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Roll_On

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About Roll_On

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  • Location
    Northern California
  • EUC
    King Song KS18

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  1. Hi Everyone: My left arm was much better, and today Sat 5/02/2020 I open up the KS-18S to see if there was a simple reason for the power cutout. The fuse was blow quite badly. One of the fuse leg was blow totally away, probable due to a big electrical spike. The fuse receptacle of one leg was damaged as well. The fuse still remain with one leg in the fuse socket. See photo. I manage to adjust the receptacle to allow insertion of a replacement fuse. I added a tiny solder dip to insure a firm hold of the fuse. I send photo to eWheel. Hope there is an explanation why the huge electrical spike. Now, the KS-18S is back to normal, and I am riding in the neighborhood in standing position. I should be commuting to work shortly. I learn my lesson, and I will NOT be riding seated with speed greater than 5 MPH. https://drive.google.com/file/d/1UfjroalAnCCWyFYi5QSglIJkQk1hzjNw/view?usp=sharing The unpredictability of fuse blown leading to power cutout is quite scary. Reply to Darrell Wesh's comment: "most people say your knees take all the impact in a seated cutout and you have less of a distance to fall so the fall is less severe." When the auto balance is gone due to power cut out, your body falls forward so fast with so much force, the head/helmet would hit the pavement if not for the hand that was bought to the front of the head. The EUC seat is 28" from the ground. My body seated measure 36" from the seat to the top of head/helmet. Once the EUC loose its balance, and starts to fall forward, the bulk of my weight 170 lb. times the speed about 10 MPH is thrown forward onto the ground. There is lot of impact force which explain why my left arm bone fractured and dislocated. My knee only have a small scratch without knee pad. If I was standing, and falling, the body, the stronger leg bone will help to absorb a lot more impact force.
  2. Thanks Darrell for mentioning that your KS-18s motor cutout was due to wire disconnection. I will have my final left arm surgery to remove the pins on Mon 4/20. Soon after that I will open it up and check on the wire, and report back. Side topic, Darrell was your friend riding KS-18S standing or seated when the cutoff happen? Once my left arm / wrist has regain all the motion, I do plan to ride the KS-18S for commute, and in standing position for continue safety, (a) Car drive can see me better, (b) Able to see a bit further out for road condition, and (c) Evasive jumping off the wheel when needed.
  3. Thanks for the get well message. To answer a few of the questions asked: Any other protective equipment beside your helmet? After more than 2 years of commute riding experience, I stop wearing knee padding, and arm padding especially at low commute speed. While riding in standing position, I have encountered a bad wide crack in the road, and was able to jump off without injury. Now it makes senses that you cannot do evasive movement while seated on the EUC. What do you think caused the cutout, just random or was it due to sitting? Sitting is not the issue. I am 170 lb. I have open the KS-18S to change flat tire after learning to ride sitting down for. I did not notice any structure issue with the plastic. The weather is not hot in the S.F. Bay Area, and I have not notice any heat build up. After the power cutout, the KS-18S could not be switched on. BTW, I have yet to ship the KS-18S back to Jason of eWheel due to lack of a good left arm. KS-18S is heavy and bulky once packed, and two hand is needed to bring the large package to FedEx for shipment. Soon I will ship it back to eWheel, and I will report the problem diagnose by eWheel. Are you sure there were no battery problems. does the battery charge fully? KS-18S was 8 month old, and never any battery issue. At the start of commuting home, the battery was at 90% of full charge. I suspect it was a chip on the circuit board. We will see what the diagnose by eWhee.
  4. My usual commute speed is around 10 MPH due to traffic lights on the street. The recovery is about 6 weeks to 8 weeks depending on your age and physical fitness. I am physically fit but I am pass age 60. Learning something new is always good. I have always thought that a seat EUC could be a great utility vehicle should you hurt your leg such as ski accident. So, a seated EUC can help you get around easily on slow speed just like a electric handicap chair.
  5. I am a rider of EUC since May 2017 and never with any injury. At first I was using Inmotion V8 (no seat), and now for the last 8 months I am riding KS-18S (with a seat). I have only been riding the KS-18S in standing position so that auto driver could see me better with the flashing red light on the helmet. Just recently, on a commute ride (3.5 miles one way), I decided to ride seated since I am less than half mile from home. The power just happen to cut out (with no prior warning of any electronic issue and battery at 90%), and I just crashed into the pavement so fast I was immediately in massive pain. My left arm just happen to be closer to the pavement, and took all the damage. The ulna bone dislocated, and the radius bone fractured (such severe pain). Helmet protected my head and face, and no injury to the leg or the body as I fell forward with no auto balance. The specialist doctor knew something about the EUC (kind of surprise), and he explained that there was no other part of the body to distribute the impact force, and that is why the left arm took all the impact force. Since the arm bone is much smaller than the leg bone, fracture is the expected result. If I were riding in standing position, and falling, the leg and the body with more body mass would absorb the impact much more. Since there is no way to know when power will ever cut out, I will not be riding in seated position even on normal slow cruising speed. The injury pain and suffering, medical costs, and being handicap for 2 months is just not worth it. The KS-18S seat could still be useful when you like to rest your leg at a stop light, or at a coffee shop.
  6. When my KS-18S power cut out so sudden, and I was riding in a seated position, I just cash into the pavement so sudden like any other face plant except there is not enough body to distribute the impact force, and my left arm was badly injured. I do not recommend ever riding seated for even normal speed. Here is my story: On a clear good weather day I was commuting home (3.5 miles one way) riding seated on KS-18S (only used 8 months never with an issue). My usual commuting speed is about 10 MPH or less. About half mile to home, the KS-18S power cut out (with no prior warning of any electronic issue and battery at 90%), and I crashed into the pavement so fast I was immediately in massive pain. My left arm just happen to be closer to the pavement, and took all the damage. The ulna bone dislocated, and the radius bone fractured (such severe pain). Helmet protected my head and face, and no injury to the leg or the body. The specialist doctor knew something about the EUC (kind of surprise), and he explained that there was no other part of the body to distribute the impact force, and that is why the left arm took all the impact force. Since the arm bone is much smaller than the leg bone, fracture is the expected result. If I was riding standing, and falling, the leg and the body with more body mass would absorb the impact much more. For the past 8 months, I have only been riding in standing position so that auto driver could see me better with the flashing red light on the helmet. It was only because I was so close to home that I decided to ride seated, and the power cutoff happen. Before KS-18S I have rode the Inmotion V8 (no seat) for 2 years.
  7. Currently, I am over 60, and ride KS-18S (which comes with a seat). In the last two months, I have been riding sitting down in preparation for the 2nd L.A. EUC Games Freestyle. The Immediate response that I get: - All the people give way thinking that I am some kind of handicap person. I don't have one of those handicap sign. Now if I were riding standing up especially near a pedestrian, they would not give way, instead they would give me some nasty look like I am a trouble maker kid. - There have been a number of senior citizens who is either on a wheel chair, and not on a wheel chair that have commented, "is this a new type of wheel chair?" I often give a quick demo, and they would very quickly be put off, and seemed quite scared. I don't try to convince them since I did not having much success with the younger age people.
  8. Hi /Dev/Null: KS-18S is my 2nd EUC. Maneuvering while standing is easier than sitting. The trolley handle is not necessary. You can easily walk and move the EUC with your hand placed on the seat or handle without the seat. The KS-18S shell is very strong. I am 170 lb. and with backpack 20 lb. is very supportive of my total weight. There is no issue even going over big bump on the street. I participated in the L.A. EUC Games 2019 Freestyle performance using KS-18S. Experience EUC riders have commented that it was heavy, and not maneuverable, but not quite true. You can see my re-enacted Freestyle performance "Singin' in the Rain" with the link below: https://drive.google.com/file/d/1HzEmZy4Pba_gbFePyeDpWzYED5YvApoc/view?usp=sharing Being heavier, the KS-18S is very stable, and I could even do simple tap dance on the pedal. On the upcoming L.A. EUC Games 2020, I will do a performance sitting down.
  9. Hello Flyboy 10: Many thanks for capturing my Freestyle performance (the 1st performer with umbrella). Posting to a web site like YouTube or Google Drive is OK with me as long I could download the entire video. Concerning your statement, "but my memory card was full after the 3 performance", thus being the first performer in this case appear to be an advantage You can send me the link to my e-mail dowu@dir.ca.gov.
  10. Thanks to Alien Rides and meepmeepmayer for capturing Dominic's freestyle performance, the 1st rider with umbrella performing Singin' in the Rain. By any chance you have captured the entire 2 minutes performance. If so, can you upload the video to some web site so that I can download it. This is very memorable, even after hitting an obstacle, and falling down near the end. Thanks, Dominic (forum name Roll_On).
  11. Anyone riding the KS-18S at night used the blinking white LED? It blinks so fast that it can be somewhat disorienting to see clearly. It remind me of auto timing light use for maintenance. The only option is on or off, and no adjustment for the blinking speed. Anyone has a fix?
  12. Update: I sent the KS-18S back to eWheel, and they found the issue. It was in the 3-wire bundle on the left side that attach to the wheel / motor. One of the 3 wire insulation was scrapped as the wire is either moved out of the unit, or move back into the unit in a tight small hole. On the right side is a single wire Hall sensor. In the disassembly as you try to move the wheel / motor out of the unit, you have to doubly check both side, and thread the wire both side very carefully, and all the while trying to manage the heavy weight 55 lb. of KS-18S There are some things office worker just don't have the mechanical dexterity. From eWheel, "With a bit of liquid tape, it's as good as new".
  13. Hi Jesi: I am a new owner of KS-18S. I have manage to disassemble the unit to change tire / tube, and at the same time documented (MS Word file) with step by step instructions and photo. Send me your e-mail to me dowu@dir.ca.gov , and I can sent the document to you. I cannot attach the document here because the file size exceed the Forum file size limit 3.1 MB
  14. In checking over everything like a cut wire, there was nothing. Then I saw the 3rd battery jack hidden in the corner of the add-on battery (my EUC has 1680Wh)!!! During the disassembly, I only saw two battery jacks and disconnected two jacks. On my 1st EUC Inmotion V8 there was one battery and one jack to disconnect. On this KS-18S there were two batteries, and disconnecting two jacks seems perfectly logical while the 3rd is hidden. Thus, there was probably still power in the main board. I did not do a final confirmation check by switching on the EUC!!! When removing the two wires from the control board (one goes to the right side of the motor wheel, and the other goes to the left side of the motor wheel), a voltage spike probably damage either the Hall sensor, or the chip processing the Hall sensor signal. The EUC will be sent back to eWheel for repair. Expensive lesson learn. Always check that the power is gone before unplugging any wire from the main board!!!
  15. Symptoms After Tube Change: Switch on power everything seems OK. EUC balance; Able to connect with iOS KS App; Lights working; Horn working. When you move the EUC by hand slowly, there is an immediately beeping sound, and warning at the Apple iOS App (“Motor Hall”), and lady speaking very quickly, hard to make out what she said. The EUC also does not move smoothly, jerking movement. I did not ride, just switch off the EUC. After checking all connections, still the same symptoms. I would greatly appreciate any assistance. What I Did: 1) Open up the unit (two side panels, and top panel to control board) very carefully. 2) Label all the wire before disconnect the power related jacks on the left side with the battery (primary and extra battery). Note: EUC front is the switch and charger port, and EUC back is the trolley handle, and battery level indicator. 3) From control panel: a) Disconnect the 3 wire jack that has 3 wires bundle to the motor (EUC left side) b) Disconnect the 1 wire jack that has 1 wire to the motor (EUC right side). I think this is the motor hall. BTW this jack has white glue preventing easy removal. So, I had to slice the white glue just a bit to allow the jack to be lift out with no touching of the wire and the board. 4) Remove the 6 hex nuts on both side. Thread the 3 wire bundle, and 1 wire carefully out to let the wheel drop out of the EUC. 5) Change tire/tube. 6) Re-install everything back slowly, and the label wire help reconnect all the jacks correctly, and making sure it is tight.
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