Spindle nema 34 duet 2 wifi

[o_lampe]

@jay_s_uk
Worst case would be cancelling the job. "Cutting a thread" is not too forgiving in terms of skipped steps.

[dc42]

Will a stepper motor provide sufficient speed and torque? Stepper motors are limited to a few revs/second due to back emf.

[jay_s_uk]

@dc42 i have my doubts whether it would

[CNCModeller]

@dc42 said in Spindle nema 34 duet 2 wifi:

@paolozampini1973 @CNCModeller if there is enough interest then I can look at providing the option to run a stepper motor as a spindle in a future version of RRF. However, it's likely to be a Duet 3 feature only because of lack of flash memory on Duet 2.

@dc42 I'm just speculating on solutions for both threading on a lathe and rigid tapping on a mill. So specifically using a stepper as a spindle drive is just one option.

The potential to do limited milling on a lathe using a cross slide mounted milling head with the lathe axis as a rotary would also improve workflow.

I'm not sure if any of this would impact performance on my polar printer, especially since I'm using the 1HCL on that axis anyway.

In terms of solutions I'm open, just interested in this as one option.

[dc42]

@CNCModeller threading and tapping should already be possible, just configure it as a rotary axis.

[paolozampini1973]

@dc42 @CNCModeller @jay_s_uk
a stepper motor can reach 3200 RPM WITHOUT step loss tests done by me personally (nema 17 , 23 , 34 ) and as we know the advantage is the maximum torque at under 500 - 800 rpm and working on the export of materials at low speed leads only advantages because:

1. the metal heats up little
2. vibrations are very low
3. high precision
4. for most of the processes it requires very little lubrication and for other processes there is no need to lubricate
5. working plastic parts at 200 RPM they work very well having a high torque
   VFD motors WORK from 0-22000 RPM i ne or 2 types example: a 3kw at 50 Newton +or- and a 1,5kw disadvantages:
6. high current draw
7. below 1000 rpm very low torque and does not allow to do some machining especially at 200 RPM
8. it takes a lot of lubrication I'LL STOP HERE BECAUSE THERE'S SO MUCH MORE TO SAY ABOUT THE DISADVANTAGES
   I CLOSE BY SAYING THAT THE LOW SPEED IS THE BEST IN THE END EVEN IF THE PROCESSING TIMES LONGER

OR I READ THAT THERE ARE NUMEROUS PEOPLE INTERESTED
I ASK TO ADD TO @DC42 THE FOLLOWING FUNCTIONSIN DUET 2 WIFI, IN ME THE MOST SUITABLE:
MILL :

1. AXIS FOR CONTINUOUS USE MILLING (ROTATIVE) WHICH HAS THE SAME FUNCTION AS THE VFD
   LATHE:
2. A OR B OR C AXIS FOR THREADING AND TURNING
   I'M SORRY IF I WAS LITTLE SYNTHETIC IN THE EXPLANATIONS AND THANK YOU EVERYONE FOR PARTICIPATING
   @DC42 I WOULD LIKE TO HELP

[paolozampini1973]

@dc42 said in Spindle nema 34 duet 2 wifi:

Will a stepper motor provide sufficient speed and torque? Stepper motors are limited to a few revs/second due to back emf.

the stepper motor provides high torque at low revs which the vfd motor does not and this brings many advantages for my experience that I have done some technical tests

[paolozampini1973]

@dc42 said in Spindle nema 34 duet 2 wifi:

@paolozampini1973 @CNCModeller if there is enough interest then I can look at providing the option to run a stepper motor as a spindle in a future version of RRF. However, it's likely to be a Duet 3 feature only because of lack of flash memory on Duet 2.

reading on the forum I saw that there are people particularly interested in the DUET 2 WiFi As for removing plastics with a cutter, I have a lot of experience and also with turning, over time I have understood that high speed has many disadvantages It is better to work at low speed with some strategies you can achieve excellent results without lengthening the times excessively

[oliof]

@paolozampini1973 Duet2Wifi will not be able to fit new features due to space constraints.

[paolozampini1973]

@oliof said in Spindle nema 34 duet 2 wifi:

@paolozampini1973 Duet2Wifi will not be able to fit new features due to space constraints.

thanks for the answer can it be clearer please Thanks

[Nightowl]

@paolozampini1973
I think what that means is the memory within the Duet2 doesn't have adequate capacity to store the additional code required.