Groupb, I'm running SD6128 on my Re-arm, they are excellent, especially when changed to fast decay. So far on the Re-arm I've tested A4988 on 1/16, TMC2100 at 1/16 interpolated, and SD6128 in 1/16, 1/32 and 1/64. The least ripple is a close match between TMC2100 and SD6128, but I think the torque on the TMC's is too low. You still get ripple on the SD's when in mixed decay, but change to fastby nebbian - Delta Machines
Quoteo_lampe If we were able to "force" the ring tree pattern and then print stuff in laywood filament, it would be a big bonus. Pretty interested to know if it could be done on a cartesian printer too? I don't think it would be easy on a cartesian, you'd have to very slightly angle the face backwards, and introduce a very slight curve into it. Not impossible, but a bit of frigging around withby nebbian - Delta Machines
Attach your config and we might be able to see what's wrong.by nebbian - Delta Machines
Hey DC, Can you please print a cube at 1/16 ustep, no interpolation, with a layer height of 0.101? I'm hoping to see that tree ring pattern on the front face. Thanks in advance.by nebbian - Delta Machines
Quotedc42 Why are you getting tree ring patterns on vertical sides of your print? I can't see any reason why you would, unless you are using a layer height that is not a whole number of microsteps, or you are using some sort of skew compensation so that the face is not quite vertical. It's on top solid infill that you can expect tree ring patterns. Thanks DC, that was it. Aliasing. Layer heighby nebbian - Delta Machines
I'm now officially puzzled. What would be causing that tree ring pattern? It has a period of about 16mm. 16MM!! That doesn't line up with anything that I can think of. It doesn't seem to change period when changing the microstepping. It does disappear when using TMC2100 drivers, although other artefacts appear, possibly related to segments (although I'm not sure about this yet). This isby nebbian - Delta Machines
btw those diagonal bands on your prints might be caused by belt teeth, they have the right period. I doubt they're anything software related.by nebbian - Delta Machines
Can you see any evidence of a tree ring pattern like this?by nebbian - Delta Machines
Thanks for that DC. 2 and 4 would be your front and back then. I've seen similar diagonal banding on my prints as well. Can you double check that you were in fact, in 1/16 mode (no interpolation)? From my experience with three different firmwares and a few different drivers, they all show the moire tree rings pattern on the front and back faces. I'd expect it to be obvious on your prints tooby nebbian - Delta Machines
Quotesungod3k With my Re-arm now working I was also looking for new drivers. there is one here the promises 1/128 step for 11,5$ I have a set, and really like them. Even at 1/16 they are better than A4988, and stronger then TMC2100. I'm going to try them at higher microsteps soon.by nebbian - General
Upon further testing, I can see a distinct moire pattern with the part printed on RE-Arm/Smoothie at 1/16 (as you'd expect), but no evidence of segments. I tried the random segment code, but it made no difference. I haven't looked hard at the code, but I'm thinking that perhaps smoothie might be doing something clever with floats and not making the microsteps line up with the segment boundariesby nebbian - Delta Machines
Quotedc42 Next, still using x16 microstepping but with interpolation disabled (this is much noisier when printing): I guess this picture is taken of the side that faces left or right, not the side that faces towards you on the build plate? I would expect to see some moire due to slow Z tower movement if this were the side facing towards the front of the machine. I just did a test with Smoby nebbian - Delta Machines
How do you handle the bit of plastic ooze on the nozzle? Do you probe hot, or snip off the filament before probing?by nebbian - General
It's a lot more accessible. You can configure it to do a few different things as well, like pause, reset, or halt, at least that's what the documentation suggests.by nebbian - General
Thanks for that DJD, much appreciated. I started digging but didn't get far enough to verify what pin it actually was on the Re-Arm. I've got pin 1.22 set in my config: panel.button_pause_pin 1.22!^ # kill/pause set one of these for the auxilliary button on viki2 but pressing it doesn't seem to do anything to the controller. Maybe I need to make a switch iby nebbian - General
It VERKS!!! Just printed my first part on the Re-Arm. Good to have that printer up and running again. I'm still yet to figure out the auto bed sense before each print though. Working on it. Has anyone figured out how to get the kill button working on the LCD panel? Or even what pin it maps to on the Re-Arm?by nebbian - General
Drill with M2.5 and tap to M3? Might be easier than other solutions. Alternatively, if you can find an M2.5 screw that fits, then you can cut the end off and dremel a flat into it, and use a flat screwdriver. Hobby shops have a multitude of small screws.by nebbian - General
I've gotta say that I agree with DC42 on this one... I think he did a valid test for the most part, at least it seems to agree with tests that I've done on a RAMPS board. The one area where it falls down in his simulation is that for his test, the segments all line up with the layer below, whereas in a time-based segment process, the segments sometimes shift for whatever reason. This all starteby nebbian - Delta Machines
QuoteOG I made this kind of a circuit and tried it and my irf540 got so f#%} HOT that I could cook sausages on it.. I had good conversation with one profesional and he said that this IRF540 is NOT a proper choise for this setup because IRF540 needs to have 10volts for gate to get fully open and ramps gives only 5 volts so it is not fully open and if you got lucky threshold voltage is 4 volts sby nebbian - Delta Machines
Quotedc42 Most firmwares divide any delta printer move other than a short one into short segments, calculate the endpoints of each segment, and generate motor steps at equal intervals within each segment, on the grounds that when a segment is small enough the difference between this approximated motion and true straight-line motion is small. Apart from the error within each segment, this forcesby nebbian - Delta Machines
Quotedrmaestro I need some info on BLTouch with Re-ARM. I have seen the servo code on Smoothiware. I'd like to know if we can use the same servo pin (1.23) for re-ARM. My BL-Touch is connected to the first (leftmost) servo connector. I assume we also have to enable Z probing, using pin 1.29 for Z min. To get the servo to work, you need to provide the centre rail on the servo ports with 5V. Theby nebbian - Controllers
A good rundown on the different sensors is here:by nebbian - General
As I suspected: Didn't take long to unsolder, hit the traces with a dremel, and solder some new jumper pins in. It's definitely a trap for young players though. And just... annoying.by nebbian - General
One major difference that swayed my decision, is whether the firmware supports different LCD panels. Last time I checked the Duet only supports the PanelDue touchscreen, which is expensive, and doesn't have a rotary knob. The Smoothie board supports many different types of panels, including ones with rotary knobs. Something else to consider.by nebbian - General
QuoteDjDemonD Its hard not to conclude here (even though my re-arm is working and print quality is good) that given some of the struggles people seem to be having: 1) if you are on a tight budget go with decent Ramps/Mega and possibly Repetier firmware for improved performance over marlin, Using some of the newer stepper driver chips and potentially 0.9 deg motors will improve your print quality.by nebbian - General
Quotedrmaestro However those random freezes and some artefacts (horizontal lines appearing on the LCD) on the LCD are some concerns. If it ever freezes during a print, I'll be going back to Mega. Nice work on getting it up and running Mine's still sitting on the bench as I work through how to get it fully functional. Regarding those horizontal lines, are you printing using the external SD caby nebbian - General
Quotedc42 Does nebbian's machine use 0.9deg motors? Yes. 0.9 degree motors, Ramps, Repetier, 1/16 microstepping, 160 steps/mm. I know that 32 bit boards are faster, there's no contest there. I did the test because many people keep repeating the myth that 8 bit boards can't move a delta fast. I think that 200 mm/s is fast enough.by nebbian - General
DrMaestro, From what I've read about the Re-arm, 1/64 should be a good starting point to balance speed and noise/accuracy.by nebbian - General
QuoteDjDemonD Okay maybe I'm being slightly pessimistic but Marlin is frequently quoted as only being able to generate 40khz step pulses from a mega/ramps board. So you're using repetier? I've little experience with it, but to do the moves you quoted that's 75khz step pulses, so that seems reasonable from what I'm told it's code is more efficient. But on a delta is a pure z move really a good teby nebbian - General