Quick update, after tuning and mounting the servo on our extruder everything runs perfectly and quietly.
I achieved to extrude almost 10kg/h of rPETG with it.

So i guess this is solved now

Quick update, after tuning and mounting the servo on our extruder everything runs perfectly and quietly.
I achieved to extrude almost 10kg/h of rPETG with it.

So i guess this is solved now

@droftarts

Thank you Ian for taking the time to help me and put me on the correct path to resolves this.

Following your insights, i have reduced the pulses per rev of the motor to 1000 pulses/rev as well as tweaking a bit some other parameters of the motor.
It looks like it's working, now that i have understand that i also have to "reboot" the motor each time i change its parameters.

I am now able to reach 4500rpm, above that the motor stalls, but i guess it will be more than sufficient for what it's meant.

Ok so today i got movement when sending gcode.

I just changed the wiring:
ena- to SI/DI3

But unfortunately i only get slow rotation of the motor about 360rpm but the motor is rated 3000rpm.

I use a planetary gearbox 20:1 so i have to get more speed.

But i am stuck again, i don't know if it's a wiring problem, as the documentation of the driver clearly states that COM+ is 12-24v and i wired it to 5v on the 1xd - (dont know where i could wire it elsewhere)
A config.g problem or even the AC servo motor configuration

here is my config for this motor:

M584 E122.0:0.4                                      	; set drive mapping extruder; 
M92 X320 Y320:320 Z640.00 E1000.00:100.00                 ; set steps per mm XYZ
M566 X300 Y300 Z60.00 E300.00:120.00                   ; set maximum instantaneous speed changes (mm/min)
M203 X12000.00 Y12000.00 Z3600.00 E18000.00:18000.00     ; set maximum speeds (mm/min)
M906 E0:1500 I30									 	; Set E motor current to 0 on XD and 800mA on driver 3
M569 P122.0 S1 R1 T1.5:1.5:1:1.5;

          					

Any help would be appreciated

Hi there,

i am currently trying to upgrade one of my printer with an T6 1000w Servo from stepperonline :
https://www.omc-stepperonline.com/fr/serie-t6-1000w-kit-de-servomoteur-ac-3000rpm-3-19nm-encodeur-17-bits-ip65-t6-rs1000h2a3-m17s

I try to wire it in differential mode to a 1xd with some infos of this topic and some other info from another topic: https://forum.duet3d.com/topic/29119/1xd-closed-loop-servo-setup/39

so from 1xd to driver:

• step+ to pul+
• step- to pul-
• dir+ to dir+
• dir- to dir-
  and that's where i am not very sure:
• 5+ to COM+
• ena+ to SI/DI3

Tried it but i still don't get any movement, how should i wire it ?

note that i was already using the 1xd with a more classic external driver and nema34 without issue but here i ma a bit stuck as AC servo drive are quite new to me.

@Zdenko

hi,

I am trying to use the same AC servo drive and motor, but i am a bit lost with the motion controller settings.
Could you let me know what's your's.
I am trying to connect this using a 1xd formelly used to run an external nema driver but i am here lost with AC servo motors.
For now it is wired in single ended mode, would you recommend differential mode ?

thanks for the help !

@p_vnct

i Have tried :

M584 E122.0:0.4
M350 E1:16 I1
M92 E14.00:100.00
M906 E0:1500 I30

Motor on external driver is working but not the second one, even if the duet report it moving.

EDIT: my bad , i just forgot to add the drive to M563... now it is working

@dc42

actually i drive a nema 34 from another Duet 6HC on another similar printer . but found that i do not use the entire torque of the nema as the Duet is "limited" to 36v and 4A.

As this Nema 34 is used for a pellet extruder, i am currently trying to drive it (on my second upgraded pellet printer) with the external driver set up at 6A-7.2A peak on 60V to see if i can achieve better flowrate and without a planetary gearbox.

For now without the planetary gearbox i cannot extrude at an acceptable flowrate with the external driver nor the drivers on the 6HC.

I'll try with a planetary gearbox like my first printer but with the external driver and see if i get better results with it.

Another thing i quickly tried but without success is to set up a second extruder motor but drived from the 6HC.
I think i don't have the right syntax for that.

Because if i map :

M584 E122.0:0.4

Then what should i set in :

M350 E??:16 I1       
M92 E??:100           
M906 E??:1000 I30    

As if i understand correctly those values are now set on the external driver ?

@dc42 Late response apologies !

M569 reports 2.7:2.7:2.7:2.7.
but when i enter this values the motor do not move anymore.

I have worked down to T4:4:4:4 and the stepper moves.

But i have a feeling that something lower the torque of the motor.
Indeed the nema 34 is rated 13Nm under 60v @ 2000steps/rev.

But i clearly do not have this torque available, what could influence the torque in the duet settings ? i guess not very much as this is related to the external driver, right ?

@dc42

About the R parameter, you are right this should matter only with the Enable wires, but with R1 and the enable wires connected it didn't work.

I used the differential wiring without the enable wires and if i go 2.5:2.5:5:0 timing values it does not work anymore.

@droftarts No i didn't !