diff --git a/Documentation/Features.md b/Documentation/Features.md deleted file mode 100644 index b306741e8f7d3fa4592917d8240858e626da7ba8..0000000000000000000000000000000000000000 --- a/Documentation/Features.md +++ /dev/null @@ -1,112 +0,0 @@ -# Features - -* Interrupt based movement with real linear acceleration -* High steprate -* Look ahead (Keep the speed high when possible. High cornering speed) -* Interrupt based temperature protection -* Preliminary support for [Matthew Roberts Advance Algorithm](http://reprap.org/pipermail/reprap-dev/2011-May/003323.html) -* Full endstop support -* SD Card support -* SD Card folders (works in pronterface) -* SD Card autostart support -* LCD support (ideally 20x4) -* LCD menu system for autonomous SD card printing, controlled by an click-encoder. -* EEPROM storage of e.g. max-velocity, max-acceleration, and similar variables -* many small but handy things originating from bkubicek's fork. -* Arc support -* Temperature oversampling -* Dynamic Temperature setpointing aka "AutoTemp" -* Support for [QTMarlin](https://github.com/bkubicek/QTMarlin), a very beta GUI for PID-tuning and velocity-acceleration testing. -* Endstop trigger reporting to the host software. -* Updated sdcardlib -* Heater power reporting. Useful for PID monitoring. -* PID tuning -* [CoreXY kinematics](www.corexy.com/theory.html) -* Delta kinematics -* SCARA kinematics -* Dual X-carriage support for multiple extruder systems -* Configurable serial port to support connection of wireless adaptors. -* Automatic operation of extruder/cold-end cooling fans based on nozzle temperature -* RC Servo Support, specify angle or duration for continuous rotation servos. -* Bed Auto Leveling. -* Support for a filament diameter sensor, which adjusts extrusion volume - -The default baudrate is 250000. This baudrate has less jitter and hence errors than the usual 115200 baud, but is less supported by drivers and host-environments. - -## Differences and additions to the already good Sprinter firmware - -### Look-ahead - -Marlin has look-ahead. While sprinter has to break and re-accelerate at each corner, -lookahead will only decelerate and accelerate to a velocity, -so that the change in vectorial velocity magnitude is less than the xy_jerk_velocity. -This is only possible, if some future moves are already processed, hence the name. -It leads to less over-deposition at corners, especially at flat angles. - -### Arc support - -Slic3r can find curves that, although broken into segments, were ment to describe an arc. -Marlin is able to print those arcs. The advantage is the firmware can choose the resolution, -and can perform the arc with nearly constant velocity, resulting in a nice finish. -Also, less serial communication is needed. - -### Temperature Oversampling - -To reduce noise and make the PID-differential term more useful, 16 ADC conversion results are averaged. - -### AutoTemp - -If your gcode contains a wide spread of extruder velocities, or you realtime change the building speed, the temperature should be changed accordingly. -Usually, higher speed requires higher temperature. -This can now be performed by the AutoTemp function -By calling M109 S<mintemp> B<maxtemp> F<factor> 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 directories - -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". - -### Autostart - -If you place a file auto[0-9].g into the root of the sd card, it will be automatically executed if you boot the printer. The same file will be executed by selecting "Autostart" from the menu. -First *0 will be performed, than *1 and so on. That way, you can heat up or even print automatically without user interaction. - -### 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.