Posts made by flopes

@droftarts Thank you very much

@flopes

Hi guys
I changed the units on my laser cutter from mm to microns, once I am cutting very small parts.
The system behaves well when running g-codes. However when jogging from the web interface, I reach a speed limit of about 1000 microns per minute (do not know exactly). The speeds and accelerations are set to go much faster than that and on G-code they run just fine. How can I increase the maximum speed at jog interface?!

@jay_s_uk thats awesome. impressive fast response. thank you

Hi
I have a laser cutter on duet2wifi, 3.4.5 firmware. It also has a panel Due connected.
It is machining very critical parts and the printer does drift in position over temperature. I would like to pause the cutter when the room is too hot or too cold and resume cutting when temperature is back to normal (controlling it at 26C +/- 0.3 degrees).
I can generate an error signal from the room temperature controller.
How do you advise me to connect duet2?
Thanks

@flopes or pwm?

@jay_s_uk Thanks
What about producing a 0-10V output, specified at tool definition?

I am making a small lathe and using a stepper motor as spindle. I am using the Duet2 wifi running Duet Web 3.4.6.
How can I control the rpm of the motor in such a way it stays spinning until commanded to stop?

Thanks

@jay_s_uk Should I put M203i only?

@jay_s_uk I set M203I0,
my limit is 0.5mm/min and not 0.5mm/s

Hi
I have a laser cutter and need to run about 0.1mm/min for some micromachining operation.
I have a Duet2-Wifi on Beta 3.5.0
I have set the minimum axis speed to 0
When trying to go slower, even reducing the speed on %cutting speed, it does not go slower. I have been cheating, changing the axis scale, but I would prefere not doing that, because it messes the other production jobs.
Any suggestions?
Thanks

Do you suggest a BLDC &encoder driver for me to build a large laser cutter?
The motor should spin at about 100Hz and 1k ticks encoder
It seems the ODrive is not an option, according to some postings here
Thanks

@ELAD . Is it working properly? I am designing a laser cutter with the ODRIVEs. Please let me know

@flopes do you have a nice way to attach an analog joystick to the duet 3d?

@Phaedrux Solved. Thanks

Hi. I am trying to config the 4th axis as A on the 4th driver of the Duet2 Wifi. Now the motor is installed but I cannot home the drive, since it has no home sensor.
Please help.
Thanks.
I am runing the 3.3 firmware. This is a copy of my config.
; General preferences
M575 P1 S1 B57600 ; enable support for PanelDue
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Laser Cutter" ; set printer name

; BOARD SETUP

M452 ; cnc mode
M950S2C"EXP.HEATER3" ;Set blower on P2/Heater3
M950P3C"EXP.HEATER4" ; set Shutter on P3/Heater4
M950P4C"EXP.HEATER5" ; set "Laser Off" on P4/Heater5
M280P2S1000 ; set blower "off" to enable it
M42P3S255 ; turn Shutter off
M42P4S255 ; turn Laser Power on
M203I0 ; set min axis speeds to 0

; ROTARY AXIS
M584 A3 R1S1 ;set A axis as rotary

; Network
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet

; Drives
M569 P0 S1 ; physical drive 0 goes forwards
M569 P1 S0 ; physical drive 1 goes backwards
M569 P2 S1 ; physical drive 2 goes forwards
M569 P3 S1 ; physical drive 3 goes forwards
M584 X0 Y1 Z2 A3 ; set drive mapping
M350 X8 Y8 Z8 A8 I0 ; configure microstepping without interpolation
M92 X1600.00 Y1600.00 Z1600.00 A4.44 ; set steps per mm
M566 X180.00 Y180.00 Z180.00 A180.00 ; set maximum instantaneous speed changes (mm/min)
M203 X600.00 Y600.00 Z600.00 A43200.00 ; set maximum speeds (mm/min)
M201 X10.00 Y10.00 Z10.00 A100.00 ; set accelerations (mm/s^2)
M906 X1000 Y1000 Z1000 A300 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S1 ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z-60 S1 ; set axis minima
M208 X110 Y110 Z41.5 S0

@dc42 Hello. The Beta 3.5.0 with segments of 0.02 is sufficient for my aplication at the moment.
We build this custom laser printer cut brain implants and the programs are quite long - 10's of thousands arcs connected together. Usually takes 3 days to cut one batch. During these last 6 motnhs we come up with a series of methods to minimize the offset in position from the first features cut to the last ones. We figured out there is no more mechanical possibilities for this offset to be happening. We even added temperature control on the whole printer.

I believe there may be some rounding going on in the system. We also notice this offset is larger on y axis.

Do you believe we could benefit from adding encoders to the Nema17 stepper motors?
by the way we use 1600steps/mm
Thanks

@dc42 Thank you. I will give that a try. that is 5x improvement.

@flopes
short answer = 1600steps/mm

@droftarts Board: Duet 2 WiFi (2WiFi)
Firmware: RepRapFirmware for Duet 2 WiFi/Ethernet 3.4.4 (2022-10-20)
Duet WiFi Server Version: 1.27