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CHANGELOG.md

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Changelog of MMU2S Firmware

v4.0.2 RMM

  • Idler home current increased
  • Pulley acceleration increased for normal filament type
  • Fixed #223 with reboot recovery implementation and fixed unload bug that failed in some cases
  • #220 fixed, printer now heats, unloads and cuts active filament. Other filaments can then be selected for cut
  • #217 & #219 Issue identified with autodeplete system and fixed that most likely caused this issues
  • #197 implemented new variant for MK3S Bear, not tested by applicant due to lack of comunication
  • MMU Selector made dual blade by default, new models updated here

v4.0.1 RMM

  • Pulled Printer Code upstream to 3.10.1
  • Minimal BLTouch refinements for MK3S printers

v3.3.0 RMM

  • Pulled Printer Code upstream to 3.10.0
  • Implemented BLTouch support for MK3S and created and added extruder hardware to support this.
  • Updated custom variant of MMU2S code for @gizzburn(and others) on issue #210 - double selector blades
  • Fixed issue Error on failure recovery #205
  • Updated readme to reflect new printer FW build environment changes

v3.2.0 RMM

  • Pulled Printer Code upstream to 3.9.3
  • MMU2S Cutter implemented and tested with stock blade location #187
  • Increased MAX_TEMP for all SE HT variants
  • Fixed single print regression issue #192
  • Implemented MMU2S retry #193
  • Variant "MK3S Bondtech Mosquito SE HT Thermistor" added #189
  • MMU2S Code re-organisation
  • Added variant for gizzburn #195

v3.1.0 RMM

  • Pulled Printer Code upstream to 3.9.2

v3.0.3 RMM

  • Implemented PlatformIO build scripts for variants
  • Pulled Printer Code upstream to 3.9.0-RC1
  • Resolved M600 on stock start gcode issue
  • Current tuning for MMU2S drivers to improve reliability

v3.0.2 RMM

  • Printer FW Changes
    • Added LA1.5 Support
    • Eject unheated when not loaded in hotend.
    • M600 Eject issue fixed.
    • SE HT Thermistor fix, brought to my attention by gussner
    • Pulled printer FW to 3.8.1 Final

v3.0.1 RMM

  • MK2.5S Changes
    • Initial home is in stealth mode for 12v situations
    • PinA0 A2D used to sens supply voltage and so far prevent going to Normal mode if not at 24v
  • Pulled thermistor table for SE HT sensor on Bondtech builds
  • Rebased to Stock 3.8.1-RC1

V3.0.0 RMM

  • Incorporated changes from 3.8.0 (7x7, ASA, Sheet Setups, menu updates & autodeplete)
    • Exactly PRUSA Stock FW COMMIT_NR:3274 of 3.8.0+
  • Implemented timer0 @ 30Hz for PWM of Heatbed.
  • Overhaul of the TZB-Comms protocol, now with five data bytes, no CSUM used anymore.
  • Implemented STEALTH mode for those times you don't want sirens going off in your home, hahaha.
  • Changed FINDA Status updates to be received in the background via UART2 ISR. Still requested in the same way.
  • Removed ACK & NACK as I wasn't currently using it and other resend/retry methods are in place for the rare missed payload.
  • Implemented a payload RX timeout on MK3S UART2 ISR at 5microseconds past 7 byte reception. This is to reset the protocol if any garbage appears on the input line.
  • Implemented a seperate 3 byte payload to update FINDA in the background so it doesn't interfear with cmd execution.

V2.1.8 RMM

  • Fixed long bowden cal from 2.1.8-RC2
  • Idler holding current now much lower when not engaged, allowing proper continual homing
    of idler when required as well as less chance of loosing idler steps during engagement.
  • Unload type based sync speeds have now been implemented and configurable in config.h
  • Removed setup menu from boot to remove confusion. Now only accessible via service position.
  • Implemented direct positioning for idler and selector resulting more efficient moves.
  • Changed Jam detection to M219 E, off by default enalbed by adding M219 E at filament start gcode on filaments you want jam detect on
  • load, unload messages changed to status updates on MK3
  • Button debounce implemented for ensure correct button read
  • Implemented toolChange from mmu count instead of the attempt from mk3.

V2.1.7 RMM

  • Skipped due to checksum issues with sending over serial

V2.1.6 RMM

  • Added feedback at start of Active Extruder to MK3 so display is acurate
  • Also added same feedback during load menu commands and feed filament
  • Added feedback from set_positions to update MK3 active filament info display
  • Added a bunch of MK3 messages to advise user of MMU state in setup menu and when it isn't doing a function due to filament detected
  • Added 7x7 MBL
  • Added Jam detection
  • Added Setup guided BowLen and FSensor to BondTech distance setup
  • More action commands added for failure states
    1. // action:m600
    2. // action:mmuAttention
    3. // action:mmuFailedLoad1
    4. // action:mmuFailedLoad2
    5. // action:mmuFailedUnload
    6. // action:jamDetected

V2.1.5 RMM

  • Hotend and extruder motor off when in m600 waiting
  • Added RIGHT Button retract option on failed load
  • Added RIGHT Button retract option after eject when checking tip formation
  • Added MMU2-OFF by putting selector in service position then restarting MK3
    • To re-enable move selector to any filament position then restart MK3

V2.1.4 RMM

  • Added Bowden Length Cal off service menu or holding middle @ boot (you need to cal first filament to end of tube. This is used as a ballpark for those with different length tubes.
  • Implemented entire serial communication re-write. using ISR either side with modbus inspired payload ack-nack.
  • Fully implemented shr16 methods to utilise stepper enable lines and leds are now better handled.
  • Steppers now run a 5m timer when not printing (no hiss, no heat)
  • Implemented MK3 FSensor testing when not printing, disconnect bowden tube and test filaments for reactivity.
  • POWER PANIC is now functional when Printing from SD card.
  • Increased toolSync to 100 changes, as this seams to be plenty sufficient.
  • MK3 Serial Log now idicates tool change count per print. i.e. first T? cmd to U0 cmd.
  • SELECTOR MAX SPEED Reduced to help those with a bit more resistance
  • Idler homing improved further for wider variances in setup. Please ensure no contact with case as this will still present an issue.
  • Two action commands setup to be used with octoprint. "action: m600" & "action: mmuAttention" These can be setup with plugin Action Commands.
  • Bowden Length limit increased t. ~2.8m

V2.1.3 RMM

  • toolChanges every 25
  • Tuned Bowden length for less destructive failed load situation
  • Re-written home on fail to optimise fail recovery
  • Re-written unload sequence for vastly more reliable unloads
  • Load to Extruder start now synced with MMU2 instead of an arbitrary 1.5s wait
  • Tuned load/unload speeds for PLA, tension bolts must be 2-3 full turns past flush to stop grinding

V2.1.2 RMM

  • corrected bug in 20 toolChange rehome resulting in extruder 0 being used for that change instead of intended filament. Eventually results in incorrect execution of T? command as MK3 thinks a different extruder is being used.
  • corrected bug resulting in adjacent filament extruder C0 command amount after you have fixed an issue.
  • MMU now does positive acknowledgement on all commands so it can't miss any as it has been doing
  • improvements for fixTheProblem() that now works better hand in hand with load, unload and FeedFilament issues
  • corrected a moveSmooth() error resulting in a successful move with FINDA enabled even if FINDA never triggered. Now resulting in an error to be fixed by user.

V2.1.1 RMM

  • moveSmooth ACC and FINDA triggering within, defaults ACC to NORMAL and FINDA to false
  • implemented new Karl motion into entire MMU firmware
  • adjusted homing methods and settings, hopefully it works on majority of setups
  • implemented rehome after 20 toolChanges, idea credit to Chuck Kozlowski
  • implemented MK3 comms to confirm when filament arrives at MK3, removed all tube length cal methods
  • implemented fixTheProblem() that pauses for user to fix issue, Middle button to continue, this version fixed loop that was possible if two triggered, nested

Project Fork

  • forked project from V1.0.1 (51aea8692)
  • add QtCreator project file (usable for PlatformIO) used pio init --ide qtcreator for setting it up.
  • reformatted files with clang-format
  • defined some constants for pin toggling
  • rename function park_idler() to engage_filament_pulley() fixes weird negation
  • add many lines of documentation
  • cleanup of static/extern (alias private and public)
  • bugfix of isIdlerParked state, issue #60 and simplified it's calls
  • add move_idler(), move_pulley() and move_selector() instead of move() with 3 arguments, where alway 2 of them were 0
  • remarked some TODOs
  • changed version to a dummy version 9.9.9
  • moved many stepper constants into config.h
  • implement motion control with acceleration mostly fixes issue #52
  • implement fast homing of selector
  • replaced all calls of digitalRead(A1) by isFilamentInFinda()
  • moved menu request button on boot before homing fixes issue #55
  • removed delays on button presses to move the selector (while not printing) fixes #56
  • removed unnecessary engaging pulley before moving selector
  • renamed function from load_filament_in_printer() to load_filament_intoExtruder()
  • simplified load_filament_intoExtruder() by using move-commands onyl useful with TESTING flag, otherwise the filament has wrong speed
  • add explanations on stall gurad and stall guard threshold
  • retract filament on recover_after_eject() useful to inspect tips and continue afterwards
  • reduced delay for buttons on calibrating bowden length from 400ms to 100ms
  • add shell script for formatting (format.sh) using Artistic Style and .astylerc
  • reformatted whole code with new format settings with format.sh
  • merged V1.0.2 into rework branch
  • add define TESTING_STEALTH
  • defined max. speeds and acceleration for normal and stealth mode

V1.0.2

  • fixed current settings
  • stealth mode support
  • anything else?

V1.0.1

  • add separate calibration for each filament channel
  • anything else?

V0.9.0

  • initial release for officially shipped MMU 2.0 kits