Got this off another site. Use at your own risk.
RCBS Chargemaster part 2
Finally got around to testing my software modified Chargemaster (CM). Testing conditions are as follows: 1) CM set for 28.3 grains 2) powder was V 133 3) used a Ohaus Navigator n00330 scale to verify CM results. 4) 50 charges were dispensed 5) after dispensing charge the CM scale was slightly disturbed and a new reading obtained.
Instead of typing each result I will outline results. Out of 50 charges....1 reread on the CM 28.4 instead of 28.3, all others read 28.3. Checking with the Ohaus, 23 showed 28.25, 18 showed 28.3, 5 showed 28.2, and 4 showed 28.35.
This is an improvement over the stock software setting. The results obtained were as actually shown, with NO charges disreguarded due to bumping table, apparent voltage variations (slight light dimming) occasional misplacement of pan on platform and several interested pets trying to help.
Stock unit showed a variation of +.1 to -.1, a .2 spread, leveling CM resulted in a improvement, however it still was not consistant enough for me.
To change settings 1) start unit, when it shows 0.0 press edit/mem key and the enter key at the same time. I changed the following variables to these settings: F_A to 070, M_A to 030, S_A to 006, W_F to 235, T_S to 004. MAKE ANY CHANGES AT YOUR OWN RISK, I WILL NOT BE RESPONSIBLE.
LongShot1
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East S.F. Bay
Aug 2004
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Quote: (Originally Posted by
lcbcp)
To change settings 1) start unit, when it shows 0.0 press edit/mem key and the enter key at the same time. I changed the following variables to these settings: F_A to 070, M_A to 030, S_A to 006, W_F to 235, T_S to 004. MAKE ANY CHANGES AT YOUR OWN RISK, I WILL NOT BE RESPONSIBLE.
I tried the procedure you describe, but my unit shows no "T_S" variable. I do have an "F_A", an "M_A", an "S_A", a "W_F", but no "T_S". After the "W_F", there are, in order, settings for "W_M", "W_S", "S_F", S_M", and "S_S"
mikecr
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Aug 2003
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He had typo'd is all.. It's W_S
lcbcp
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Tappahannock, VA
Dec 2003
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Nope, not a typo....there are several versions of software on these units. This is one reason I have been hesitant to post my results. On my unit the F_A, M_A,and the S_A are "downshift points" ie. to change from fast to medium speed at 7 grs out from final charge weight, set F_A @ 070....to change from medium to slow @ 2 gr out, set M_A @ 020, etc. On MY UNIT there are really 4 speeds, fast, medium, slow, and for lack of better term "stop and go". I do have the following variables.... T_F, T_M, & T_S, which relate to tube rotation speed, T_S regulates the slowest speed, by setting it lower you can allow the scale to catch up with powder dispensed better though at a cost of time. I also have what appears to be a secondary set of the F_A, M_A, S_A , which are identified as F_B, M_B, S_B that I am not sure of as to exactly how they relate in the scheme of things, but may relate to 2 other variables W_F and W_M, which seem to be a static type limit expressed in gr. ie 255 = 25.5 gr. Last variable is SAP, which I hope is not a joke by RCBS to indicate someone that has worked for app 10 hrs to figure out the above info, but my best guess at this point sets com port speed, 096 = 9600 baud. All setting interact with each other as to end effect, so be carefull.
lcbcp
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Dec 2003
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Bert, my guess is that '"S_F", S_M", and "S_S", correlate to my T_F, T_M, T_S or as I think of it Turn_Fast, Turn_ Medium, Turn_ Slow could also be easily be construed as Speed_Fast, Speed_Medium, Speed_Slow. At least this is how I would approach this issue. Change ONE variable and test results. Sort of like playing with a rifle but unlikely to result in a major face rearangement if wrong. List all variables available in order and look for patterns based on results of available info. Any computer based gismo can be best thought of as a self defined jig saw puzzle. Hope this helps. L C Brooke (lcbcp)
