temperature back. Doing this will lead to ripples as you constantly over shoot or undershoot. It means your temperature won’t be very precise and keep fluctuating. The I and D terms below help with the error.
I stands for integral. If every minute, my temperature is not what I want it to be, I sum up the amount that the temperature is versus where I want it to be and use that as an error correction. This value will continue to acculate (integrate) over time and help push me to where I want to be. You add this value to the P portion.
D is for derivative. It measures how fast my temperature is changing. If I’m at 10 degrees but the temperature is getting hot really fast because I have a really good heater, this term will say back off on the amount of heat you are pumping in so you don’t overshoot (or add more heat if the temperature isn’t increasing fast enough or on the cooling side is cooling off faster than I want it to - ie, a fan is blowing so that the temperature drops faster than I expect ). You add this value to both the P and I portions.