For reference when referring to the rotor, that is the plastic carrier for the contact fingers, the PCB is the Stator and the knob would be the 'clicker plate' just like any rotary wafer switch assembly.
Okay when making it worse are you referring to the small sleeve or the PTFE under the circlip ?.
For the sleeve i disagree that any additional stress is being applied to the contacts or the PCB. The dimensions of it are carefully chosen by measurement to only
apply enough pressure to the plastic fingers of the rotor body to the PCB hole reducing only lateral free play ,(which in my opinion is excessive ), to a minimum without
adversely effecting the effort required to rotate. This mechanical change guarantees alignment of the switch contacts on the rotor with the PCB stator and how will this
introduce ant further stress on the contacts.
Now for the PTFE under the circlip, has anyone measured the distance from the top of the rotor body to the underside of the circlip to determine how much distance
there actually is ?. I will admit it has crossed my mind and yet I did not actually do it myself , so as soon as I can I will take the meter apart again I will attempt to get some
measurement done there and post back, as well as try the knob without the PTFE spacers to see if only the sleeve cured my issue or it is indeed needed to apply light pressure to the rotor.
If even that is actually happening with the spacers installed.
Indeed the fixes we have done for our own are for a bit of tinkering and not 'approved'. And of course I will use the redesigned assembly when it arrives.
But as I have clearly found on my meter the was a direct link to PCB flexure from only small movement of the probe inputs that caused major issues
on the ohm/diode modes of that switch position that it was completely unusable until I did my version of a fix and now in the interim the functions work.
(note that my 121 meters knob was quite 'wobbly' to start with! so I am not convinced its just the knob and not also the rotor slop at play here too.).
Now purely for my own edification I will see what effect the sleeve has without the PTFE packing. Is most surely not going to damage my meter to have a play
while I wait for the 'approved ' replacement part.
I hate to ask, but what is so special about this DMM???
One would think by all the posts in now THREE sticky threads that it was the 3rd coming, especially considering these threads are only 3 weeks old.
Who is the manufacture? I don't see it listed in that DMM thread thou that hasn't been updated in 8 months.
Now I have learned. O
Of course if there was specific info, other than some U-Boob video as to whom was making/selling this and a link where to buy it, it would of been apparent.
"EEVBlog" doesn't ring a bell as a importer or manufacture.
Indeed the fixes we have done for our own are for a bit of tinkering and not 'approved'. And of course I will use the redesigned assembly when it arrives.
But as I have clearly found on my meter the was a direct link to PCB flexure from only small movement of the probe inputs that caused major issues
on the ohm/diode modes of that switch position that it was completely unusable until I did my version of a fix and now in the interim the functions work.
(note that my 121 meters knob was quite 'wobbly' to start with! so I am not convinced its just the knob and not also the rotor slop at play here too.).
Now purely for my own edification I will see what effect the sleeve has without the PTFE packing. Is most surely not going to damage my meter to have a play
while I wait for the 'approved ' replacement part.
Gents, all of this is fine for the wobbly knob and rotor action. However it does not address the wear of the knob axis within the PCB. The gunk which was on my PCB tracks (or does it?).
Now purely for my own edification I will see what effect the sleeve has without the PTFE packing.
I forgot to mention that a couple of days ago I dumped the batteries out of a set top box remote control I need to return and was surprised to see that they were made by UEI. I wonder if the 121GW comes with a UEI battery?
For anyone interested in Dave candidly discussing the 121GW issues:
https://theamphour.com/377-debugger-vs-printeffer/
Spoilers: Dave chuckles over the irony of the slow resistance settling time and what he has said about other meters. He also noted that the slowness was introduced in a late firmware update and he noted that they should have had a formal list of tests to be done for each release.
I'm standing by for the US deliveries....
Can anyone provide info on what UEi have come up with to fix the wobbly switch and intermittent contact issue?
For anyone interested in Dave candidly discussing the 121GW issues:
https://theamphour.com/377-debugger-vs-printeffer/
Spoilers: Dave chuckles over the irony of the slow resistance settling time and what he has said about other meters. He also noted that the slowness was introduced in a late firmware update and he noted that they should have had a formal list of tests to be done for each release.
I'm standing by for the US deliveries....
I had a listen to it myself today, as still no word from Dave or UEi on the current state of the meter's repair and updated firmware!
Can anyone provide info on what UEi have come up with to fix the wobbly switch and intermittent contact issue?
For the third or fourth time now, when I know it's all done and dusted, you'll know.
This stuff doesn't take days to do, it can take weeks.
So I think that's most of the software issues now fixed, but we will not be dribbling out updates every few days and they solve an issue, there will be one big update that includes all the software bug fixes.
Getting people to re-flash the firmware 20 times in a month is NOT conducive to a high standard of testing - nor is it an appealing prospect to owners. It is also bad form.
Getting people to re-flash the firmware 20 times in a month is NOT conducive to a high standard of testing - nor is it an appealing prospect to owners. It is also bad form.Just look at popular PC forums on motherboards when these tons of whiners cried/cursed/begged etc for frequent BIOS update just for minuscule non critical bug.
While I generally agree with you, I disagree that firmware updates for this meter in its current state should be aggregated for months before being released.
1. The meter is essentially in a beta phase of release right now, so frequent updates and testing will help the manufacturer find and fix issues more quickly. Issues are expected to be the norm at this stage.
This stuff doesn't take days to do, it can take weeks.
While I generally agree with you, I disagree that firmware updates for this meter in its current state should be aggregated for months before being released.
... so frequent updates and testing will help the manufacturer find and fix issues more quickly.
Bring us along for the ride as it develops, so we can all learn from the experience.
IMO your selling this meter's attributes short by not showing the features off as they are fixed. I say more videos highlighting what goes on technically to rectify the bugs. Don't discount the tremendous interest in this product. Make these early shortcomings its strengths by highlighting the fixes. I would have thought this is a video bloggers dream opportunity!
Those who seem to want to know nothing about the meters progress and are more than happy to wait weeks without an update can just view the thread once a month or so. That way all forum members/backers and supporters of the kickstarter project are all catered for.
Food for thought, Dave?