Ohaus 10-10 repair

mctrigger

mctrigger

CGN Regular
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Location
Southern Alberta.
I have a really nice Ohaus 10-10 scale that struggles to give consistent reads. Gets hung up. I cleaned the agates and the knife edges look clean and sharp.

I think I’ll send it for repair. Did some googling and found that ml tests in Calgary does Ohaus repair. I’ll fire them a email. Has anyone used them? Perhaps there is someone better. Any advice would be great.
 
have you checked the groove with magnet behind it (where the copper blade runs through) for cleanliness?
A tiny filing of metal stuch to the magnet can make readings inconsistent.
 
bertn said:
have you checked the groove with magnet behind it (where the copper blade runs through) for cleanliness?
A tiny filing of metal stuch to the magnet can make readings inconsistent.
Click to expand...

This has been my experience also with my 5-0-5. I did what the OP has mentioned, cleaned the knife edges and agates, but the scale was still "sticky", for lack of a better term.
I took the magnets out and cleaned them as a last resort, and it was fixed.
I don't really understand why, since there was nothing touching the blade on the scale arm.
The only thing that I can think of is that the metal stuck to the magnet becomes an extension of the magnet itself, so you have a stronger field in one spot than others.
 
Chilly807 said:
This has been my experience also with my 5-0-5. I did what the OP has mentioned, cleaned the knife edges and agates, but the scale was still "sticky", for lack of a better term.
I took the magnets out and cleaned them as a last resort, and it was fixed.
I don't really understand why, since there was nothing touching the blade on the scale arm.
The only thing that I can think of is that the metal stuck to the magnet becomes an extension of the magnet itself, so you have a stronger field in one spot than others.
Click to expand...

Good to know. I’ll try that too.
Turns out ml test won’t repair it as it’s discontinued so That’s that.
 
About a year ago my balance beam (an older Redding) was getting a bit slow to react and/or didn't react to one or two kernels the way it used to, so I did some googling - I think there may have been a thread or two on here as well. It wasn't until I read about the "stuff between the magnets" and cleaned that out that the problem went away.

Like Chilly said, there was nothing I could see that was touching the blade, but for whatever reason, that was the fix that did the trick.

Best theory: maybe there was some fine dust/lint that I couldn't see which had been trapped by the metal in the gap and that was what was actually adding the friction into the system?

(I've printed a dust cover to try to keep this from happening in the future.)
 
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