Hi! Roger.
I exclusively used a Ohaus digital scale.
For me it was easy since I decided how much of combined epoxy I wished
to make at one mix (Not more than say approx. 25gm because of exotherm
likleyhood).
Zero the unit with my mixing cup and mixing stick on the bed. Carefully
pour say 5gm of hardener in, follow by pouring in epoxy to make up to
25gm this way, so long as you know your 5X table, is foolproof. For
subsequent mixes following immediately on I used the same mixer cup and
stick but re-set the scale before starting each mix and be sure to
re-mix any dregs of the original mix with the new mix. So you are using
as clean a new mix every time.
I'm quite sure someone is going to tell me I was incorrect by method but
there you have it.
Have fun
Regards
Bob Harrison G-PTAG (Europa Kit 337 originally 3300 Jabiru now with
Rotax 914 and intercooler 600 hours)
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Roger Lowe
Sent: 31 January 2008 02:53
Subject: Europa-List: Epoxy Measuring - Balances vs Digital Scale vs
Ratio Pump
Hi, I've purchased a partially complete Europa a little over a year ago
and had to put it storage until my garage/workshop was re-vamped in
order to build the kit. It is now to a point to where I can start moving
my kit into it and start working on it.
I have question about the different devices used to measure the epoxy
and wondering what most builders have done in the past. The cheapest of
course is to make the Europa mechanical balance which should be no
problem (is it quick and easy to use during a layup?) but I'm leaning
towards either a Ohaus / Sartorius digital scale with a resolution of
0.01gm (do I need that much precision or can I get away with a lower
cost 0.1gm unit?) OR a ratio pump like a Glenmarc Portionator MBT-JR
---From A/S which is the most expensive of the all the options (is it worth
the cost for ease of use?).
I live in Canada so I will be using Aeropoxy resin (100:27 by weight or
3 to 1 by volume).
I would appreciable any feedback/experience that you have that would
help me make up my mind!
Thanks, Roger
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