diff --git a/README.md b/README.md index 699ebdd64..e79c142d2 100644 --- a/README.md +++ b/README.md @@ -8,8 +8,9 @@ This RepRap firmware is a mashup between T F you enter the autotemp mode. +You can leave it by calling M109 without any F. +If active, the maximal extruder stepper rate of all buffered moves will be calculated, and named "maxerate" [steps/sec]. +The wanted temperature then will be set to t=tempmin+factor*maxerate, while being limited between tempmin and tempmax. +If the target temperature is set manually or by gcode to a value less then tempmin, it will be kept without change. +Ideally, your gcode can be completely free of temperature controls, apart from a M109 S T F in the start.gcode, and a M109 S0 in the end.gcode. + +EEPROM: +If you know your PID values, the acceleration and max-velocities of your unique machine, you can set them, and finally store them in the EEPROM. +After each reboot, it will magically load them from EEPROM, independent what your Configuration.h says. + +LCD Menu: +If your hardware supports it, you can build yourself a LCD-CardReader+Click+encoder combination. It will enable you to realtime tune temperatures, +accelerations, velocities, flow rates, select and print files from the SD card, preheat, disable the steppers, and do other fancy stuff. +One working hardware is documented here: http://www.thingiverse.com/thing:12663 +Also, with just a 20x4 or 16x2 display, useful data is shown. + +SD card folders: +If you have an SD card reader attached to your controller, also folders work now. Listing the files in pronterface will show "/path/subpath/file.g". +You can write to file in a subfolder by specifying a similar text using small letters in the path. +Also, backup copies of various operating systems are hidden, as well as files not ending with ".g". + +Endstop trigger reporting: +If an endstop is hit while moving towards the endstop, the location at which the firmware thinks that the endstop was triggered is outputed on the serial port. +This is useful, because the user gets a warning message. +However, also tools like QTMarlin can use this for finding acceptable combinations of velocity+acceleration. + +Coding paradigm: +Not relevant from a user side, but Marlin was split into thematic junks, and has tried to partially enforced private variables. +This is intended to make it clearer, what interacts which what, and leads to a higher level of modularization. +We think that this is a useful prestep for porting this firmware to e.g. an ARM platform in the future. +A lot of RAM (with enabled LCD ~2200 bytes) was saved by storing char []="some message" in Program memory. +In the serial communication, a #define based level of abstraction was enforced, so that it is clear that +some transfer is information (usually beginning with "echo:"), an error "error:", or just normal protocol, +necessary for backwards compatibility. + +Interrupt based temperature measurements: +An interrupt is used to manage ADC conversions, and enforce checking for critical temperatures. +This leads to less blocking in the heater management routine. + +======================================================================================== +Non-standard M-Codes, different to an old version of sprinter: + +G2 - CW ARC +G3 - CCW ARC + +General: +M17 - Enable/Power all stepper motors +M18 - Disable all stepper motors; same as M84 +M30 - Print time since last M109 or SD card start to serial +M42 - Change pin status via gcode +M80 - Turn on Power Supply +M81 - Turn off Power Supply +M114 - Output current position to serial port +M119 - Output Endstop status to serial port +Movement variables: +M202 - Set max acceleration in units/s^2 for travel moves (M202 X1000 Y1000) Unused in Marlin!! +M203 - Set maximum feedrate that your machine can sustain (M203 X200 Y200 Z300 E10000) in mm/sec +M204 - Set default acceleration: S normal moves T filament only moves (M204 S3000 T7000) im mm/sec^2 also sets minimum segment time in ms (B20000) to prevent buffer underruns and M20 minimum feedrate +M220 - set build speed factor override percentage S:factor in percent ; aka "realtime tuneing in the gcode" +M301 - Set PID parameters P I and D +M400 - Finish all moves + +Advance: +M200 - Set filament diameter for advance +M205 - advanced settings: minimum travel speed S=while printing T=travel only, B=minimum segment time X= maximum xy jerk, Z=maximum Z jerk + +EEPROM: +M500 - stores paramters in EEPROM +M501 - reads parameters from EEPROM (if you need reset them after you changed them temporarily). +M502 - reverts to the default "factory settings". You still need to store them in EEPROM afterwards if you want to. +======================================================================================== + + Configuring and compilation -Install the latest arduino software IDE/toolset (currently 0022) +Install the arduino software IDE/toolset v22 http://www.arduino.cc/en/Main/Software Install Ultimaker's RepG 25 build http://software.ultimaker.com -(or alternatively install Kliment's printrun/pronterface https://github.com/kliment/Printrun_) +For SD handling and as better substitute (apart from stl manipulation) download +the very nice Kliment's printrun/pronterface https://github.com/kliment/Printrun Copy the Ultimaker Marlin firmware - https:/github.com/bkubicek/Marlin + https://github.com/ErikZalm/Marlin/tree/Marlin_v1 (Use the download button) Start the arduino IDE. -Select Tools -> Board -> Arduino Mega 2560 +Select Tools -> Board -> Arduino Mega 2560 or your microcontroller Select the correct serial port in Tools ->Serial Port Open Marlin.pde