I have a problem with Serial3 reception which freezes the system. I hope during these days I can fix it. Newer Topic Older Topic. Print View RSS. Sorry, only registered users may post in this forum.
Click here to login. This forum is powered by Phorum. Registered: 1 year ago Posts: 3. Copy and paste this source URL. An internet connection is required. This is the name of your printer as displayed on the LCD and by M A unique ID for your 3D printer.
A suitable unique ID can be generated randomly at uuidtools. Some host programs and slicers may use this identifier to differentiate between specific machines on your network. This value, from 0 to 6, defines how many extruders or E steppers the printer has. By default Marlin will assume separate nozzles all moving together on a single carriage. If you have a single nozzle, a switching extruder, a mixing extruder, or dual X carriages, specify that below. If you typically use 1.
This value is used by Marlin to compensate for Filament Width when printing in volumetric mode See M , and by the Unified Bed Leveling command G26 when printing a test grid. You can override this value with M W.
In a single-nozzle setup, only one filament drive is engaged at a time, and each needs to retract before the next filament can be loaded and begin purging and extruding. This requires a free serial port on your printer board. To use the MMU2 you also have to. A Switching Extruder is a dual extruder that uses a single stepper motor to drive two filaments, but only one at a time.
The servo is used to switch the side of the extruder that will drive the filament. The E motor also reverses direction for the second filament. A Switching Nozzle is a carriage with 2 nozzles. A servo is used to move one of the nozzles up and down. The servo either lowers the active nozzle or raises the inactive one. Two separate X-carriages with extruders that connect to a moving part via a solenoid docking mechanism.
Two separate X-carriages with extruders that connect to a moving part via a magnetic docking mechanism using movements and no solenoid. Support for swappable and dockable toolheads, such as the E3D Tool Changer. Toolheads are locked with a servo.
Support swappable and dockable toolheads with a magnetic docking mechanism using movement and no servo. Supports more than 2 toolheads. A Mixing Extruder uses two or more stepper motors to drive multiple filaments into a mixing chamber, with the mixed filaments extruded from a single nozzle. This option adds the ability to set a mixture, to save mixtures, and to recall mixtures using the T command.
The extruder still uses a single E axis, while the current mixture is used to determine the proportion of each filament to use. Hotend offsets are needed if your extruder has more than one nozzle. These values specify the offset from the first nozzle to each nozzle. So the first element is always set to 0. The next element corresponds to the next nozzle, and so on.
Add more offsets if you have 3 or more nozzles. This option allows the controller board to switch the power supply 12V on and off with M80 and M This is for printers that have dual power supplies. For instance some setups have a separate power supply for the heaters. In this situation you can save power by leaving the power supply off until needed. Temperature sensors are vital components in a 3D printer.
Fast and accurate sensors ensure that the temperature will be well controlled, to keep plastic flowing smoothly and to prevent mishaps. Use these settings to specify the hotend and bed temperature sensors.
Every 3D printer will have a hotend thermistor, and most will have a bed thermistor. The listing above these options in Configuration. Try to match your brand and model with one of the sensors in the list. It is crucial to obtain accurate temperature measurements. Marlin provides two dummy sensors for testing purposes. Set their constant temperature readings here. Enable this option to use sensor 1 as a redundant sensor for sensor 0.
This is an advanced way to protect against temp sensor failure. These parameters help prevent the printer from overheating and catching fire. Temperature sensors report abnormally low values when they fail or become disconnected.
Set these to the lowest value in degrees C that the machine is likely to experience. Indoor temperatures range from 10CC, but a value of 0 might be appropriate for an unheated workshop. Or the machine is just very cold. Maximum temperature for each temperature sensor. If Marlin reads a temperature above these values, it will immediately shut down for safety reasons. For the E3D V6 hotend, many use as a maximum value. Use blower fans to keep air moving and use a Dew Point Calculator to check your local dew point.
When PID values are set correctly, heaters reach their target temperatures faster, maintain temperature better, and experience less wear over time. Most vitally, correct PID settings will prevent excessive overshoot, which is a safety hazard. During PID calibration, use the highest target temperature you intend to use where overshoots are more critical. Bang-bang is a pure binary mode - the heater is either fully-on or fully-off for a long period. PID control uses higher frequency PWM and in most cases is superior for maintaining a stable temperature.
The PID values you get from M may be very different, but will be better for your specific machine. M can be used to set bed PID. M should be used to tune PID values before using any new hotend components. The max power delivered to the bed. All forms of bed control obey this PID, bang-bang, bang-bang with hysteresis.
Setting this to anything other than enables a form of PWM. Override this setting with M if needed. A lengthy extrusion may not damage your machine, but it can be an awful waste of filament.
This feature is meant to prevent a typo or glitch in a G1 command from extruding some enormous amount of filament. Thermal protection is one of the most vital safety features in Marlin, allowing the firmware to catch a bad situation and shut down heaters before it goes too far. Consider what happens when a thermistor comes loose during printing. The firmware sees a low temperature reading so it keeps the heat on. As long as the temperature reading is low, the hotend will continue to heat up indefinitely, leading to smoke, oozing, a ruined print, and possibly even fire.
In most setups these can be left unchanged, but should be tuned as needed to prevent false positives. Heating may be slowed in a cold environment, if a fan is blowing on the heat block, or if the heater has high resistance.
Cartesian is the simplest, applying each stepper directly to an axis. CoreXY uses a special belt arrangement to do XY motion, requiring a little extra maths. Enable the option that applies to the specific Core setup. Both normal and reversed options are included for completeness. In open loop systems, endstops are an inexpensive way to establish the actual position of the carriage on all axes. If the machine gets out of step for any reason, re-homing may be required.
Specify all the endstop connectors that are connected to any endstop or probe. Most printers will use all three min plugs. On delta machines, all the max plugs should be used. Probes can share the Z min plug, or can use one or more of the extra connectors.
By default all endstops have pullup resistors enabled. Use M to test if these are set correctly. These settings allow Marlin to tune stepper driver timing and enable advanced options for stepper drivers that support them. Enable this feature if all enabled endstop pins are interrupt-capable. This will remove the need to poll the interrupt pins, saving many CPU cycles.
With this setting you can optionally specify different steps-per-mm, max feedrate, and max acceleration for each extruder. These are the most crucial settings for your printer, as they determine how accurately the steppers will position the axes. These depend on various factors, including belt pitch, number of teeth on the pulley, thread pitch on leadscrews, micro-stepping settings, and extruder style.
Override with M Setting these too high will cause the corresponding stepper motor to lose steps, especially on high speed movements. Also see the jerk settings below, which specify the largest instant speed change that can occur between segments. Jerk sets the floor for accelerated moves.
If the change in top speed for a given axis between segments is less than the jerk value for the axis, an instantaneous change in speed may be allowed. Limits placed on other axes also apply. Basically, lower jerk values result in more accelerated moves, which may be near-instantaneous in some cases, depending on the final acceleration determined by the planner. The planner uses the default accelerations set here or by M as the starting values for movement acceleration, and then constrains them further, if needed.
There are separate default acceleration values for printing moves, retraction moves, and travel moves. During movement planning, Marlin constrains the default accelerations to the maximum acceleration of all axes involved in the move. Larger acceleration values can lead to excessive vibration, noisy steppers, or even skipped steps. Lower acceleration produces smoother motion, eliminates vibration, and helps reduce wear on mechanical parts.
Junction Deviation is now the default mode. Jerk works in conjunction with acceleration see above. It can also be thought of as the minimum change in velocity that will be done as an accelerated not instantaneous move. Both acceleration and jerk affect your print quality. If jerk is too low, the extruder will linger too long on small segments and corners, possibly leaving blobs.
Junction Deviation determins the cornering speed. The smaller the value the slower the cornering speed will be. Use this option in all cases when the probe is connected to the Z MIN endstop plug. You can use this option to configure a machine with no Z endstops. Marlin supports any kind of probe that can be made to work like a switch. View Full Term. By clicking sign up, you agree to receive emails from Techopedia and agree to our Terms of Use and Privacy Policy.
A serial port is an interface that allows a PC to transmit or receive data one bit at a time. It is one of the oldest types of interfaces and at one time was commonly used to connect printers and external modems to a PC. Modern serial ports are used in scientific instruments, shop till systems such as cash registers and applications like industrial machinery systems. Normally, a serial port is a male port, while a parallel port is a female port. The serial port standard is RS This standard is used for transmitting serial communication between devices, which are usually called data communications equipment DCE and data terminal equipment DTE.
The serial port uses a nine-pin DE-9 connector or a pin DB connector. Hell, he says Koenig never referred to it as Serial or even as a podcast. In all fairness to Jay, he told The Intercept that he never expected to be a major figure in Serial. His keepers fed the beast copious amounts of port, Champagne, and whiskey to pacify the persnickety pachyderm. Interviews in Serial including ones from Adnan do acknowledge that Jay was known as a resident bad boy at Woodlawn High School.
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