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Author Topic: MKS Gen L 1.0  (Read 9000 times)

jinx

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MKS Gen L 1.0
« on: July 10, 2017, 03:25:59 AM »
                     

        mks gen L 1.0 is the latest  8 bit Mega board from Makerbase appeared on the market around April 2017 mks describes it as....

   "Aiming at the problems exist on the open sourced controller board such as Ramps 1.4, the developers in Makerbase specially optimize and develop a new product, MKS Gen_L, which provides more flexible choices for users."

   In short its an updated single board RAMPS which becomes more apparent once you compare the pinout  to the RAMPS  more compact than any board in the Gen series  yet still keeps all the functionality of it predecessors. Noticeable changes is the bed mosfet and the use of CH340 serial port chip rather than the ft232 "removes that threat of bricking  which we saw with FTDI few years back" and odds are you have the drivers already installed for this board the the ch34 common on the mega clones
Power either 12V or 24V
      "Use specific power chip, support 12V-24V power input, and resolve the problems of chip heating and power shortage". though they dont mention which!
                http://reprap.org/wiki/File:Arduinomega1-4connectors.png

   what does appear missing  is the Recoverable fuse for short-circuit protection very least there no mention of one " damned if I know what it looks like! one hopes that task been moved to the power chip".  With a price tag off  £11.50 + postage £3 mks makes it a competitive alternative to the stacked ramps with a variation which include onboard DRV drivers for around £27, take out the 3D we left with a comprehensive ready made arduino motion board for the price of mega.
  size wise 110x84 mm its only the single row drivers that makes it slightly "20 mm or so" wider than the ramps.



     With four mosfet tiny things compered to the ramps three are labelled HY1403 which are rated for 4.5 Amps  two for the dual hotends plus fan control there an additional 12 V out next to X axis which could be used for a V6 fan. nice feature to have for such a budget board.



  The bed mosfet appears identical to the other 3 but  labelled as hy3403 which from what scrap of data I can find is rated at 100V 30A! mighty for a small black slab.  though with the low pricing of the gen L I opted to get external bed controller. rated for 280A peak with a steady 30A." not over kill at all!. each mosfet gets its own blinky.
 
   
      I used both the onboard bed mosfet and the mks mos board, the onboard felt warm to the touch in the shorts test. slow going to heat the mk3 aluminum bed  to 90C.  think I will install the external bed board though. " keeping the high current of the main board"   
     Another feature which crossed over is the boards interface option for controllers, not only are the two headers for the full graphics, Aux1 remains dedicated for the mks touch screen 2.8 or 3.2 only the 2.8 compatible with RAMPS.

 

   

   It's disgustingly simple to get to this stage  of testing the tft install your marlin declare the board as
Code: [Select]
  #define MOTHERBOARD BOARD_MKS_BASE upload marlin to the board " which basically redirects marlin to the ramps pinout!".

pop over to mks github https://github.com/makerbase-mks/MKS-TFT/tree/master/Firmware   select TFT 28 32English2.0.1.zip
unzip it. Two option  red/blue" colour of the icons"> classic> three sub files appears move them to the sd card then attach the ribbon to aux1,insert card and power the Gen L board from 12V source  the tft boots up loads the files and that's all for the tft, never even had to declare in marlin or alter tft file though I will have too later for daul nozzle control.

drivers.
 A4988, DRV8825, TMC2100 and LV8729 no shortage of options with the drivers if they come in the pololu breakout style they're fit.



      The screen printing on the board clearly labelled  and finding the ground as straight forward as turning it over and reading!. to be clear the gnd on the black side of the headers far right. the spacing between the headers has ample clearance to the next when compared to the RAMPS XYZ" almost forcing the devil in!. the other  that not marked are the endstops "  using those breakout boards for endstops keep the red line facing the drivers" refer to the pinout pic above
     In addition to the colour coordinating the axis to the endstop "feature from the mini" there are four pins on the green side those are for external driver signal, " may want a daul Z axis without using a splitter".

 

   
               I like just about everything with this board its well made clean soldering it offers what an advance ramps would do without the need of adapters, layout nice for cooling the whole board and its price makes it affordable for any entry level.

                       


   so long Red Ramps:
              The Ramps a first generation reprap controller been around for 7 years  or so but development stagnated after 1.4 in part because of the propagation of the cheap Red boards from our eastern friends
                 
             Now am not saying RAMPS are bad  in fact I got four starting with 1.3  to 1.4 and there served me well over the years "Green board". But those red ones have a terrible safety record with beginners and the lore of low cost draws many! £13 quid all with drivers, but there shitty use of poor quality fets and crap traces  can leave you wanting!:P
             


Installation of the hotend and fans:

             

  default setting, wiring  straight forward  thou I was expecting the fans to be wired the other way round! part cooler on D7.

                                        ( don't forget the thermistor )


   first  printing test:




links:
MKS Github
https://github.com/makerbase-mks board drivers are there.


http://reprap.org/wiki/ExtThermoCouple_1.0

ftdi debacle:
http://hackaday.com/2016/02/01/ftdi-drivers-break-fake-chips-again/


https://hackaday.io/project/18852-alternative-firmware-for-mks-tft32

32bit IDE
https://www.embitz.org/
« Last Edit: August 09, 2017, 06:00:00 AM by jinx »
I build bots

Santiago

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Re: MKS Gen L 1.0
« Reply #1 on: February 06, 2018, 02:45:03 AM »
Where to find good learning materials?

jinx

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Re: MKS Gen L 1.0
« Reply #2 on: February 06, 2018, 04:32:38 PM »
 ello Santiago welcome to RR,
   
   "Where to find good learning materials?"
         for mks "makerbase"  a tricky one they dont do enough to push there stuff and folks that tend to do write up get brow beaten down from some circles/groups. we rebels are a tolerant bunch.
 the best learning to be found is get a board and tinker with it ask question when not sure, in general 3DP terms  the reprap forums best.
 
I build bots

 

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