coolpropdude
New Member
This is a thread to share hoverboard prop progress.
Screen Correct Hoverboard Project
- Thread starter coolpropdude
- Start date
coolpropdude
New Member
I have decided to construct my boards out of wood as opposed to gator board foam etc. Here is a raw board with my vacuum formed screen correct parts for a reference. Let me know what you think 
It looks good, but what makes the magnet and battery components screen accurate? Molded from an original? Vaccuuformed over original? Based on measurements taken from an original? To be honest, the magnet diameter looks a little big.
coolpropdude
New Member
No you are incorrect. I used close up images of Bob Gales actual parts - to scale from print out to careful measurement. Then cast in resin and now into vacuum formed parts.
CPD
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Boards going out this week pitbull. I am waiting for the battery packs that will be here Thursday - the rest of the board is complete simply waiting for that part (the one in the pic is resin - the ones I will use are therm o-formed) trust me it will be worth the wait!
CPD
CPD
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Boards going out this week pitbull. I am waiting for the battery packs that will be here Thursday - the rest of the board is complete simply waiting for that part (the one in the pic is resin - the ones I will use are therm o-formed) trust me it will be worth the wait!
CPD
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coolpropdude
New Member
Spyhunter2k if you don't believe me measure them yourself from the originals - mine are 99% correct if not 100%. Every attempt to make parts have always been too small - look around I have seen those parts - the diameter of the smaller bracket is too wide on those - and the magnets themselves are too small - the diameter of Bobs are just under 7" - 6.8999 to be exact. The ones I have seen are about 6 inches in diameter which is WRONG.
Thanks
COD
Thanks
COD
I know this is none of my business but it was obvious he was simply trying to give some constructive criticism , no need to go off on someone
coolpropdude
New Member
Sorry did not mean to offend it is just I have put a lot into these things and when someone implies negative comments it just makes me upset. Sorry again.
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Comment remove - please remove yours. Thanks!
CPD
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Comment remove - please remove yours. Thanks!
CPD
Awesome can you post a teaser pic of my board?
Sent from my SM-N900P using Tapatalk
Clock88
Well-Known Member
I'm sorry, but you are wrong. Your parts look too big because they are too big. No need to get upset about it. I understand you put a lot of work into this but facts are facts. I assume you printed this photo to the scale of the tape measure?
http://i661.photobucket.com/albums/uu339/delorean1981/BTTFII_HoverStunt02-1_zps7a4d9652.jpg
It's important to note: The board and parts are raised about 1 to 2 inches above the tape measure. This method would only work if the part you are measuring are flush with the tape measure. If you printed this out and just took measurements, everything is going to be way bigger (which it looks like it is).
Luckily, we have a known measurement on the surface of the board. One pink stripe is exactly 1.5" wide (**IMPORTANT** DON'T scale the edge of the pink stripe to be 1.5" where it meets the side of the graphic because it is angled diagonally and will be slightly wider - you have to rotate it horizontally first and scale it to 1.5" width).
After you scale that, the base (or bottom) of the magnet measures to be to 6.45 (not 6.899 like you stated). You CANNOT calculate the top of the magnet from this boards scale because it will be inaccurate (because it is raised above). If you do, you will get 4.93 (which is wrong). Last time, TheNickFox came up with a **.044 per inch difference** for the measurements of parts on top. So 4.93 x .044 = .21 ......... so 4.93 - .21 = 4.72
Guess what? 4.72 is the size of a CD which is a KNOWN measurement for the top of the magnets.
We attempted to do it a while back from those tape measure photos and made the same mistakes. An awesome and talented builder on here (formula388) made some great 3D prints from our weeks of work but unfortunately abandoned it for other projects. Hopefully he will finish it soon... they were pretty much finished! Got my fingers crossed, haha.
Here is the thread: http://www.therpf.com/f9/please-help-hoverboard-parts-171300/?highlight=hoverboard+parts
Best,
Grant
http://i661.photobucket.com/albums/uu339/delorean1981/BTTFII_HoverStunt02-1_zps7a4d9652.jpg
It's important to note: The board and parts are raised about 1 to 2 inches above the tape measure. This method would only work if the part you are measuring are flush with the tape measure. If you printed this out and just took measurements, everything is going to be way bigger (which it looks like it is).
Luckily, we have a known measurement on the surface of the board. One pink stripe is exactly 1.5" wide (**IMPORTANT** DON'T scale the edge of the pink stripe to be 1.5" where it meets the side of the graphic because it is angled diagonally and will be slightly wider - you have to rotate it horizontally first and scale it to 1.5" width).
After you scale that, the base (or bottom) of the magnet measures to be to 6.45 (not 6.899 like you stated). You CANNOT calculate the top of the magnet from this boards scale because it will be inaccurate (because it is raised above). If you do, you will get 4.93 (which is wrong). Last time, TheNickFox came up with a **.044 per inch difference** for the measurements of parts on top. So 4.93 x .044 = .21 ......... so 4.93 - .21 = 4.72
Guess what? 4.72 is the size of a CD which is a KNOWN measurement for the top of the magnets.
We attempted to do it a while back from those tape measure photos and made the same mistakes. An awesome and talented builder on here (formula388) made some great 3D prints from our weeks of work but unfortunately abandoned it for other projects. Hopefully he will finish it soon... they were pretty much finished! Got my fingers crossed, haha.
Here is the thread: http://www.therpf.com/f9/please-help-hoverboard-parts-171300/?highlight=hoverboard+parts
Best,
Grant
coolpropdude
New Member
Hate to burst your bubble but if you look at the pic that has the tape measure FLAT ON TOP of the board back you can CLEARLY see that the diameter of the top of the magnet is 5.25"!! NOT 4.75!! My parts are not perfect but they (compared to a screen shot) fantastic recreations that VERY Close to the original size. Reference http://i661.photobucket.com/albums/uu339/delorean1981/BTTFII_HoverStunt03_zpsc6cf2406.jpg
coolpropdude
New Member
AWESOME!!! AMAZING work!
I wasn't trying to be negative. I was just curious about what made these parts "screen-accurate". To be honest, most people wouldn't use such an ambitious claim without explaining in the first post why they believe it is valid.
Now that we know you created your measurements based on an overhead photo shot...As Grant pointed out, using the tape measure for guidance only works if it is on the same plane as what you're trying to measure. Since the surface of the magnets are protruding upward towards the viewer in that pic, it causes a parallax lens distortion effect that makes the measurement of the closer-to-camera surfaces to be larger than they really are in relation to the lower surfaces in the pic closest to the tape measure, and as it turns out, these distortions are actually quite significant, in that they are noticeable to the naked eye. Please read the thread Grant posted, where he and the NickFox discussed this on p. 2.
I've stared at hoverboard images for more hours than I care to admit, and I believe the same goes for Grant. We're only trying to help. As is, your parts look great, and I wish you luck on your project.
coolpropdude
New Member
All I have to say is - better than Mattel's efforts Their parts are simply horrid. Thanks for the info and compliments - cheers!
Their parts are simply horrid. Thanks for the info and compliments - cheers!
Clock88
Well-Known Member
Clearly? The tape measure gets cut off in the picture! How did you get 5.25 (for the top of the magnet) from that photo? 4.72 to 4.75 is a known measurememnt for the magnet tops!
When we were trying to get the measurements we couldn't do it from that photo alone (yes, I have seen it before and used it for the battery measurements). Did you account for camera parallax like we ultimately did? Another note: compare your magnet 'diagonal slopes' (from top to bottom) - the angles and lengths are clearly wrong just by looking at the pictures - they look way too short. We had the exact same problem ourselves because we didn't account for the change in scale when you rest a tape measure on top of the parts and compare it to the parts that are farther away from camera (yes, in that photo where the tape measure is on top of the parts - it's still not laying flat on the board). The same is true when we used the photo with the tape measure on the table.
I'm not trying to be an as*hole here... I want to help. Myself, Spyhunter2k, NickTheFox, formula388, and many others spent a long time making adjustments and we used the same photos you did. Formula388 has not released the final model yet but hopefully he will in the near future. We learned from our mistakes when we saw the 3D prints did not look correct. Our first rendition looked very similar to your one. Why are you so defensive and offended?
Read all our comments in the thread I linked previously here: http://www.therpf.com/f9/please-help...verboard+parts
Best,
Grant
Clock88
Well-Known Member
Just read Spyhunter2k's comment - way better said than myself. :thumbsup
You said.... "All I have to say is - better than Mattel's efforts ..."
I think a blind guy who listened to the movie once while he was asleep could produce better results from Mattel. You need to aim higher than that!
You said.... "All I have to say is - better than Mattel's efforts
..."I think a blind guy who listened to the movie once while he was asleep could produce better results from Mattel.
You need to aim higher than that!Similar threads
