LocostUSA.com

Learning how to build Lotus Seven replicas...together!
It is currently December 12, 2019, 12:50 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 8 posts ] 
Author Message
 Post subject: DIY weigh scales?
PostPosted: October 4, 2019, 6:33 pm 
Offline
User avatar

Joined: May 31, 2019, 12:37 am
Posts: 50
Location: Alberta
Hey everyone, I know at one point, after the suspension is done, I’m going to be needing a way to weigh all 4 corners. It seems people have been able to use a heavy duty bathroom scale and weigh the corners one at a time, but that doesn’t really interest me.

I was looking at this shipping scale unit that really cheap and with 440# max it should fit the bill.
Amazon
Attachment:
F2893A9F-4DA2-446C-BDA3-92423F25C9A7.jpeg
F2893A9F-4DA2-446C-BDA3-92423F25C9A7.jpeg [ 132.36 KiB | Viewed 515 times ]


I like the remote screen it has, as it would give the ability to build a box to house all 4 and charge them as well. If I was able to do programming I’d definitely look into a separate screen that shows all 4 and front/back splits on it.

If I can manage to find a 500# scale for similar price I’d definitely go for that

_________________
If it’s not custom, I don’t want to hear about it!

Youtube Series

Willy’s Hayabusa Build Log


Top
 Profile  
Reply with quote  
 Post subject: Re: DIY weigh scales?
PostPosted: October 5, 2019, 8:50 am 
Offline
User avatar

Joined: September 22, 2005, 8:12 am
Posts: 1629
Location: 4AGE in S.E. Michigan
I could not justify the cost of electronic scale(s) for a one time use. I was able to get two bath scales for less than $25. I fabricated a bridge that would span between bath scales and wide enough for the tire to set on the bridge. The bridge can be made from wood or steel, but the higher the bridge, the thicker the spacers will be required for the pads needed to level the set-up surface. Note You need to take care when locating and shimming your floor pads. You are going to end up with four different pads thicknesses to get a level surface in your typical garage floor. [Try to get all 4 pads within 1mm]
Note my garage floor sloped about a 1/4" in the length of the car's wheel base. That slope added about 7 or 8 lbs to each rear wheel, before installing leveling pads to the set-up. After the final spring adjustment, I went back and rechecked all four corners and verified the weights. This system was repeatable within 3 lbs using a bridge and bath scales for adjusting corner Wt.
Another option is flat flooring. This method is much easier and does not require scales but is not as accurate. Set the car on the leveling pads lay a straight edge across the leveling pads as a base line. I used an extruded aluminum bar but you could use fishing line. It just a simple matter of measuring from a common point, I used the front LCA bolt on both sides. Then adjust the springs perches to arrive at equal heights. I use this method first for setting up my car, and worst case, one wheel was 18lbs heavy Vs the corner wt method. To be honest you will probably not feel any road difference using the flat floor method when setting up your car, unless your middle name is Shumacher.
One disclaimer: I did use a transit to set the leveling pads in the garage floor. If you would like a photo of the scale/bridge, I could take a shot of it.
Davew


Top
 Profile  
Reply with quote  
 Post subject: Re: DIY weigh scales?
PostPosted: October 5, 2019, 9:04 am 
Offline
User avatar

Joined: October 24, 2008, 2:13 pm
Posts: 4073
Location: Carlsbad, California, USA
You might want to do a search here. Different ideas have come up over the years. One was a very simple use of levers (& springs? - Can't remember) doing one wheel at a time. It wouldn't be as accurate as 4 scales on a level floor, but if it was within 5-10 pounds, that would be good enough for my purposes.

Cheers,

_________________
Damn! That front slip angle is way too large and the Ackerman is just a muddle.

Build Log: viewtopic.php?f=35&t=5886


Top
 Profile  
Reply with quote  
 Post subject: Re: DIY weigh scales?
PostPosted: October 5, 2019, 12:37 pm 
Offline
User avatar

Joined: May 31, 2019, 12:37 am
Posts: 50
Location: Alberta
Thanks guys. I know it might seem frivolous, but I’m pretty set on all 4 at the same time. And for $200 CAD it’s really not a huge expensive.

I plan on using them quite a bit during fabrication, right after my wheels are mounted so I can adjust battery, fuel tank, sump tank etc to maximize balance.

_________________
If it’s not custom, I don’t want to hear about it!

Youtube Series

Willy’s Hayabusa Build Log


Top
 Profile  
Reply with quote  
 Post subject: Re: DIY weigh scales?
PostPosted: October 5, 2019, 3:53 pm 
Offline
User avatar

Joined: October 24, 2008, 2:13 pm
Posts: 4073
Location: Carlsbad, California, USA
I've read about "levelling compound" to make your garage floor truly flat. It sounds like a liquid that you pour into a rectangular form and let dry to a hard surface (epoxy?). Has anyone tried doing that to get a truly level surface?

I sounds like a very good thing to do, if it's actually practical. I've got this nice British book on setting up Locost ride heights and alignments. The first thing they talk about is making the garage floor truly level.


Cheers,

_________________
Damn! That front slip angle is way too large and the Ackerman is just a muddle.

Build Log: viewtopic.php?f=35&t=5886


Top
 Profile  
Reply with quote  
 Post subject: Re: DIY weigh scales?
PostPosted: October 6, 2019, 7:58 am 
Offline
User avatar

Joined: September 22, 2005, 8:12 am
Posts: 1629
Location: 4AGE in S.E. Michigan
"The first thing they talk about is making the garage floor truly level."
Trying to level a garage floor the size, i.e. area, of an auto, would be very difficult. [I know and $$$]
Just mark 4 areas on the garage floor. Then make four shim packs, I used wood and sheet metal stock. Label each pack with the location, so it's easy to set-up, when you need to. Will take about a hour the first time, but can re-set in minutes.
Davew


Top
 Profile  
Reply with quote  
 Post subject: Re: DIY weigh scales?
PostPosted: October 6, 2019, 9:38 am 
Offline
User avatar

Joined: October 24, 2008, 2:13 pm
Posts: 4073
Location: Carlsbad, California, USA
davew wrote:
"The first thing they talk about is making the garage floor truly level."
Trying to level a garage floor the size, i.e. area, of an auto, would be very difficult. [I know and $$$]
Just mark 4 areas on the garage floor. Then make four shim packs, I used wood and sheet metal stock. Label each pack with the location, so it's easy to set-up, when you need to. Will take about a hour the first time, but can re-set in minutes.
Davew


Do you have any photos, Dave?

Cheers,

_________________
Damn! That front slip angle is way too large and the Ackerman is just a muddle.

Build Log: viewtopic.php?f=35&t=5886


Top
 Profile  
Reply with quote  
 Post subject: Re: DIY weigh scales?
PostPosted: October 6, 2019, 6:26 pm 
Offline
User avatar

Joined: January 2, 2009, 1:45 pm
Posts: 1221
Location: Halifax, Nova Scotia
Not to mention that a truly level garage floor would be a PITA every time you drove into the garage on a wet or snowy day. For those of us who don't live in the dry south ....

_________________
Warren
Isuzu Pickup/SR20DE, +401 COLD frame
Build Log: viewtopic.php?f=35&t=11601


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
POWERED_BY