Tech Spam thread - because 1/4" BSP gets 5 hand spans to the jiggawatt

[ThePog]

Just now, h4nd said:

Well there you are, add a magnet, $1.80 hall effect sensor, $5 Ali ex motor drive, and con some mug into spending 10min writing Arduino software

Ah that software thing was the bit scaring me off...

[mjrstar]

Cable actuated rotary encoders might be more easily hidden.

[Unclejake]

42 minutes ago, Nominal said:

Hydraulics I reckon.

 

This could be the electric parking brake of beds. 

[ThePog]

I considered many methods including air and hydraulics, but the simplicity of electric and having lots of 12v capacity on board won the day. I know there would be some racking but it is way worse that I imagined, probably due tobthe weight imbalance ..

[h4nd]

There you are, just reduce the drive on the light side. How many amps?

Or, Can you link the back of the worm drive with sprockets/chain, if you're looking for a mech solution?

[ThePog]

7 minutes ago, h4nd said:

There you are, just reduce the drive on the light side. How many amps?

Or, Can you link the back of the worm drive with sprockets/chain, if you're looking for a mech solution?

Ill need to check with a bit more weight on there, but 4x actuators were pulling about 8 amps total.

I have already made/tried something that was linked chain driven sprockets with acme thread and lift nuts with 3d printed drive mounts, but the compounding frictions made it unworkable. So now I have a shitload of acme thread and chain lying around waiting for the project that might need them...

[Nominal]

You are going to need some sort of position feedback, and some software to control it. 

There are arduino accelerometers that would probably do the job.

Then it's just a programming exercise

You might find this interesting?
 

Self leveling campervan - Using Arduino / Project Guidance - Arduino Forum

tl:dr?

[GARDRB]

Recaro boffins, lend me your ears. 

I have some factory ae101 Corolla Recaro rails from the factory fishnets, they are the 6 bolt pattern. I've looked at Accord Recaros and remember them being a 4 bolt pattern. Is there any rule for which seats are 6 bolt and which seats are 4 bolt? Ideally I want some modernish seats, but need the 6 bolt pattern. 

It looks like Evo 7 onward must have changed to the 4 bolt pattern? Are Civic/Integra seats 6 bolt? What about Suzuki Swift?

[shizzl]

Wheel kg ratings.

 

a while ago I was hinted to look into load ratings of wheels I’d like to fit up.

 

my ute has a gvm of 1900kg give or take a little.

 

my optimal wheel is rated to 690kg, I’m guessing that this is per corner and 2770kg gvm.

 

am I on the right track there?

[RXFORD]

Yes, just divide your gvm by 4 and that gives your corner weights. Tyres need to suit the gvm also. 

Thankfully axle loadings havn't been introduced as that would complicate things even more especially with utes.

[shizzl]

Thought it sounded right anyway.

yeah axle weights are another can of worms I don’t feel like dealing with. 

[kws]

8 hours ago, GARDRB said:

Recaro boffins, lend me your ears. 

I have some factory ae101 Corolla Recaro rails from the factory fishnets, they are the 6 bolt pattern. I've looked at Accord Recaros and remember them being a 4 bolt pattern. Is there any rule for which seats are 6 bolt and which seats are 4 bolt? Ideally I want some modernish seats, but need the 6 bolt pattern. 

It looks like Evo 7 onward must have changed to the 4 bolt pattern? Are Civic/Integra seats 6 bolt? What about Suzuki Swift?

From what my friend said, who was running the same rails in his Corolla, you're pretty well limited to anything around the age of Fishnets or SR2/3 from something like a Civic/ DC2 Integra Type R. Anything newer, like Evo 5 onwards, DC5R, Accord Euro R etc will be the 4 bolt pattern. He was going to change to floor mounted buckles and use modern rails, but sold the car before that.

[fletch]

What about those linear position sensors like the cheap dro ones for your mill? I'm sure you can get 4-20mA output ones for cheap in any length.

Stick em on the side of the actuators and into an arduino with 4x motor outputs.

 

On 01/12/2024 at 19:29, ThePog said:

Ah that software thing was the bit scaring me off...

On 01/12/2024 at 19:28, h4nd said:

 some mug

Sorted!

[GARDRB]

13 hours ago, kws said:

From what my friend said, who was running the same rails in his Corolla, you're pretty well limited to anything around the age of Fishnets or SR2/3 from something like a Civic/ DC2 Integra Type R. Anything newer, like Evo 5 onwards, DC5R, Accord Euro R etc will be the 4 bolt pattern. He was going to change to floor mounted buckles and use modern rails, but sold the car before that.

Awesome, that kinda confirms what I thought

[shizzl]

Was having a mighty sharn with an old chap today about street rods and the good ol days. Got me thinking.

 

does anyone still run ladder bars these days?

my brain is telling me they’d be ok for a nice little Coilover set up.

 

but are they junk compared to a modern 4 link?

[RXFORD]

Ladder bars are great for making cars go up on 2 wheels.

 

They don't allow  proper articulation, and also give alot of pinion angle change.

Definitely junk compared to a 4 bar, and its not much more work to set up a proper link.

[shizzl]

Old tech for a reason ae.

damn that would be a brick moment, atleast he missed the box though

[gibbon]

our elderly Toncon TIG-200 gave up this morning. Even with it set to 100 amps, and trying to arc directly to the ground cable, it could only produce a handful of weak sparks. is it worth pulling this sort of thing to bits and trying to fix? or straight in the bin?

makes me feel better because the last time I tried to use it I was producing even shittier welds than usual, now I can rightfully claim that the machine was on it's last legs

[mjrstar]

id at least try a different torch, lead and earth cable to rule them out,

[tortron]

My mig had the same symptoms 

Was the wire inside the machine where the earth lead connection is, had comeaway/worn away or something. Was enough to unwind a little and redo