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| Rigol DS1054Z rotary encoder mod *works!* |
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| tooki:
:-DD If only... how many years did it take for them to fix the “pluses” typo? It was clearly a conscious (if stupid) decision to use a non-detented encoder to begin with, not a bug, so I don’t see why they’d change it. Rigol definitely does not have a reputation of being responsive to customers. |
| klausES:
The right choice would be to take one like the two new ones at the bottom left. Certainly the same people as before thought it was right to take one without detent at this point, (or you didn't want to annoy any of the thousands of older buyers now) ?!? :-X |
| klausES:
There are two options (outside, without opening the housing). The more effective of the two is the silicone ring on the inside of the shaft. See image. Version inside: It must have an exact mass, then it is put under "pressure" early on, at the very beginning of the pushing, and its deformation (since it cannot leave the V-shaped space) increases the friction between the shaft and the thickening of the shaft above and the fixed neck of the encoder to increase the friction from turning while pressing. Version outside: (There it is easier to try different diameter and tensions to test it). The ring may only have a slight tension without pressing (it should dampen the rotation "then" if only slightly) and when pressed it is forced to increase its overall diameter. This more tension also creates more friction and the shaft can be turned brake while pressing. Everything depends on the right dimensions and materials of these sealing rings. If these are selected correctly, braking works perfectly without the normal turning and pressing of the button being impaired. Inside it has to be soft silicone (easily deformable), on the outside there is also a rubber or better a Viton ring. I hope the translator doesn't build too much nonsense here... ::) PS. Silicone Ring inside = yellow Rubber or Viton ring outside = red |
| klausES:
This would have been my conversion of the original encoder (20 pulses) to 20 detent (pictures still in the early stages). Unfortunately, it is useless if the software of the new smd encoder board now evaluates the encoder "twice" per step. So work for free ... :-\ Before I throw in the scrap unfinished, I wanted to show you. |
| tooki:
--- Quote from: tooki on January 30, 2020, 02:06:39 pm ---From what I can tell, for everyone with a board using the 1:1 THT encoders, the optimal Alps part number is STEC11B13 (EC11, 20mm shaft, with button, 20 detents, 20 pulses; AKA EC11B20244), and the equivalent Bourns (which is an active part) is PEC11L-4120F-S0020 (PEC11L, 20mm shaft, with switch, 20 detents, 20 pulses). For those with a 2:1 SMD encoder board, it'd be one of the following Alps models: EC11J0924411 EC11J1524413 <-- probably this one EC11J0925403 EC11J1525402 Those differ in number of detents/pulses (# of pulses in red) and button travel (in green, 4=0.5mm, 5=1.5mm travel). My guess is that 0.5mm travel is probably the right one, but I don't know whether 9 or 15 pulses is better. AFAIK, either will work, just at different speeds obviously. Given that Bourns only makes this in a 30-detent/15-pulse version, my hunch is that the second one (in bold) is likely what Rigol is using, insofar as the Chinese clones will also probably be of the most widely available type. The equivalent Bourns part is PEC11S-9220F-S0015. --- End quote --- So I ordered a PEC11L-4120F-S0020 for my scope, and when it arrived, I was surprised to discover it's 5mm longer than the original. Turns out that on the plastic-shaft encoders, they include the encoder body in the shaft length, while on the metal-shaft ones, they don't! |O |O |O So when I went by the 20mm shaft spec on the 12mm plastic encoder people recommended earlier, it actually required a 15mm shaft in metal. I now have a PEC11L-4115F-S0020 on the way. But for the SMD models, I don't know what to suggest. Nobody seems to stock the 15mm shaft SMD version of the Bourns (PEC11S-9215F-S0015), and Alps doesn't even have a part number for a 15mm SMD version! I'll update the post accordingly. |
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