[SS2S-Main] Re: Digital scale load-cell design / instrumentation
- From: monsieurboo@xxxxxxx
- To: sugarshot@xxxxxxxxxxxxx
- Date: Sat, 18 Jan 2014 19:36:08 -0500 (EST)
Richard's not the horn-tooting type, so I'll do it for him. This might be just
what you want to start with.
http://www.nakka-rocketry.net/hydlc.html
Cheers,
Mark L.
DC
-----Original Message-----
From: vicente Alvero Zambrano <vicente_alvero_14@xxxxxxxxxxx>
To: sugarshot <sugarshot@xxxxxxxxxxxxx>
Sent: Sat, Jan 18, 2014 4:59 pm
Subject: [SS2S-Main] Re: Digital scale load-cell design / instrumentation
I've thought about the possibility of using the brake pump of a car. We only
need a brake pump and pressure gauge. I think it would be an easy and
economical option, the record is visually take place (like pressure). The only
"downside" is to calibrate the system. What do you think?
From: m.bindhammer@xxxxxxxxxxx
To: sugarshot@xxxxxxxxxxxxx
Subject: [SS2S-Main] Re: Digital scale load-cell design / instrumentation
Date: Sat, 18 Jan 2014 22:48:12 +0800
Is the communication protocol of a kitchen/bathroom scale load cell analog or
digital? 2000N should be the max. what a bathroom scale could measure (approx
200 kg). Sampling rate would be interesting and important too. Most bathroom
scales are very slow. However, it is pretty easy to design according
electronics/data logger for it. You could do this embedded with a micro
controller and SD card, you don't need a PC.
Markus
From: vicente_alvero_14@xxxxxxxxxxx
To: sugarshot@xxxxxxxxxxxxx
Subject: [SS2S-Main] Re: Digital scale load-cell design / instrumentation
Date: Sat, 18 Jan 2014 13:41:23 +0100
maybe Richard, can design and build a load cell based on websites, and another
member of the electronic
From: vicente_alvero_14@xxxxxxxxxxx
To: sugarshot@xxxxxxxxxxxxx
Subject: [SS2S-Main] Re: Digital scale load-cell design / instrumentation
Date: Sat, 18 Jan 2014 13:36:17 +0100
I have not just knowledge of electronics, so this work should be made between
several members
To: sugarshot@xxxxxxxxxxxxx
Subject: [SS2S-Main] Re: Digital scale load-cell design / instrumentation
From: monsieurboo@xxxxxxx
Date: Sat, 18 Jan 2014 07:11:34 -0500
It's been a few years since discussion of these digital-scale load cells was
ricocheting around the rocketry forums. Naturally, I started by checking
Nakka's site -- he's got a very cool "built from scratch" strain-gage design
but I couldn't find one there that starts with a digital scale. But here's a
good starting point for what you're talking about. This one hooks up to a PC
with a "COM port" USB interface, and the author hand-rolled the electronics.
http://www.steeman.be/?p=192
Enjoy!
Mark L.
DC
-----Original Message-----
From: vicente Alvero Zambrano <vicente_alvero_14@xxxxxxxxxxx>
To: sugarshot <sugarshot@xxxxxxxxxxxxx>
Sent: Sat, Jan 18, 2014 3:54 am
Subject: [SS2S-Main] Re: Interesting Motor-Design Documents
Hi Mattias,
It would be great if you could you do this. I think the maximum thrust is
2000N, but better than Richard confirm it.
Vicente Alvero
From: mattias.lampe@xxxxxxxxxxx
To: sugarshot@xxxxxxxxxxxxx
Date: Sat, 18 Jan 2014 10:37:27 +0800
Subject: [SS2S-Main] Re: Interesting Motor-Design Documents
If you want to go even cheaper, load cells can be scavenged from cheap digital
kitchen/bathroom scales. It’s not too difficult to hook them up to a computer.
I can probably help with the electronics, but not so much with the mechanical
part.
What would be the maximum force to be measured?
Mattias
From: sugarshot-bounce@xxxxxxxxxxxxx [mailto:sugarshot-bounce@xxxxxxxxxxxxx]On
Behalf Of vicente Alvero Zambrano
Sent: Friday, January 17, 2014 12:47 AM
To: sugarshot@xxxxxxxxxxxxx
Subject: [SS2S-Main] Re: Interesting Motor-Design Documents
Instruments would be a gauge and load cell, right? but this must be commercial.
some sets is "cheap". with relative to a support, I think we would have
problems. that would be cheap.
http://aeroconsystems.com/cart/load-cells/
maybe we can also use the pressure gauge and load cell minisshot rocket.
Date: Thu, 16 Jan 2014 10:30:00 -0600
Subject: [SS2S-Main] Re: Interesting Motor-Design Documents
From: richard.nakka@xxxxxxxxx
To: sugarshot@xxxxxxxxxxxxx
To design/build the instruments to measure motor thrust and chamber pressure.
We would have to do this on a "tight" budget.
R.
On Thu, Jan 16, 2014 at 10:18 AM, vicente Alvero Zambrano
<vicente_alvero_14@xxxxxxxxxxx> wrote:
What kind of help with the instrumentation?
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