Servos system issues

[karmic zenith]

Y'all know why it's doing this? Maybe the faceplate is too heavy? It used to work I'm confused I tried tightening and loosening the servo arms too.

[fleet nimbus]

Hey @karmic zenith, thank you for contributing to this forum.
Please provide as much information (images, video, description) as you can. This will increase the chance that someone can help you with your issue.
Use the Close button when your issue is resolved.

[waxen terrace]

If it used to work then something is either binding or the helper arm screws are too tight. Even the smallest amount of resistance stops those servos.

I assume the battery bank is fully charged and the correct amperage? 5v/2amp

Also with your switch wires. When not using a switch you should just tap the wires quickly. Not hold them together

[karmic zenith]

The switch actually came off before I filmed this lol, it's hard to tap it with one hand

I did try adjusting the screws but nothing

Im kinda thinking the plate is heavy, it has a hard time staying up anyway when I manually move it, even before

It's at a 15% infil I believe so I could knock that back to 10 or 5 maybe

[waxen terrace]

Did you test with the switch wired up?

[karmic zenith]

Yeah same results

It was soldered but my solder is kinda crap and the wires came off lol

[waxen terrace]

It’s possible, mine was printed at 12% and opens/closes. Although I was having issues with it overshooting it’s angle slightly, which was fixed by reducing the open speed and open angle. It’s possible that was related to weight..

No pinch points between the faceplate and dome?

[karmic zenith]

Nope

It worked with the jaw on too

But had a hard time staying up still, like after it opened the plate would just kinda fall back down and not stay

Messing with what angle the helmet was at helped a little bit not much with it

Same thing for it opening

[waxen terrace]

Do you have a video of it operating properly?

[karmic zenith]

I do but it's on my PC

I'm at work rn on my phone, it's footage for my yt video on motorizing it

[waxen terrace]

Ok, Share it later when you can. Just want to compare the two. Was the first successful test with just bare plastic? This current video is after primer/filler?

How many helmets have you motorized?

[karmic zenith]

It was just with the plastic

All I did was add filler putty and it still worked

[karmic zenith]

@waxen terrace

why was it upside down

i have no clue

but it worked the same right side up

[waxen terrace]

The largest current draw which causes the most issues for people is opening the faceplate. Yours opened right side up correct?

Did you un bolt everything to add putty then put it back together?

Also who modelled this helmet? Does it have built in motorization?
Board type?
Power supply?

[karmic zenith]

Yes it opened right side up, I added putty with everything together, and it's walshes mk 42 file and it has motorization, it's an Alisha, power supply is like 38k mah 5V2.1a battery pack

It used to open with the putty as well

[waxen terrace]

Everything sounds good. I assume you ordered mg90S servos. Did you confirm they were 180 degree? Just attach the horn and spin each one to confirm they hit a dead stop.

If that’s all good then the only thing left is power supply issue or fitment (something binding).

I would hook that switch back up, doesn’t need to be soldered for testing. Is it a NO limit switch?

A way to test if it’s a power issue. Use a usb wall outlet that has 2amp 5v minimum output.

I use this, but a phone charger block works but usually their only 1amp output

My helmet was a struggle, but eventually I got it to work. Then once I painted it wouldn’t open like yours is doing. I kept loosening the 4 helper arm bolts half turn at a time until I found the sweet spot and it opened

[karmic zenith]

dont have one

[karmic zenith]

Sorry for late update, this is an issue lol

Servo screw is stripped and I think the little plastic arm where the gear sits is stripped out too on both

But how these arms are designed are... Odd.

[waxen terrace]

That is definitely an issue. If those gears skip even a couple teeth it will cause problems.

How did you manage to strip the screw? It should screw in fairly smoothly. Unless you cross threaded it.

Those arms are an odd design, is this one of his newer models or old?

Did you mirror them when printing?

I tried his “built in” gears but they didn’t work well. So I ended up using the included servo horns

[karmic zenith]

yeah i had to mirror the arms he included one side, and i have to insert the soft plastic wing included with the servo, and i stripped the screw in the head cause im dumb lol, and this is his new mk 42/43 v2 model

im thinking about talking to him about this design because it really looks like its straining the hardware and making things more difficult

[waxen terrace]

Well if you stripped the screw it potentially didn’t tighten fully causing the servo horn to be loose and skip gears which eventually stripped it

Just a theory

If that servo is stripped now try another one

[karmic zenith]

cause that extra bit there on the arm that sits on the servo where the gear is located is just causing tension and not allowing the gear to seat properly in the plastic wing

[waxen terrace]

You could always modify those arms and cut off the pieces causing tension if there not actually helping. Worse case you print new arms

[karmic zenith]

if i tighten the screw the whole way with that bit on the servo arm it creates a lot of friction making it difficult the move and because it cant go the whole way it would just make the screw completely come out because of the loosesness

[karmic zenith]

this i did cut off the extra bit off the servo arm

[waxen terrace]

You can get creative by modifying the arms. I had to completely cut/drill out the gear section and add my own. Also resized it in one axis by 5% to get a better angle.

So you modified it before the stripped screw issue?

[karmic zenith]

nope

[waxen terrace]

After, okay. Did you confirm the servos were 180 like I mentioned earlier?

That small thing caused me loads of issues

[karmic zenith]

This guy is so chewed up inside jesus

[waxen terrace]

Yeah, that’s never going to open a faceplate 🙂

[karmic zenith]

probably what happened is because i tried so hard to use the og design that since only the edge of the gear was it it didnt have the grip and just chewed the hell out of it

[waxen terrace]

?

[karmic zenith]

yee

[waxen terrace]

Good, I ordered two separate batches of 180. One from aliexpress and another from Amazon. Both were actually 360 and caused me tonnes of issues. Now I always confirm right from packaging.

So test out that new modified arm, the screws should go in like butter.

This is a good way to attach your arms. Tape it all in place. Power up the board so they home to closed position. Attach the arms. Remove tape and voila

The green tape is to keep a nice gap for after paint

[karmic zenith]

thats pretty much what i did

im gonna talk to walsh about this to see either if im doing something wrong or if this is a design flaw

cause i genuinely belive the root of the problem is the arm design

[mental mango]

Hi @karmic zenith! Did you resolve your issue here?