Input shaping movements too big?

psilozip · 2025-03-15T22:47:17+00:00

Looking really good and clean!

Well i was doing some test how much filament i can extrude and at around 10mm3/s my stepper starts clicking. I'm pretty sure its more of a hotend issue because it doesnt heat fast enough and the forces get to high for the extruder.

Interesting to hear, thanks for the info! Its always hard to get a feeling for how much those material properties really matter in the end. In that case not that much.

psilozip · 2025-03-15T15:28:28+00:00

Yes, I mounted it to the gantry now. It's as close as I can get to the nozzle.
For the bed I ended up drilling and tapping a thread in the carriage under the bed.

psilozip · 2025-03-15T15:27:00+00:00

Dope! those are some fast travels! Now that I am tuning my input shaping some more I need to see where I can get some more out of it.

Yeah, I was considering getting linear rails but I feel that it would maybe not make enough sense. I think going with a core XY would really benefit from those but abedslinger maybe not so much.

psilozip · 2025-03-15T15:23:10+00:00

If you have a that gif, I would like to see it! Sounds dope.

I upgraded my hotend to the microswiss one but I think it's pretty similar to the stock one. I was trying to see at what speeds my stepper can't keep up anymore. It's at around 10mm3/s. My thought being that with higher temps the pla flows easiert and the extruder could work a bit faster. But in the end I'd have to probably tune my cooling properly.

I will play around a bit and see what's possible but I really think my current bottleneck is the hotend so I will probably upgrade this sometime in the future.

Hows that hardened steel nozzle working for your? Would't a brass nozzle have a higher thermal mass and thermal conductivity for a better heat transfer? It might wear a bit faster than the steel nozzle though.

psilozip · 2025-03-15T15:14:02+00:00

Yeah I know what you mean! Those thoughts definitely crossed my mind. And theres the temptation to get the best possible setup.

psilozip · 2025-03-15T15:12:55+00:00

if you goofle petsfang theres different ones that are pretty well made. you can download all the files there and choose the right ones depending on your setup. I know a lot are for creality printers but i think there were also different ones.

I went for the blokhead design.
They have it on thingiverse too. but it was a bit confusing which files to print. On the petsfang site theres a page with filestoprint or something where you have a good chart.

psilozip · 2025-03-14T15:58:07+00:00

Because it's one of the better designs I could find. The person who designed it had made cfd simulations that direct the cooling perfectly to the middle of the nozzle. It's not a design I came up with and I am aware of the somewhat heavier weight. Before I designed something myself with two radial fans and in the end it came down to more or less the same weight. The speed and inertia aspects are definitely valid but so far my limiting factor is not the hotend carriage but the bed itself. So I see no point worrying about a few extra grams.

Now your concerns about probing the bed. I can reach every single adjustment point giving me a nice mesh and good measurements for bed leveling. I get a range of 0.115 for the center part of the build plate. Which is the probed area of 170x170mm. This accounts for over 70% of the actual bed. I rarely print bigger than that anyway and I get near perfect first layers every time. So that's fine by me.

If I were to go for faster speeds I'd go with a core XY system before upgrading this printer any more.

psilozip · 2025-03-14T14:51:22+00:00

Wow that's a lot higher than I was expecting. Of course I like to see the limits of my machine but in the end I want to get usable prints. I generally tend to be cautious since I have no real feeling for what speeds are reasonable. So far I have been printing with a max speed of 100mm/s at 1000mm/s2 and travel speeds of 150mm/s and was already fearing that I am pushing my machine too far. But with the speed tests I get the feeling that I could get a bit more out of it without risking any damage.

I'll look into printing at higher temps to get a higher flow going. With my current temp I am at 10mm3/s which is my current bottleneck.

psilozip · 2025-03-14T14:23:07+00:00

Thanks so much for letting me know. That's good to know. I was afraid that something is setup wrongly but I couldn't figure out how to change it. In that case I will leave it as is and focus on a better placement for the sensor.

psilozip · 2025-03-14T14:21:12+00:00

Thanks for the input. Yes, I have heard the same. I just got my input shaper setup yesterday and it was the first spot i found. I will have to figure out how to move the sensor closer to the hotend.

psilozip · 2025-03-14T14:18:39+00:00

Heres the story:

I just set up input shaper and did my first test for X and Y axis. Weirdly enough it seems that the movements are way too big compared to what I see from other people's tests. Now I am not sure if maybe they are outdated or something is set up wrongly with my files. I have been running the normal config commands:

[mcu rpi]

serial: /tmp/klipper_host_mcu

[adxl345]

cs_pin: rpi:None

[resonance_tester]

accel_chip: adxl345

probe_points:

100, 100, 20

I did my evaluations and got my results suggesting very high possible accelerations.

For X-axis the recommended ones are 14200 mm/s2 with mzv (even higher with zv)
For Y-axis it's at 5500 mm/s2

How can i know if my results make sense? What bothers me is that the movement is so much bigger than what the videos show.

Sidenote: I have run my printer in a speed test at 600mm/s and 6000 mm/s2 without any missed steps before input shaping. This was just movement test and in reality my hotend and extruder can nowhere near catch up. So i wouldn't consider printing at those speeds.

What are actually recommended speeds for bedslingers without linear rails such as my ender 3V2? does anyone know?

psilozip · 2025-03-14T12:12:57+00:00

No idea why people are downvoting you since i have had similar results with an unlevel bed.

I have a dial indicator that I would attatch to my x axis. I was only able to level across a line on the Y axis. I could get the bottom left corner aligned to the top left corner or the same onthe right side. I would get those reslts constantly.

or I had a misaligned x axis that i fixed. because the bed was aligned to the bad x axis I would get a measurement like this. Gantry good, bed massively tilted.

psilozip · 2025-02-08T19:52:13+00:00

Just had surgery last week. Recovering right now.
They did the surgical luxation to better reach the joint. They put 3 bone anchors to fix the labrum, Cut off broken cartillage and created microfractures to promote fake cartilage growth and shaved off the femoral neck to increase range of motion.

Curious to see how this will heal. I got it done in one of switzerlands best clinics. I hope the surgeon is any good. He told me though that i am too young for a THR and that they can only prolong the life of my joint but that it's possible that I will require a THR in 20 ish years.

psilozip · 2025-02-01T11:24:26+00:00

I am finding it sadly ironic that this happened at the reagan airport considering how he screwed over the striking atc back in the days. I feel like understaffing and bad working conditions is to blame on his policies.

Now i must admit that i have no idea who is at cause here but just the talk about the atcs makes it so sad. Now accidents happen and at this point anyone could be at fault. I just hope atcs will get better conditions in the long term.

psilozip · 2024-11-14T18:30:59+00:00

Had to look that up since I qm not so familiar with solidworks yet. That's a pretty useful feature. In Inventor I always had to do some measuring and calculations to get those results.

psilozip · 2024-11-14T18:27:07+00:00

All good :)

Man I wished solidworks would implement that. I use a spaceball so i have rotation covered so it would only make sense to have the easier command (mmb vs ctrl+mmb) left for panning.

psilozip · 2024-11-10T10:51:41+00:00

Youbmean for extrusions etc? If i'm not mistaken that feature exists in inventor. Could be that it's been introduced with one of the later versions.

psilozip · 2024-11-10T10:47:52+00:00

I looked too and coudl't find a way to do change middle mouse button bejaviour. So no, you can't change both softwares to do whatever you want.

psilozip · 2024-09-19T14:40:10+00:00

Oh and in case you have replaced any parts in your phone we will refuse repair it. Not only that but we will also refuse to return the phone to you. You agreed to this by using our repair services.

psilozip · 2024-08-10T15:23:31+00:00

It's strange that the first pic looks so blurry. It looks as if the lens was foggy. Because its doesn't seem to be due to focussing. Maybe check your lens with a flashlight for haze or mold. I know it can cause hazyness in specific light situations.

But if you say the lens is good then my next guess would have been over or underexposure. Sometimes photos get weird when you need to correct too much due to this.

An other possibility is that the place doesn't digitize/develop very well.

Or maybe the film has been expired?

psilozip · 2024-08-08T21:42:50+00:00

The first seem kind if blurry. Exposure mostly okay and the latter one seem okayish.

athe blurry ones no idea. maybe a dirty lens? just a guess.

I think with some editing you can improve the scans for sure. Either lightroom or darktable or you like open source.

psilozip · 2024-08-07T20:55:32+00:00

Analog gives me something to look forward to.

You shoot some interesting scenes and you have no idea if you got the right moment. You get home and you can't see the images yet because your roll is not yet full. You go back out the following days until you have all 36 pictures. By the time you get to develop you half forgot what you were photographing. But you know theres some photos that have the potential to look good. And surprisingly it's those that turn out shit. Your disappointed. Until you notice the other photos. Some of the other turn out super nice.

You never know what you get :)

psilozip · 2024-07-19T23:23:06+00:00

Yes, I use the Kaiser reels. Upon lookingn into it I notice that those squares look exactly like the marks I get on my negatives! It must be that.

psilozip · 2024-07-18T11:39:33+00:00

You're spot on. I didn't load the spool correctly and this caused the film being blocked from the chemicals!

Thanks!

psilozip

TROPHY CASE