Okay, so the problem with my delta is apparently the OrangePi Zero 3 somehow getting overloaded doing delta kinematics math that the 100mhz printer board could do fine if I put Marlin on it.

It is strangely only happening with specific directions of "diagonal" movement. I know as a delta, all directions (except straight line Z axis moves) should be pretty much the same in terms of kinematics/processor load, which is part of why this was confounding me for like a full week.

Specifically, it'll print a cube aligned with the Cartesian coordinate axes perfectly, but if I rotate it more than about 15 degrees it either loses its ability to hold the effector's Z position, or it starts drawing curvy lines while maintining Z.

It has similar problems if i try to print a cylinder, but much less pronounced.

With the current prices of Rasberry Pis, I'm really hoping I can get my hands on a used 4B since my single surviving full size RPi (i have a drawer full of zeros, but just the one RPi 5) which is currently doing triple duty as a print server, file server, and home automation host.

#3dPrinting #RaspberryPi #OrangePi #DeltaPrinter

I wound up fighting with my delta printer for three hours after I intended to go to bed.

I am baffled as to what's happening here. I've tried to start the same print several times, including re-slicing it several times, and the print is failing in completely different ways within the first few minutes of printing. The belts are correctly tensioned, and the rails are lubricated.

First it was the weird printing-in-the-air, then the filament failed, then it had some sort of kinematics issue and was printing straight lines as wavy, then it acted like it was losing steps, and then it just got stuck in some sort of loop where it kept homing over and over again and thought the print wasn't running.

When I give it single G0/G1 commands, it has no problem moving around accurately at various speeds, and if i run the bed mesh probing routine it works fine the whole time and produces a mesh that looks almost exactly like the one it's been using for the last couple weeks.

I'm about to pull the printer apart for a more modifications (enclosure, new nozzle, some changes to the effector), so i guess I'm going to test the board and the host thoroughly while i have it apart.

#3dPrinting #DeltaPrinter

The Sylph MK7 #deltaprinter #3dprinter lives again! I had to replace all the electricals but it moves, heats, extrudes, etc.

Now to finish tuning once I get it unpacked in Seattle. Was really big and heavy to get into a box

Since I've been stuck quarantining for a few days after a COVID scare, designed this.

I really like the chin horn blower concept and gives me way more airflow than other designs. For the cooker

Thinking of calling it the Balor. Will be probably my best delta effector I've ever designed.

#freecad #3dprinting #deltaprinter

Still doing stuff with design for a new printer, been busy with day job for much bigger robots so delayed 😔

Was able to figure out the necessary math for my new #deltaprinter design so you put in plate diameter in the fctsd file and it will tell you how long the lateral beams and arms you need to cut for the build, as well as making the shape files for frame and enclosure. Won't need an external calculator program

And it will work in regular freecad .21

#reprap #3dprinting

New effector for new #deltaprinter has been basic built. Still have some work.

Going to be amazing for MRRF. Shroud is printed

#3dprinting

@synack @3dprinting I think if #prusa got in on the action, it would greatly improve. #creality currently has no competition or pressure to improve, and #cura has been falling behind. If #prusa were to make a #beltprinter and it is incorporated into #prusaslicer, I would also trust it more.

Which #slicer are you using for your #deltaprinter? What is your experience with the software for deltas?