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makerbase-mks / MKS-GEN_L

MKS GEN_L is a powerful 3D printer control board with ATMEGA2560 and compatible with RAMPS. V2.1 version the motherboard integrates SPI / UART interface and works with MKS TMC2130/TMC2208 V2.0/TMC2209. It can be used after plugged in. No soldering or flying lead is required ...
https://es.aliexpress.com/item/32802151924.html?spm=a219c.12010612.8148356.1.e4d93944s4tYDC
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Dual Z problem #1

Closed joydi closed 4 years ago

joydi commented 4 years ago

Hi,

i have an problem with the MKS gen l v2.

I want to build an core xy with two z stepper driver i have the tmc2208 on the board.

When i do the following in the configuration.h

define X_DRIVER_TYPE TMC2208

define Y_DRIVER_TYPE TMC2208

define Z_DRIVER_TYPE TMC2208

//#define X2_DRIVER_TYPE A4988 //#define Y2_DRIVER_TYPE A4988

define Z2_DRIVER_TYPE TMC2208

//#define Z3_DRIVER_TYPE A4988

define E0_DRIVER_TYPE TMC2208

and in the configuration_adv.h

define Z_DUAL_STEPPER_DRIVERS

if ENABLED(Z_DUAL_STEPPER_DRIVERS)

//#define Z_DUAL_ENDSTOPS

if ENABLED(Z_DUAL_ENDSTOPS)

#define Z2_USE_ENDSTOP _XMAX_
#define Z_DUAL_ENDSTOPS_ADJUSTMENT  0

endif

endif

at the compiling stage the error

"TMC2208 or TMC2209 on Z2 requires Z2_HARDWARE_SERIAL or Z2SERIAL(RX|TX)_PIN."

comes.

Can you help me ?

Thanks

makerbase-mks commented 4 years ago

Hi, you need pins_MKS_GEN_L_V2.h file, add:

ifndef Z2_SERIAL_TX_PIN

define Z2_SERIAL_TX_PIN 20

endif

ifndef Z2_SERIAL_RX_PIN

define Z2_SERIAL_RX_PIN 21

endif

image

sjasonsmith commented 4 years ago

@makerbase-mks, the AVR SoftwareSerial library requires the pin to support change interrupts, which pin 21 does not.

This results in a communication error when used with Marlin. Can you confirm whether the configuration shown above has actually been tested to work?

I can work around the issue by using a different pin on the board, but that requires added "flying leads" with is contrary to the claims advertised for the board.

makerbase-mks commented 4 years ago
  1. This is indeed a hardware design flaw, and we will improve it in the new version.
  2. If you have E1 UART mode, you can solder the D12 signal to the silkscreen side of R37 resistor. image You need pins_MKS_GEN_L_V2.h file, add:

    ifndef Z2_SERIAL_TX_PIN

    define Z2_SERIAL_TX_PIN 20

    endif

    ifndef Z2_SERIAL_RX_PIN

    define Z2_SERIAL_RX_PIN 12

    endif

borland1 commented 4 years ago

The suggested jumper and soldering would be very difficult to do. Because each TMC2208/TMC2209 one wire serial ( PDN_UART ) utilizes up to four addresses, it would be much easier set same/separate addressing for each driver module (MS1, MS2), then use the same PDN_UART pin for both Z1 and Z2 motor drivers.

This could be accomplished with one wire dupont jumper between ZUART and E1UART. Then optionally, set Z2 driver module by installing single jumper at MS1 to VDD (+5V), while Z1 driver module has no jumpers on MS1 or MS2.

Then in Configuration_adv.h file, assign address for Z2 like this:

define Z1_SLAVE_ADDRESS 0 // default value

define Z2_SLAVE_ADDRESS 1 // leave at 0, or optionally set with MS1 pulled high

sjasonsmith commented 4 years ago

Because each TMC2208/TMC2209 one wire serial ( PDN_UART ) utilizes up to four addresses

This is true for TMC2209 drivers, but TMC2208 do not support addresses; they are always zero.

For 2208 you will need to assign a new RX pin as the MKS post suggested. With Marlin 2.x you can now define the same pin for RX and TX, which would allow you to use a single jumper wire from the servo connector to the E1UART connector, with no soldering required,

AndresCidoncha commented 4 years ago

Hey guys, I tried @sjasonsmith option with Marlin 2.x and seems to work fine, but I have doubts about one thing:

        X   Y   Z   Z2  E
Address     0   0   0   0   0
Enabled     false   false   false   false   false
Set current 1200    1200    1200    1200    1100
RMS current 1160    1160    1160    1160    1049
MAX current 1636    1636    1636    1636    1479
Run current 20/31   20/31   20/31   20/31   18/31
Hold current    10/31   10/31   10/31   10/31   9/31
CS actual   10/31   10/31   10/31   10/31   9/31
PWM scale   12  12  12  12  11
vsense      0=.325  0=.325  0=.325  0=.325  0=.325
stealthChop true    true    true    true    true
msteps      16  16  16  16  16
tstep       max max max max max
PWM thresh. 98  98  660 19  59
[mm/s]      100 100 3   104 30
OT prewarn  false   false   false   false   false
off time    4   4   4   4   4
blank time  24  24  24  24  24
hysteresis
 -end       2   2   2   2   2
 -start     1   1   1   1   1
Stallguard thrs 0   0   0   0   0
DRVSTATUS   X   Y   Z   Z2  E
sg_result   0   0   0   0   0

As you can see, seems to be working, but there are 2 differences between the Z and Z2 values:

                         Z      Z2
PWM thresh. 660 19
[mm/s]      3   104

It's this ok? Shouldn't I have the same value for both drivers?

My setup: Artillery Sidewinder X1 + MKS Gen L v2.0 + TMC2209

ysnuysl commented 2 years ago

Because each TMC2208/TMC2209 one wire serial ( PDN_UART ) utilizes up to four addresses

This is true for TMC2209 drivers, but TMC2208 do not support addresses; they are always zero.

For 2208 you will need to assign a new RX pin as the MKS post suggested. With Marlin 2.x you can now define the same pin for RX and TX, which would allow you to use a single jumper wire from the servo connector to the E1UART connector, with no soldering required,

**Hi sjasonsmith, "With Marlin 2.x you can now define the same pin for RX and TX, allowing you to use a single jumper wire from the servo connector to the E1UART connector without the need for soldering." I don't fully understand this sentence. as suggested by makerbase; "pins_MKS_GEN_L_V2.h file, add:

ifndef Z2_SERIAL_TX_PIN

define Z2_SERIAL_TX_PIN 20

endif

ifndef Z2_SERIAL_RX_PIN

define Z2_SERIAL_RX_PIN 12

I added #endif". Now where should I make a single jumper wire from D12 to E1UART connector without soldering?

ysnuysl@gmail.com**

Gixie69 commented 1 year ago

Im trying to duo Z my Nano V1.2. I have done the Uart but as my drivers are BTT 2209 they have the double ended pins to put jumper cables on. Annoyingly they plug into the WIFI socket on the board though. Wasted money on the wifi module there. Trouble is, I need a second place to plug in the Uart for the second Z as its in the E0 position on the board Does it plug in where the original E0 went? and where does the one for the Z2 Uart go???

Gixie69 commented 1 year ago

On the Robin Nana v1.2, The Wifi socket Green/Black sides, Do the board pins match the stepper driver pin lay out???

daveysir commented 1 year ago

Because each TMC2208/TMC2209 one wire serial ( PDN_UART ) utilizes up to four addresses

This is true for TMC2209 drivers, but TMC2208 do not support addresses; they are always zero.

For 2208 you will need to assign a new RX pin as the MKS post suggested. With Marlin 2.x you can now define the same pin for RX and TX, which would allow you to use a single jumper wire from the servo connector to the E1UART connector, with no soldering required,

Thank you for all the information. I have been fighting to get this working. I did set the pins to

ifndef Z2_SERIAL_TX_PIN

define Z2_SERIAL_TX_PIN 20

endif

ifndef Z2_SERIAL_RX_PIN

define Z2_SERIAL_RX_PIN 12

And put a jumper wire from pin 12 to the left E1UART pin, but i get no result so far. I have the MKS GEN L v2.0 board and 2209 steppers in Standalone mode.

I hope you guys have a clue on what to do. Thanks

daveysir commented 1 year ago

The suggested jumper and soldering would be very difficult to do. Because each TMC2208/TMC2209 one wire serial ( PDN_UART ) utilizes up to four addresses, it would be much easier set same/separate addressing for each driver module (MS1, MS2), then use the same PDN_UART pin for both Z1 and Z2 motor drivers.

This could be accomplished with one wire dupont jumper between ZUART and E1UART. Then optionally, set Z2 driver module by installing single jumper at MS1 to VDD (+5V), while Z1 driver module has no jumpers on MS1 or MS2.

Then in Configuration_adv.h file, assign address for Z2 like this: #define Z1_SLAVE_ADDRESS 0 // default value #define Z2_SLAVE_ADDRESS 1 // leave at 0, or optionally set with MS1 pulled high

Thanks for this info. I also tried this method ( as far as i could understand it ) And soldered a wire from MS1 to VDD on the stepper for the E1 (Z2) and on the board i used a dupont wire from The left E1UART pin to the left ZUART pin. In the firmware i set the pins to

ifndef Z2_SERIAL_TX_PIN

define Z2_SERIAL_TX_PIN 20

endif

ifndef Z2_SERIAL_RX_PIN

define Z2_SERIAL_RX_PIN 21

I use 2209 steppers in standalone mode. I also tried setting the z2_serial_RX_pin to the same as the Z. and i tried the same for the TX pin. This resulted in the second z being very slow. I can't get it to work. hope someone can help me get on the right track

daveysir commented 1 year ago

As a last resort i cut the bottom pin of the pdn (RX) and added a jumper wire on top to pin 12. As aspected.... No result. Because i don't know what i'm doing :'(

daveysir commented 1 year ago

Because each TMC2208/TMC2209 one wire serial ( PDN_UART ) utilizes up to four addresses

This is true for TMC2209 drivers, but TMC2208 do not support addresses; they are always zero.

For 2208 you will need to assign a new RX pin as the MKS post suggested. With Marlin 2.x you can now define the same pin for RX and TX, which would allow you to use a single jumper wire from the servo connector to the E1UART connector, with no soldering required,

I suspect the Servo connector is pin 12? And setting the same pin for RX and TX means they both get pin 20? It is all a bit confusing to me. i'm sorry.