A level standard of education- studied physics, pure and applied mathematics, chemistry and Engineering. I have been in the Machining business for the past 30 years or so. Wire eroders, 5 axis wire cut, 5 axis turning and 4 axis milling centers.. All Self taught - but Year ago interested myself in 3d printing. Bought a Prusa kit which was mediocre and I built it in metal and has 4 extruders. It cost a bomb to do.. then I decided to build a large 350 x 350 3d printer... nearly done and its all metal cnc machined.
Was intended for Ramps but now will go for the duet.
I intend driving into the 3d printing entirely, producing high end printers. Duet seems to be the best option around.
I intend to build a single, dual, color mixing and a multicolor type. The printer has Hywin guides for all axis and now looking at possibility to modify my printer go for balls-crews as an option, closed filament.
I have a duet wifi board and wish to get some advise about the best bed calibration. Currently have an adjustable precision aluminium plate heated with a 220V silicone pad with a glass plate. As the printer is fully encased, the manual adjustment is difficult to tweak. What is the best option (not necessarily the cheapest) Which is the best probe around easily adaptable to my duet wifi?
many thanks all who put an imput. Its appreciated a lot. Have a nice weekend.
@alankilian
Thanks again my friend... I found out that the ground wire was a bit short and I pulled it out from the ferrule of the connector...
@Phaedrux
I wish to clarify some thing about my printer.
I have set the power to 1000. The Belts are not tight. Just tight enough.
just to indicate my level of understanding on the matter, I own and run a CNC machine shop with various Vertical machining and turning centers/eroders/wire cut machines, programming and servicing for around 35 years.
This printer is one of two prototypes I designed and manufactured and spent much time with it. I wish to maybe market in the future. It is made entirely of metal,
This particular 3D printer runs reciprocating ball slides in X,Y and Z and I am prototyping running X and Y with reciprocating ball 12mm bal-lscrews. It has water cooling, twin extruders, and fully enclosed. Running it with a Duet is certainly a fitting suitable option.
The motors have to rotate faster and more with the balls-crews but certainly much stronger.
Yes the heat bed is a bit heavy as it is made from a 6mm machined frame and the bed is around 400 x 400 mm with a 3 mm borosilicate glass.
The extruders are custom made with a 1:3 reduction gearbox- spent around a year developing them.
The bottom line...
Now when I home- if I home at F100, the homing is smooth. Even movement is smooth, however on increasing the feed, like F500, there is noise and the motors vibrate... If I increase the feed like F1000, the motors will simply vibrate and whine and do not move.
I am thinking of switching to 24V and maybe go for the nema x 60mm larger motors. I can`t easily switch to an other type as it will involve extensive modifciations.
many thanks for your feedback.
Coming to ,
managed to run the extruders now. Apparently, I edited the config as per suggestion on a forum.. don not know if it was this or any other honestly since I had found it days ago and screen shot it out, But the extruders are running nicely by command..
@dc42
you were absolutely right in this as the sensors were thermistors. The resistance was 118 Ohms. Thermocouples do not have any or infinity. I was really misguided. I connected everything and tested and the temperatures showing are actual off by 1-2 degrees.
My profound apologies for the din I created but I am sure I have learnt something else.
many thanks to everybody who lent a hand.
@dc42
took off that comment and the error vanished... thanks so much
the matter is closed..
When will this feature be introduced? I intend to use a Duet to run a cnc lathe but ballscrews do need to be backlash compensated. It was mentioned that this feature was on to do list but with such a well designed board without such a feature its a real pity....
@jay_s_uk
Thanks, my printer runs with reciprocating ballscrews and Z being not so heavy I am not happy with.
Marlin has M425 for backlash compensation. I have not seen anything like in Duet Firmware. Maybe I am missing something?
G91 ;realtive mode
G1 Z275 F1000 H1 ; move Z rapidly / 300mm up/ until Homing is triggered - the 275 is larger than the stroke.
G90 ;absolute mode
G1 Z256 F10 ; retract z 3mm slowly (Z 259 reaches the microswitch) so it backs off 3mm)
G91 ;realtive mode
G1 Z5 F0.1 H1 ; rehome at slow speed (then home very slowly)
G90 ; return to asoute mode
G1 Z261 ; back off (this goes down a bit away from the switch)
@jay_s_uk
you are right... it could be put in the slicer start script but I think even in the Z homing script. I have read that to put in the homing script you must be using the G30 commands but my z homing scripts are different...
;Z homing Script
G91 ;realtive mode
G1 Z275 F1000 H1 ; move Z rapidly / 300mm up/ until Homing is triggerd
G90 ;absolute mode
G1 Z256 F10 ; retract z 3mm slowly
G91 ;realtive mode
G1 Z5 F0.1 H1 ; rehome at slow speed
G90 ; return to asoute mode
G1 Z261 ; back off
@jay_s_uk
obviously the printer would be fully calibrated, nozzle adjusted and ready to go....
I can put it in the slicer start script but would prefer to put it in config when the printer starts...
@jay_s_uk
can this be placed in config.g file and read when the printer starts?
I have set my printer to do bed mapping through a macro. It does not feature in the config.g file.
I have the file heightmap.csv in the systems file group.
the idea is to get the printer do bed mapping when actually required.
my question is how to get the printer to load and use the heightmap csv .
I have come across a bed file as well.
Any help appreciated.
@jay_s_uk
Thanks for the clarification.