I found this which is partway: & Seems conceptually it's a maybe-thing in CNC world, but I haven't found any reprap discussions about it. Probably because it's mostly implemented in firmware usually, and this CNC stuff is too to a degree, but I like the idea of having a host that controls things. Seems some functions would be hard to make it exclusively host-controlled.by Tomek - Experimental
So I have thought a few times that I wanted to make gcode that had conditional statements, math, and/or just variable infill in it. For example, with respect to the latter, something like ; $PARK = 200 ; in gcode, and in the gcode file a bunch of G1 X$PARK commands. Same thing for temperatures. While this can be sort of done with firmware support, e.g, ultimaker stuff and some of the old makeby Tomek - Experimental
:-)! Still making progress on the board I'm converting, and have a better sense of what's going on with the klipper code. Thank you, for what looks like a pretty small crew for this project (you + seems small bits from other people so far - nominally seems pretty much you) this is relatively much better documented than other things I've looked at. Wherever you have added notes about intent, codeby Tomek - Firmware - experimental, borrowed, and future
Hmm, thanks Kevin for the response! I will think about it, perhaps the atmega 8-bit line will work out OK for me, with future upgrading to something faster/modern. I know I should try the Due if it's sorta-tested, and could benefit from more testing, but I am also leaving this printer with my more mechanically-not-software inclined father and may have a harder time troubleshooting odd issues, ifby Tomek - Firmware - experimental, borrowed, and future
Does anyone recommend a particular platform for the MCU side of things? I am interested in TMC2260 all around, so thought the Azteeg smoothieboard that can do that from Panucatt would be great. I have not confirmed yet whether Klipper supports that processor, of it there are better options. It seems according to devs "todo" it is not an option yet. I may have overlooked it, but is there a lisby Tomek - Firmware - experimental, borrowed, and future
Quotedc42 Arthur's replies to my own in this thread caused me to pause for thought and prompted me to run some tests. As this has drifted seriously off-topic, I've started a new thread here . @LoboCNC, in a 3D printer there is a big difference in the noise level when you switch from x16 to x256 microstepping. In other applications such as CNC machines, the reduction in noise may not be significaby Tomek - General
Quotedc42 Arthur's replies to my own in this thread caused me to pause for thought and prompted me to run some tests. As this has drifted seriously off-topic, I've started a new thread here . @LoboCNC, in a 3D printer there is a big difference in the noise level when you switch from x16 to x256 microstepping. In other applications such as CNC machines, the reduction in noise may not be significaby Tomek - General
If anyone else is looking...I ended up biting the bullet and finding a few suppliers on aliexpress. We'll see if that works out. I also found a single seller on ebay, when I stored for "steel cord gt2" instead of "steel core gt2" For some reason the steel stuff ends up being with polyurethane instead of (what I think the regular fiberglass belt uses) neoprene. I'll run a couple tests till faby Tomek - Wanted
Hi, I'm planning on putting my belt under higher tension than is typical. Does anyone have or know where to source higher quality GT2 belt? I went through the entire wiki on belts, and T2.5 has a couple german sources for steel core, but GT2 is only neoprene/fiberglass everywhere I look. Sources, leads, feedback, etc, anything would be appreciated. I'm not having any luck at all! Regards, -Tomby Tomek - Wanted
Nono, I haven't been clear; I'm sorry I'm not asking that much as to get into the bearing side. In the first post photos, you are pinching the shaft at the point of the pulley, to show the fracture break. The point where you are pinching, is where I'm looking to see if it's soft or not. Not anything internal to the motor.by Tomek - Mechanics
Did you have a chance to check out the other end of the shaft, like where the pulley is on? So the shaft you've just tested gives you a baseline from which you can tell if the other end of the shaft is much softer or the same/similar. My reasoning being is that the shaft is almost certainly hardened. It broke in a clean fracture, and it also probably broke after a lot of repeated motions so itby Tomek - Mechanics
I didn't read other replies closely (apologizes) but you said leadscrew is connected to Z motor by a flex coupler. surprisingly I think actually the vinyl tubing uber-cheap couplers are better than the aluminum flex couplers. If you look at the flex couplers you realize they're springs, and so they introduce Z-movement up and down when twisting. Vinyl tubing offers some bend-ability for axial mby Tomek - Mechanics
I looked into the micro-steppers, you can get those for $4-5 plus basic $1-3 driver, so it's doable but maybe not worth the effort. I was looking into making a big printer at which point I might do auto-leveling just because I need two z-motors anyway if I go to 3 I might save some effort. But much of the benefits of auto-leveling could be achieved with just the sensor. Imagine instead of plaby Tomek - Mechanics
Do you mind running a file on the shaft as mentioned earlier? But actually the key curiosity is to run near where it was broken, and also on the other end of the shaft where unbroken. If neither side bite with the file, then they are both hardened, and the shaft came hardened to you. If the break side doesn't bite, but the other side bites, then the metal came to you and was soft but because harby Tomek - Mechanics
Thanks John! Your work is great. I ended up printing out richards parts and drilling out the holes . The area there was a little stronger than I expected, though I do worry it might be weakened and not ideal. In fact, for sake of complete disclosure, I didnt have an 8mm drill and went a little under (using a very bad caliper I got something like 7.87mm for that random drill bit, and heated up myby Tomek - Delta Machines
Hi John, I can't seem to find your files on github that include the "full" size pieces in the original 3DR style. What I mean is that I see one "full" motor mount, but it does not have the indents for the center triangle. Is there any chance you have the file up? I tried to follow the suggestion to look up the github history, but I didn't seem to find older versions than the one you have 3 moby Tomek - Delta Machines
Sorry, I don't know how far it would be off (I have a lot of leeway on my install and it's just 1 rod for the Z-axis of a cartesian bot.)by Tomek - Delta Machines
Thanks for the two responses with the extended 3DR files ! (and richard for the most recent 3dr update)by Tomek - Delta Machines
Did the guy who made the 3DR "extensions" for a bigger build platform release his files? I was having trouble finding them.by Tomek - Delta Machines
I imagine this design, coupled with the "threadless ballscrew" could be great (e.g, , I just pulled the first one I found its not the best.) Way to take what first sounds like a bad idea (threadscrews) and turning into a feasible lowcost design. Props!by Tomek - Delta Machines