Jammed some paper in between the looser end on the worm gear and the bearing and it seems to have helped. I have ordered a new nimble (as they have a slightly improved version now) so maybe I need to get a replacement worm gear? I will have to measure it first and see if it was manufactured incorrectly.
@damianm reducing the extruder acceleration to 1000 did wonders to be honest. I will have to check a few other slicer settings and esteps to see if I can improve on the finish I am currently getting.
It's good but now as good as I got from it on my previous printer.
Spoke quickly to Brian from Zesty Tech over email. He suggested a few things which have improved the quality but still not quite there 100%. May be having a call with him tomorrow.
One thing I have mentioned to him though, the worm gear seems much looser in the bearing on one end, I am not sure if this is intentional but may be an issue?
If anyone can suggest anything to improve this result further I am all ears....
@phaedrux diagonals, yes, circles no.
With the nimble what could actually cause that eccentricity?
@phaedrux extruder eccentricity? Never heard that term before? Could you give me a quick run down on it?
@alexander-mundy I have contacted the guys at zesty earlier today and await their reply.
Config below:
; Configuration file for S.H.I.E.L.D. Printer (by James Lawes)
;Date Mofidied: 03-2-19
; Communication and General
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves
M667 S1 ; Switch to CoreXY mode
M111 S0 ; Debugging off
G21 ; Work in millimetres
M555 P2 ; Set firmware compatibility to look like Marlin
; WIFI
M550 PSHIELD ; Set machine name
M540 P0x60:0x01:0x94:0x0C:0x54:0x28 ; set MAC address
M552 S1 ; Enable network and acquire dynamic address via DHCP
M554 P192.168.1.1 ; Set gateway
; *** PanelDue Touch Display
M575 P1 B57600 S1 ; Assign serial channel #1 (P1)
; Set baud to 57.6k and only accept commands
; valid with checksum (parameter S1)
; Drives
M569 P0 S0 ; X Motor runs forwards
M569 P1 S0 ; Y Motor runs forwards
M569 P2 S1 ; Z Motor runs forwards
M569 P4 S1 ; E Motor runs forwards
; Movement
M906 X800 Y800 Z800 E600 I60 ; Set motor currents (mA) and motor idle factor in per cent (tweaked for motor temps)
M201 X4000 Y4000 Z12 E240 ; Set accelerations (mm/s^2)
M203 X8000 Y8000 Z240 E2750 ; Set maximum speeds (mm/min)
M566 X400 Y400 Z20 E30 ; Set maximum instantaneous speed changes (mm/min)
M84 S30 ; Set idle timeout
; Stepping
M350 X64 Y64 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X320 Y320 Z400 E2820 ; Set steps per mm
; Pressure Advance
;M572 D0 S0.7
; Axis Limits
M208 X-15 Y-10 Z0 S1 ; Set axis minima
M208 X315 Y290 Z300 S0 ; Set axis maxima
; Endstops
M574 X1 Y2 S1 ; Define active high microswitches
; Z-Probe
M574 Z1 S2 ; Set endstops controlled by probe
M307 H3 A-1 C-1 D-1 ; Disable heater on PWM channel for BLTouch
M558 P9 H5 F120 T6000 ; Set Z probe type to bltouch and the dive height + speeds
G31 P500 X0 Y0 Z1.6 ; Set Z probe trigger value, offset and trigger height
M557 X40:280 Y40:280 S55 ; Define mesh grid
; Heaters
M307 H0 B0 S1.00 ; Disable bang-bang mode for the bed heater and set PWM limit
M305 P0 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 0
M143 H0 S110 ; Set temperature limit for heater 0 to 120C
M305 P1 X501 R4700 ; Configure PT1000 for heater 1
M307 H1 A505.6 C174.5 D6.6 S1.00 V24.3 B0
M143 H1 S290 ; Set temperature limit for heater 1 to 280C
; Fans
M106 P0 S1 I0 F500 H1 T40 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P1 S0 I0 F100 H-1 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
; Tools
M563 P0 D0 H1 F1 ; Define Tool 0
G10 P0 X0 Y0 Z0 ; Set tool 0 axis offsets
G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C
M572 D0 S0.03
M564 H0
M501
T0
Yes, I have. It's all nice and smooth it just seems a bit inconsistent when extruding. Apparently from some digging in several forums you can add 15k diff fluid as a lubricant on the nimble which apparently helps?
I have built a corexy printer based on the hypercube. All gates idlers, pulleys and belts.
I cannot get rid of this weird texture!
I have tried upping and lowering currents, rebuilding and cleaning the hotend (v6) and liner rails, printing faster, printing slower, adjusting jerk, acceleration and max speed, calibrated the esteps a few times, changing filament, PID tuning, praying to the beard of Zues, however no luck.
@deckingman Without a massive change to the placement of pulleys and such it's unfortunately not possible.
@fcwilt Having a think about it, the E3D design uses the fabtotum style corexy which places the belts in front and behind the x carriage. It is technically possible to move them both behind the carriage, would that help?