Tuning RCBS scales

[pbranthwaite]

Other than the Targetmaster chap, does anyone else tune these scales or, can it be done at home?

[miroku6.5]

i am on the same quest
i found this chap as the target master man is too bizzzy at the moment [6 months]
Scott Parker in the USA it means shipping to him tuning and return shipping
his email is online already and he has a face book acc
vld223@yahoo.com

[Turnup]

I've never come across this before.

What is "tuning" and what does it achieve?

[miroku6.5]

tuning your beam scales, just gets them as accurate and sensitive a possible so even one kernel of powder
will move the arm off zero and they will be as repeatable as possible and will always return to your set zero as long as you haven't moved
them, most good makes of beam scales are ok and give good results ,but if you get a bit anal about accuracy then you need to 100% trust your scales

[Turnup]

tuning your beam scales, just gets them as accurate and sensitive a possible so even one kernel of powder
will move the arm off zero and they will be as repeatable as possible and will always return to your set zero as long as you haven't moved
them, most good makes of beam scales are ok and give good results ,but if you get a bit anal about accuracy then you need to 100% trust your scales

OK. My RCBS scales are exactly like that with no tuning - lucky? - or has recent quality declined? I think I bought mine in about 1990.

[pbranthwaite]

Another thing done is an extended pointer to make it easier to read

[223AI]

Another thing done is an extended pointer to make it easier to read

I've thought about doing this myself as on the tuned scales I've seen it appears to just be a needle attached to the beam.

[pbranthwaite]

So have I, but if the calibration is thrown out it might be a problem. If however its a case of confirming with a check weight and adjusting the ballast in the pan holder then I might give it a try

[miroku6.5]

as far as i am aware when a pointer/needle is used the weight in the base of the pan is adjusted while a known weight[say 50gn] is in the pan and the the beam is set to 50gn then what ever weight is added is then put in the base of the pan.

then the knife edges are homed to a sharp edge with no burrs under a magnifying glass , then each weight increment on the beam scale is checked for accuracy and adjusted to suit [slight sanding/burnishing or enamel paint added ]
this is just from what i have read so far

[BrianS]

I don't want you to get excited but there used to be a Ohaus shop in Bournemouth. I've not been that way for a while but I'll investigate further.

http://ohausscales.org.uk/ might be a good start.
or here http://www.ohausscalesandbalances.co.uk/

ATB
Brian

[loiner1965]

Another thing done is an extended pointer to make it easier to read

put a magnifying glass in front of pointer too