Configs for PCB PnP for Duet3D 6XD and 3 x 3HC expansion boards

droftarts

@developeralgo222 I'm running out of ideas. As far as I can tell, there's nothing stopping the Duet sending step pulses to the motor driver, and it thinks the drive is moving, because the axis position is updated.

I am wondering if the motor energising is a red herring, and it's not actually enabling, because it's not going into an alarm condition:

ALM：Alarm indicator light: ... if the red light is flicker three times within 3 seconds, that means position ultra difference or the encoder connector is disconnected.

I don't think it's even registering it should move, because the driver is not enabled. Does the motor energise as soon as power is applied to the driver (with the Duet off), or only once the Duet is turned on?

How is the 3-pin 'Driver active enable select' jumper, next to Driver 1, set? I think the jumper is between EN_POL and GND, which should be correct for this drive:

The Enable output is either low when "on" and high impedance when "off", or vice versa, depending on the position of the 'Driver Enable Polarity' (En_Pol) jumper.

Also try changing M569 R parameter to R0:

Rnnn Driver enable polarity: 0 = active low, 1 = active high, -1 = driver is always disabled and is not monitored (default 0)

Another option is to try disconnecting +5V and -EN from the stepper driver, because external drivers are often active with no signal on the enable line, to allow for simpler systems which only have step and direction outputs.

The only other thing I can think of is to put an oscilloscope on the Duet outputs.

Ian

o_lampe

@developeralgo222 said in Configs for PCB PnP for Duet3D 6XD and 3 x 3HC expansion boards:

(2) M98 P"config.g" when sent it disconnects and nothing happens

I would start investigating this issue first, because it is a critical error. You might damage the onboard 5V regulator if it's a overcurrent shutdown...
Other stuff might solve itself after you've found the reason for the disconnects.

developeralgo222

@o_lampe

I finally got a MACH 3 Controller board and MACH 3 software to test the X & Y Axis motors( NEMA 34 8.5N.m (86HSE8N-BC38) ) and External Driver (HSS86) . The Motors work fine no issue they are able to move Left to Right on X-axis and Forward and back on Y-axis. Confirming that the following connections from Motor to Driver are correct (NEMA 34 Motor Power & Encoder connections) The only thing i changed for the test is the Signal wiring to comply with the MACH 3 Controller

On Duet 3 6XD

Signal Connection:

External Drive (HSS86) --------> (Cable Color) ------> Duet 3 6XD Drive_x

PUL+ , DIR+, ENA+, ALM+ --------> (Red) ------> 5V_EXT
PUL- --------> (Blue) ------> Dx_STEP-
DIR- --------> (Yellow) ------> Dx_DIR-
ENA- --------> (Green) ------> Dx_EN-
ALM- --------> (Black) ------> Dx_ERR

On MACH 3 Control Board with USB Motion Driver RnRMotion.dll installed

Signal Connection:

External Drive (HSS86) --------> (Cable Color) ------> MACH 3 Controller X-axis

PUL+ --------> (Red) ------> XP
PUL- --------> (Green) ------> GND
DIR+ --------> (Yellow) ------> XD
PUL- to DIR - (Drive side only) ----> (Black)

It seems on MACH 3 if you compare it to Duet 6XD connections it seems they are reversed as @droftarts mentioned

PUL+ --------> (Red) ------> XP ( Dx_STEP+ )
DIR+ --------> (Yellow) ------> XD ( Dx_DIR+ )
ENA+ --------> (Blue) ------> XE ( Dx_ENA+ ) ******?
ALM+ --------> (Black) ------> XA ( Dx_ALM+ ) ******?
PUL- , DIR-, ENA- , ALM- --------> (Green) ------> GND

It seems the issue is on the Duet 3 6XD side configuration and the signal connection from the external drive. Not sure how to do this on Duet 6XD

droftarts

@developeralgo222 it looks like the driver is switched the other way around from ‘normal’ drivers, in that it needs a +5V signal with a common ground, rather than having a common +5V that is pulled to ground by a signal. It’s a shame the data sheet is so sparse on details. Where did you find the info on wiring up the Mach 3 controller?

I’ll have to ask @dc42 in the morning if the 6XD can do that.

If you are thinking it’s a configuration error, especially if sending M98 P"config.g" causes a reset, create a basic config.g that only sets the X and Y axes.

Ian

developeralgo222

@droftarts said in Configs for PCB PnP for Duet3D 6XD and 3 x 3HC expansion boards:

@developeralgo222 it looks like the driver is switched the other way around from ‘normal’ drivers, in that it needs a +5V signal with a common ground, rather than having a common +5V that is pulled to ground by a signal. It’s a shame the data sheet is so sparse on details. Where did you find the info on wiring up the Mach 3 controller?

Just on youtube and google search , an online user made a demo on how to test the same setup on youtube and someone explained how to connect MACH 3 controller and to NEMA 34 motors

MACH 3 Controller connection to HSS86 Drive + Nema 34 closed Motor

MACH3 Controller installation and Wiring

This is a very simple NEMA 34 closed Loop/External Drive connection to 6XD not sure why it would not work

droftarts

@developeralgo222 does it lock up the same way as when connected to the 6XD? On the Mach3 board there’s nothing connected to enable. I suggested disconnecting the enable wires earlier.

With enable wires connected, M17 enables and M18 disables motors.

Ian

developeralgo222

@droftarts said in Configs for PCB PnP for Duet3D 6XD and 3 x 3HC expansion boards:

@developeralgo222 does it lock up the same way as when connected to the 6XD? On the Mach3 board there’s nothing connected to enable. I suggested disconnecting the enable wires earlier.

With enable wires connected, M17 enables and M18 disables motors.

Ian

M17: Enable/Power all stepper motors
M18: Disable all stepper motors

Does this mean it only applies to Open Loop Stepper motors or even closed Loop ?

droftarts

@developeralgo222 Good point, I'm not sure. I don't have an external driver and motor setup to test.

Ian

developeralgo222

@droftarts said in Configs for PCB PnP for Duet3D 6XD and 3 x 3HC expansion boards:

@developeralgo222 Good point, I'm not sure. I don't have an external driver and motor setup to test.

Ian

Even with M17 included in the config.g for Duet 6XD. it does not move X and Y at all


; Enable All the drives 
M17  ; Enable All the drives

droftarts

@developeralgo222 I asked this earlier:
Does it lock up the same way when enabled on the Mach3 board, as it does when connected to the 6XD?
On the Mach3 board there’s nothing connected to enable, which would seem to mean it needs an enable low signal. Have you tried disconnecting the enable when connected to the 6XD?

Ian

developeralgo222

@droftarts said in Configs for PCB PnP for Duet3D 6XD and 3 x 3HC expansion boards:

@developeralgo222 I asked this earlier:
Does it lock up the same way when enabled on the Mach3 board, as it does when connected to the 6XD?
On the Mach3 board there’s nothing connected to enable, which would seem to mean it needs an enable low signal. Have you tried disconnecting the enable when connected to the 6XD?

Ian

on MACH 3 it locks UP, when you power up and its energized and then when you config and Reset your MACH 3 , it unlocks and you can start jogging the motors right away . Looking at the schematics of the wiring diagram . it seems to indicate that the wiring should be

PUL+ --------> (Red) ------> XP ( Dx_STEP+ )
DIR+ --------> (Yellow) ------> XD ( Dx_DIR+ )
ENA+ --------> (Blue) ------> XE ( Dx_ENA+ ) ******?
ALM+ --------> (Black) ------> XA ( Dx_ALM+ ) ******?
PUL- , DIR-, ENA- , ALM- --------> (Green) ------> GND

How can it be done on Duet 3 6XD ? . Duet 3 6XD must have a way of doing this ?

droftarts

@developeralgo222 The way that wiring diagram is, is EXACTLY how the 6XD is wired! It has a common +5V going to PUL+, DIR+ and ENA+. Then the PUL-, DIR- and ENA- are wired to the controller pins that pull that +5V to GND when the pin is active. This is the 'normal' way of wiring these drivers.
It's the Mach3 layout that doesn't match this wiring diagram, as it seems to be send +5V signals in to PUL+ and DIR+, and has a common GND connecting PUL- and DIR-.
However, both should work, as it's just sending a signal.

@developeralgo222 said in Configs for PCB PnP for Duet3D 6XD and 3 x 3HC expansion boards:

on MACH 3 it locks UP, when you power up and its energized and then when you config and Reset your MACH 3 , it unlocks and you can start jogging the motors right away .

This sounds like the functionality that we need to replicate. Like I've said, the enable wires aren't connected on either of the links you sent. My best guess is that the enable signal isn't quite right, but it seems to work with Mach3 with enable disconnected. Disconnect the enable wires.

Edit: Check continuity on all the wires from the Duet driver 0 connector to the motor driver. Maybe there's a bad crimp or poor connection somewhere along the line.

Ian

developeralgo222

@droftarts said in Configs for PCB PnP for Duet3D 6XD and 3 x 3HC expansion boards:

@developeralgo222 said in [Configs for PCB PnP for Duet3D 6XD and 3 x 3HC expansion boards]
This sounds like the functionality that we need to replicate. Like I've said, the enable wires aren't connected on either of the links you sent. My best guess is that the enable signal isn't quite right, but it seems to work with Mach3 with enable disconnected. Disconnect the enable wires.

@droftarts , i disconnected and the ENABLE Wires from the External Drive and the Duet 6XD and that did the trick. Now i am able to move X and Y -axis Motors now

dc42

@developeralgo222 in that case, to make the Enable line work properly you need to move the Driver Enable Polarity jumper on the 6XD to the other position. See https://docs.duet3d.com/Duet3D_hardware/Duet_3_family/Duet_3_Mainboard_6XD_Hardware_Overview#description-of-connections.

developeralgo222

@dc42 said in Configs for PCB PnP for Duet3D 6XD and 3 x 3HC expansion boards:

@developeralgo222 in that case, to make the Enable line work properly you need to move the Driver Enable Polarity jumper on the 6XD to the other position. See https://docs.duet3d.com/Duet3D_hardware/Duet_3_family/Duet_3_Mainboard_6XD_Hardware_Overview#description-of-connections.

Currently the 1 x3 Pin Jumper (Driver Active Enable Select ) is in the Active Enable Position(Left Side) . I will move it to the Active Disable position (Right Side) and then connect the ENA+ & ENA- and test again

developeralgo222

@developeralgo222 said in Configs for PCB PnP for Duet3D 6XD and 3 x 3HC expansion boards:

@dc42 said in Configs for PCB PnP for Duet3D 6XD and 3 x 3HC expansion boards:

@developeralgo222 in that case, to make the Enable line work properly you need to move the Driver Enable Polarity jumper on the 6XD to the other position. See https://docs.duet3d.com/Duet3D_hardware/Duet_3_family/Duet_3_Mainboard_6XD_Hardware_Overview#description-of-connections.

Currently the 1 x3 Pin Jumper (Driver Active Enable Select ) is in the Active Enable Position(Left Side) . I will move it to the Active Disable position (Right Side) and then connect the ENA+ & ENA- and test again

i tested this by moving the Jumper to Active Disable and connecting the ENA+ to 5V power and ENA- to Dx-EN- but it did not work. The Motors are not energized or locked , i can roll them manually But they don't move if i send any command to move them from the console e.g

G1
G1 H2 X50
G1 H2 Y50

i also have M17 in the config.g but that did not help.

As for now, The only way the 2 x NEMA 34 Closed Loop Motors for X & Y-Axis are able to move is by disconnecting EN+ & EN- from Duet 3 6XD and the External Drivers (HSS86)

droftarts

@developeralgo222 Is this how the drives are still set?

; Drives
;Physical Drives CAN ID = 0
M569 P0.0 S0 R1 T5:5:10:10           ; X-Axis physical drive 0.0 goes forwards on CAN ID = 0 - Duet 6XD Drive 0.0 with 5us timings between pulses
M569 P0.1 S1 R1 T5:5:10:10           ; Y-Axis physical drive 0.1 goes forwards on CAN ID = 0 - Duet 6XD Drive 0.1 with 5us timings between pulses

Can you try changing the R1 to R0? Or if it is R0, change to R1. I'm not sure it will make a difference, but worth testing.

Ian

dc42

@developeralgo222 what you are aiming for is that when you boot up the Duet, the drivers are not locked (because there is a voltage across the Enable inputs of your driver, which will disable it). When you send M17 X then the voltage across the Enable pins will be removed and the X motor will lock.

If you have set the Enable jumper correctly (Active Disable sounds correct for your drivers) then you should not need to provide an R parameter in your M569 commands.

developeralgo222

@dc42 said in Configs for PCB PnP for Duet3D 6XD and 3 x 3HC expansion boards:

@developeralgo222 what you are aiming for is that when you boot up the Duet, the drivers are not locked (because there is a voltage across the Enable inputs of your driver, which will disable it). When you send M17 X then the voltage across the Enable pins will be removed and the X motor will lock.

If you have set the Enable jumper correctly (Active Disable sounds correct for your drivers) then you should not need to provide an R parameter in your M569 commands.

@dc42, now able to move both X and Y-axis. i need to sort out the endstops issue though . i used the suggestions from @droftarts about multiple endstops in parallel but it seems i am having a little bit of trouble in having them work properly

dc42

@developeralgo222 I suggest you star a separate thread for that issue. Start it by describing what doesn't work and what it does instead. Include your config.g file.