AMB Milling Motor & Duet3 MB6HC
-
@nightowl999 said in AMB Milling Motor & Duet3 MB6HC:
@fcwilt It does, but I can't use the Out9 at 24V because I've got 12V fans from Out8. I suppose I could connect the fans in series, if I needed to use 24V for the milling motor, though.
The only reason I said to use V_FUSED was that it is more or less the same as they said to use for the Duet 2. You can use the 12v setting for the Duet 3 jumper and the 24v setting on the PWM convertor.
If I am reading it correctly a 12v PWM signal should drive the PWM convertor.
It's been suggested I could use the Out9 3+2pin together as it's for a PWM/Laser/Servo connection. It's 12V, but the supply to the converter only needs to be between12-30V, but I'm just waiting confirmation on how I need to connect the header and the converter together!
I have no idea what Out 9 3+2 means.
Also, I use the two corresponding connections you've shown as the GND and VIN from the PSU, but I've got a spare pair of of OUTs!
Yes you can connect to the POWER OUT connector if you choose. I was simply trying to mirror the Duet 2 setup as best I could.
Frederick
-
Thank you, @fcwilt.
@fcwilt said in AMB Milling Motor & Duet3 MB6HC:
You can use the 12v setting for the Duet 3 jumper and the 24v setting on the PWM convertor.
Yes you can connect to the POWER OUT connector if you choose...
OK, thanks for clarifying these points for me.
The Out9 3+2pin is this bit on the Duet3:
I'm actually drawing this on a piece of paper!
-
@nightowl999
I think those connectors are just to make it easy to pick up 12v for whatever purpose and/or the normal Out 9 connection plus 5v.
The normal Out 9 connection is either going to be a 12 volt PWM signal or a V_FUSED volt PWM signal depending on the setting of the jumper previously mentioned.
Frederick
-
OK, @fcwilt. Thanks again
-
@nightowl999 said in AMB Milling Motor & Duet3 MB6HC:
OK, @fcwilt. Thanks again
Let us know how it all goes.
Frederick
-
@fcwilt Fear not, I will!
One last thing before I sink myself into a comfy chair... all the GND connectors on the Duet boards are common and connected to each other, are they not?
This might make connecting things a little easier.
-
@nightowl999 said in AMB Milling Motor & Duet3 MB6HC:
@fcwilt Fear not, I will!
One last thing before I sink myself into a comfy chair... all the GND connectors on the Duet boards are common and connected to each other, are they not?
This might make connecting things a little easier.
Yes GND is GND but they may not all have the same current carrying capacity. A GND for a power connection will likely use a wide copper trace (or two) on the PC board to carry more current. A GND for a signal connection will likely use a narrow copper trace due to lower current carrying requirements.
So choose your GND connections carefully.
Frederick
-
@fcwilt
I was thinking more about the milling motor, as the brown cable connects to the VIN of the Duet power supply pin, and there is also a link between the white cable to the GND of the converter, I was thinking it would be better to connect the brown and white directly to the PSU.Few things are more dangerous than taking the advice of someone who thinks he knows what he's doing.
I'm still on my learning curve, so take everything I say with caution!RatRig 1075, Duet3 MB6HC, Sorotec SFM 1000 PV-ER milling motor, Hobbyist
-
@nightowl999
If you mean have two wires carrying power to the Duet and another two wires carrying power to the motor - yes, that is what I would do.
I might even consider using a second power supply just for the motor. Now I don't know anything about your particular motor but some motors can generate damaging voltage spikes under certain circumstances. If a second power supply was used the Duet board would be isolated from any possible spikes.
Frederick
-
@nightowl999 said in AMB Milling Motor & Duet3 MB6HC:
I was thinking it would be better to connect the brown and white directly to the PSU.
That's pretty much hos it's explained in the pages you liked to above:
- Brown to “VIN” connector of the duet power supply pin
- White to port 5 “ voltage output – (GND)” of the pwm converter
- Connect port 5 “ voltage output – (GND)” of the pwm converter to the “GND” pin of the power supply on the duet board
There's no problem if you want to run:
- Brown to “V+” connector of the duet power supply
- White to “GND” of the duet power supply
-
In practice then, Pins 4 and 5 on the converter, the White cable on the milling motor, and the two GND pins on OUT9 2+3 cluster are all common to each other (I get the pins of OUT9 may be narrow copper strips in the PCB).
What I'll probably do is use Wago connectors as a GND and +VE bus for the relevant power supplies and go from there.
The only thing I need to be sure of is which of the OUT-9 pins I can use for the DIN+ve and DIN-ve (Ports 1 and 2) of the converter.
-
@nightowl999 said in AMB Milling Motor & Duet3 MB6HC:
The only thing I need to be sure of is which of the OUT-9 pins I can use for the DIN+ve and DIN-ve (Ports 1 and 2) of the converter.
OUT 9 only has two pins really - VOUTLC2 and OUT9. The two other connectors you mentioned previously are not relevant for your needs.
VOUTLC2 would connect to DIN+ and OUT9 would connect to DIN-.
Frederick
-
Thank you, @fcwilt.
Once again, your help and that of @alankilian is much appreciated!
All the best!
-
@nightowl999 said in AMB Milling Motor & Duet3 MB6HC:
Thank you, @fcwilt.
Once again, your help and that of @alankilian is much appreciated!
All the best!
Glad to help when I can.
Frederick
