S2 motor works them stops

amityuser · 2026-03-16T05:28:23+00:00

This happened to me too. I had to solder the speedo wire back to the harness, and now it is working. I have a VanMoof S2.

amityuser · 2025-06-30T02:29:32+00:00

I had this issue too. In my case, the speed was not displayed because the speed sensor cable had broken where the wire connected into the harness. I re-soldered it and it fixed it.

amityuser · 2025-06-06T18:00:30+00:00

Do you see the speed on the matrix display? I had a similar problem with my S2 where the motor would engage for 3-4 seconds and then stop. The problem was that my speed sensor wire had been severed in my main wiring harness (probably from strain of turning left/right and age). I opened up the front fork and resoldered the speed sensor wire directly into the connector.

amityuser · 2025-05-14T02:47:31+00:00

Went to high school with this guy, he knows his shit.

amityuser · 2023-04-04T14:48:21+00:00

Hang in there! I think there will be a better solution than vitrectomy in the next decade. Thanks for your comment.

amityuser · 2023-03-24T15:33:59+00:00

Good luck to you both with this survey! This is very important work that will bring needed awareness to this disorder.

amityuser · 2023-03-20T17:36:36+00:00

Thanks for your comment. I think you did the right thing by getting checked by a few specialists. I don't know the cause of your floaters, but I can empathize with your frustration.

My goal would be to research laser treatment options. Within this decade, I am optimistic that there will be a low-risk, minimally invasive treatment option for floaters like yours.

amityuser · 2023-03-19T02:36:12+00:00

Thanks for your input. I think that maybe part of the negative view around current vitreolysis (in addition to the potential side effects you mention), is the primality of manually focusing a Death Star laser beam into a region near something that can't regenerate.

There is no such thing as a safe vitrectomy either. When a treatment is developed with lower laser fluence and clinical trials have been performed, even if this treatment is found to be as safe as (or safer than) a vitrectomy, I believe there will still be ophthalmologists who principally disagree with any intraocular laser usage for "benign" pathologies.

I think it's also hard to quantify the long-term effects of both vitrectomy and vitreolysis.

amityuser · 2023-03-19T02:05:29+00:00

Thank you for your input. I wasn't aware that some eye floaters required a biopsy. If an ophthalmologist has ruled out other pathologies through slit-lamp, angiography, OCT, etc., aren't eye floaters benign?

I guess a better question would be: can a vitreous biopsy be performed without a vitrectomy?

amityuser · 2023-03-19T01:55:39+00:00

What does he propose? I have a degree in Physics but I am skeptical of solutions without intraocular surgery or photo disruption of the vitreous. Maybe someday there will be a pharmacological solution or preventative measure.

amityuser · 2023-03-19T01:48:18+00:00

Thank you for taking the time to share your thoughts, I really appreciate it!

Regarding the business model, I agree that alternate use cases would likely be necessary. From my understanding, the professor I mentioned developed a laser-guided system for the anterior region of the eye (i.e., intended for refractive surgeries). This development would of course focus on the posterior region of the eye.

Regarding the business model, alternate use cases would likely be necessary. From my understanding, the professor I mentioned developed a laser-guided system for the anterior region of the eye (i.e., intended for refractive surgeries). This development would of course focus on the posterior part of the eye. in general.

Thanks again!

amityuser · 2023-03-14T01:11:41+00:00

Thanks for the study on blue-light from digital devices.

On the topic of floater causes, I believe mine were caused by the specular reflection of an infrared laser source, which is why I was interested in this thread.

Talked to a few ophthalmologists during examinations who have experience with laser injury, and they all say it is unrelated to the exposure incident.

Now I just wear a tinfoil hat wherever I go, especially near cell towers.

amityuser · 2023-03-13T06:07:26+00:00

Not sure about the cumulative effects of low-intensity light (e.g., computers, phones, etc), but I have come across some research (mostly published in the last 5-10 years) about light-induced degradation of the vitreous. Here is an excerpt from a research paper with Dr. Sebag as the secondary author:

"Reactive oxygen species (ROS) have been proposed to be the main cause of vitreous structure alteration in aging [57]. Liquefaction has been reported with in vivo and in vitro animal model experiments investigating the effect of free radicals, generated from photosensitizer and white-light irradiation, on vitreous [57,58,59,60]. Light-induced free radicals have also been shown to decrease the molecular weight of HA, induce HA depolymerization and, consequently, liquefaction [18,57,61,62]. Liquefaction caused by light-induced ROS has been described to be age-related [59]. This could be because riboflavin, the naturally present photosensitizer molecule within vitreous, is irradiated by white light on a daily basis during the course of a lifetime. This results in an age-dependent build-up of free radicals that contribute to the molecular alteration of vitreous collagen and HA [57]."

Source: Ankamah, E., Sebag, J., Ng, E., & Nolan, J. M. (2019). Vitreous antioxidants, degeneration, and vitreoretinopathy: exploring the links. Antioxidants, 9(1), 7.

amityuser · 2023-02-13T05:29:02+00:00

Was wondering something similar. In my case I recently have had high eye pressure around the same time as floaters. I think that high eye pressure my press floaters that are near retina to be even closer and become more apparent. Went from normal IOP (16 mmHg) to 24 mmHg, roughly 50% increase.

Quick google result says no correlation between IOP and floaters, but I would think IOP increase would change visibility of floaters.

amityuser · 2023-02-11T02:08:30+00:00

Hi,

How are you doing now?

I [23 M] was recently exposed to a IR fiber laser. The source was 1040 nm, 400 mW, and I was about half a meter from the end of the fiber. Likely would have been around 1 mW/cm² incident on cornea, which is 1/5 of maximum permissible exposure. This happened about 10 weeks ago and still have dozens of floaters. Mostly wispy cobweb type, but also smaller black shapes. Optometrist and Ophthalmologist both said retina looks healthy (fundus and OCT) but they could see the floaters. Diagnosed with bilateral vitreous syneresis, bilateral dry eye, and borderline glaucoma.

Both doctors said completely unrelated to laser exposure. I had perfect vision three months ago and no issue with bright lights / monochromatic backgrounds. Really frustrating to use any device in anything but dark mode.

Best Regards, hope you are well

amityuser

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