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My son is struggling in his geometry/trig class. He has a solid grasp of the material, but is struggling with the minutea of turning things in on time. I'm concerned that his miserable experience in class is going to turn him off from his engineering interests. I thought it may be fun to build a robot project with him.

I would like to build / program a swing-arm drawbot with him and have him define the inverse kinematics of the motion. I can't find a ready designed project. What is something like this called?

I live in Austin, TX.

I recently hired a licensed and insured painting company to repaint the interior of my house (ceilings, walls, and trim). For the most part, I am happy with what they have done. However, recently I have noticed that the paint on the trim isn't adhering well.

I have been speaking with the painter. He ran his fingernails along the front of a door to prove that the paint had bonded. His fingernails came away clean and there was no damage to the paint on the door. However, I at one point ran into a door with my laundry basket and some paint fell off. He wants to treat this as a touch up job where I point out all of the places with defects. I'm concerned that the trim pain

I live in Austin, TX.
I recently hired a licensed and insured painting company to repaint the interior of my house (ceilings, walls, and trim). For the most part, I am happy with what they have done. However, recently I have noticed that the paint on the trim isn't adhering well.

I have been speaking with the painter. He ran his fingernails along the front of a door to proved that the paint had bonded. His fingernails came away clean and there was no damage to the paint on the door. However, I at one point ran into a door with my laundry basket and some paint fell off. He wants to treat this as a touch up job where I point out all of the places with defects. I'm concerned that the t

I'm using chrome on mac os.

I have no idea what the problem is. Everything works fine when I open the page in incognito mode or safari. I've cleared cache and hard reloaded and cleared all cookie, but the problem persists when I'm using my regular browser. Any ideas what is wrong?

I don't get it. I printed something out yesterday. Today, I'm getting z axis calibration issues every time the MBL tries to detect the front right corner.

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The only thing I changed is printing petg to PLA. Does anyone else have problems like this? Any solutions?

My 11 yo and I are building a word clock to teach him about programming. I thought I'd help him out by writing a quick module that will return ntptime corrected for our timezone and daylight savings time. I would like it to sync with the servers periodically, but the code I wrote for that is giving me fits.

import time
import ntptime

nextSync = 0

# nunber of seconds between syncing with npt server
syncInterval = 3600

cstOffset = -6

def gettime():
    if time.time() > nextSync:
        ntptime.settime()
        nextSync = time.time() + syncInterval

    offset = cstOffset
    if isDST():
        offset += 1

This print failed with crash detection. The inner portion of the print should be the top layer of a container. Most of it is smooth as it should be, but the top left got rough and bumpy for some reason and caused the crash. I checked, there is no warping off of the plate on the back. I'm out of ideas on what could be causing this.

link

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Prusa mk3

Sunlu pla+
.8mm nozzle
.4 layer height
220 / 215 nozzle

30mm/s top solid infill

I kept getting phantom crash detections on my x-axis. I traced the issue down to the lower x-axis bearing, one of the races is frozen.

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I guess its time to replace them - where can I get good bearings? Links appreciated.

sorry for the dad joke....

Here's the album

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I'm using Enotepad abs - recommended print temp is 220 - 240.

Nozzle: 240 first, 230after

Bed: 95

5% infill

no cooling fan

Prusa mk3 in an enclosure.

What is up with the edges bending in like that?

I've done the nyloc mod and I'm using the 7x7. Prints are coming out good, but I see others here are getting .005mm tolerances... What is causing my bed to have these waves between the screws?

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g81:

Recv:   0.14950  0.12750  0.11900  0.14750  0.09850  0.10650  0.12700
Recv:   0.17250  0.21400  0.18350  0.15750  0.16600  0.17050  0.14400
Recv:   0.16150  0.22350  0.21250  0.17313  0.18000  0.20100  0.14400
Recv:   0.13550  0.17600  0.15750  0.14250  0.17863  0.17550  0.14500
Recv:   0.15150  0.21650  0.20550  0.18475  0.21650  0.21850  0.16000
Recv:   0.15700  0.20100  0.20350  0.17450  0.20100  0.19650  0.14400
Recv:   0.14850  0.15550  0.15500  0

This is an mk3, I recently switched out the heated bed. I'm consistently getting this error in this spot. I've googled around looking for answers, but haven't found anything promising. I've been able to pass the xyz calibration without errors, and even run through the first layer calibration (with also does a mesh bed leveling).

Does anyone have any ideas on what the problem could be?

Edit: So I flipped the bed over to expose the PEI side and print with PLA (215 Nozzle/ 65 Bed). Everything works fine. The failures are happening when I'm trying the print with 3dXtech PETG (280 Nozzle / 75 Bed). I'm going to do some more testing, but I think that the sensor failure is related to these