Author Topic: WH40 3D Printed Height increase  (Read 4510 times)

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Offline zinz

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WH40 3D Printed Height increase
« on: July 02, 2022, 09:31:44 AM »
I printed an attachment to increase the height of the border of the WH40.
Time will tell if this decreases the water splash in heavy rain.
Sofar I just put it on top and it stayed on there even with heavy wind.

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stl file for printing. For the filament I used PETG. This should work with the outside conditions.
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« Last Edit: July 02, 2022, 09:33:21 AM by zinz »

Offline Daali

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Re: WH40 3D Printed Height increase
« Reply #1 on: July 02, 2022, 10:32:25 AM »
Excellent print! 

I did the same but made the side walls a little thicker so I could heat insert some straightened out paper clips for bird spikes.  It's held up for 6 months so far in the sun.

Offline mcrossley

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Re: WH40 3D Printed Height increase
« Reply #2 on: July 02, 2022, 12:14:45 PM »
I cannot understand why Ecowitt do not extend the factory unit in similar manner - though as a single moulding.
Mark

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Re: WH40 3D Printed Height increase
« Reply #3 on: July 02, 2022, 12:35:49 PM »
Who knows, they might, or come out with a different unit.
I would think the later if there have been any changes made to console firm wares for the WH40.

Pretty sure it all has to do with production runs, etc. but I really don't know.

I wish the OP had 2 units to compare, one with the augmented funnel and one without.

If so inclined , I would use one , as I do have 2 of the WH40s (near side by side), and can compare.

So zinz , if you want to send me one to test real time, I can :)


Edit: For the most part, my 2 WH40s come with a few percentage points full scale regardless of rain intensity here when compared to my manual stratus. Yes there are variations of course.

« Last Edit: July 02, 2022, 12:39:13 PM by Rover1822 »
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Online Rover1822

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Re: WH40 3D Printed Height increase
« Reply #4 on: July 02, 2022, 12:47:46 PM »
Also Daali, if you want a comparison test. I can do that

I have too many tools as it is so not printing my own.
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Online Gyvate

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Re: WH40 3D Printed Height increase
« Reply #5 on: July 02, 2022, 02:56:43 PM »
I'll get me one printed and will compare. I have enough data from the past (from the WS90 tests) to be able to compare even with only one WH40.
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Offline giusCB

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Re: WH40 3D Printed Height increase
« Reply #6 on: July 02, 2022, 06:02:18 PM »
The correct offset for WH40 is 1.022 (every tip is 0.102mm)
With original calibration it has -2.2% (Underestimate)
Anyway, very nice job!
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Online Gyvate

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Re: WH40 3D Printed Height increase
« Reply #7 on: July 06, 2022, 06:28:36 AM »
I cannot understand why Ecowitt do not extend the factory unit in similar manner - though as a single moulding.
Hi Mark (and everybody else)
below an excerpt of a reply to a recent email sent to Ecowitt in this regard
Quote
....
I agree this forum is very good and informative regarding our products.

Concerning the funnel accessory part, it is a good idea, and I have been used this by myself with a simply made one.
I have passed this to our engineering team for their consideration. We should make it an accessory part, at least, available in case people need one.
Best Regards
Ecowitt Support Team

 
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Offline Daali

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Re: WH40 3D Printed Height increase
« Reply #8 on: July 06, 2022, 08:13:51 AM »
I definitely mis-remembered how "tall" I made mine.  I'll take a picture today.  I only used pla and its held up fairly well in direct sunlight for almost 9 months I believe.  I need to replace the extruder mount on my printer so I can print again!

Offline DelChard

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Re: WH40 3D Printed Height increase
« Reply #9 on: July 07, 2022, 06:30:38 AM »
I have both a WH40 and a WH69, I tend to follow WH40 posts.

From this post (https://www.wxforum.net/index.php?topic=39166.msg413780#msg413780), my understanding is that Ecowitt have attempted to compensate for the splash out within console firmware which stymied some of the potential 'fixes' that were being muted at that time.
Hence, I never modified my WH40 cone.
The one issue that can't be compensated for, is the failure of the tipping spoon to keep up during high rain rate.

By reducing splash out during these high rainfall events, the spoon will still be swamped, if not more so.

It's difficult to be certain from the picture, but it looks as if the printed collar has a larger diameter.
In which case a reduction factor will be required.

I wait for results from various rain rates, with interest

Offline giusCB

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Re: WH40 3D Printed Height increase
« Reply #10 on: July 07, 2022, 06:52:53 AM »

is there a trace somewhere of this algorithm?  :?:
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Online Gyvate

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Re: WH40 3D Printed Height increase
« Reply #11 on: July 07, 2022, 08:31:39 AM »

is there a trace somewhere of this algorithm?  :?:
not sure - it has already been speculation in that post 2 years ago ...
the WH40 kept underreading at high rain rates

I personally will observe its behaviour in parallel with the WS69 rain gauge.
If the underreading improves at high rain rates / high wind speeds, the rim extension is a valueable add-on.
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EDIT: you have to look closely to see the differences - a daily breakdown within a month would probably be more obvious
see: https://www.wxforum.net/index.php?topic=43139.msg448702#msg448702
« Last Edit: July 07, 2022, 03:46:13 PM by Gyvate »
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Offline zinz

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Re: WH40 3D Printed Height increase
« Reply #12 on: July 07, 2022, 08:31:56 AM »
I have both a WH40 and a WH69, I tend to follow WH40 posts.

From this post (https://www.wxforum.net/index.php?topic=39166.msg413780#msg413780), my understanding is that Ecowitt have attempted to compensate for the splash out within console firmware which stymied some of the potential 'fixes' that were being muted at that time.
Hence, I never modified my WH40 cone.
The one issue that can't be compensated for, is the failure of the tipping spoon to keep up during high rain rate.

By reducing splash out during these high rainfall events, the spoon will still be swamped, if not more so.

It's difficult to be certain from the picture, but it looks as if the printed collar has a larger diameter.
In which case a reduction factor will be required.

I wait for results from various rain rates, with interest

Currently on holidays, so I can't compare with manual measurements. No I measured 179mm on the original cone as the inside diameter. The inner diameter of the collar is the same size. Sadly I don't have equipment yet to measure more accurately.

Offline DelChard

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Re: WH40 3D Printed Height increase
« Reply #13 on: July 07, 2022, 10:39:03 AM »
I have both a WH40 and a WH69, I tend to follow WH40 posts.

From this post (https://www.wxforum.net/index.php?topic=39166.msg413780#msg413780), my understanding is that Ecowitt have attempted to compensate for the splash out within console firmware which stymied some of the potential 'fixes' that were being muted at that time.
Hence, I never modified my WH40 cone.
The one issue that can't be compensated for, is the failure of the tipping spoon to keep up during high rain rate.

By reducing splash out during these high rainfall events, the spoon will still be swamped, if not more so.

It's difficult to be certain from the picture, but it looks as if the printed collar has a larger diameter.
In which case a reduction factor will be required.

I wait for results from various rain rates, with interest

Currently on holidays, so I can't compare with manual measurements. No I measured 179mm on the original cone as the inside diameter. The inner diameter of the collar is the same size. Sadly I don't have equipment yet to measure more accurately.

 [tup]I did say it was difficult from the photograph.
Incidentally, I measure mine at 178,2/178,5

Online Gyvate

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Re: WH40 3D Printed Height increase
« Reply #14 on: July 07, 2022, 11:17:08 AM »
so we have a potential difference of about 2.24 cm2 (224 mm2) of rain capturing surface
or 0.1 % surface difference between 178.2 mm and 179.0 mm diameter.
I consider this rather negligible - as it's far below possible accuracy with this device

And - admittedly the pictures suggest a conical shape rather than a cylindrical shape... which most likely comes from the angle the photo was taken
« Last Edit: July 07, 2022, 11:20:48 AM by Gyvate »
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Offline Daali

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Re: WH40 3D Printed Height increase
« Reply #15 on: July 09, 2022, 08:52:20 AM »

my now dead WH40 lol.  I definitely misremembered making it a lot taller.

Offline slybarman

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Re: WH40 3D Printed Height increase
« Reply #16 on: August 20, 2022, 07:24:07 AM »
was a conclusion / consensus ever reached as to whether adding the taller rim was helpful or not?

Online Gyvate

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Re: WH40 3D Printed Height increase
« Reply #17 on: August 20, 2022, 07:41:59 AM »
I have had only one event with stronger rain/winds ever since I mounted mine two months ago and it seems to work. Will need some more and even much stronger rain/winds events to confirm. Unfortunately we have had very little rain in the last months - not only for such tests. Nature is suffering strongly from the lack of rain here.
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Offline WXDA

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Re: WH40 3D Printed Height increase
« Reply #18 on: October 24, 2022, 07:50:47 AM »
I've been watching this thread with interest since replacing my WH65 with a WH40 about 3 months ago. I suspected the WH40 was underreporting based on comparing it with 2 local stations so I installed a manual gauge next to it. After 7 rain events with varying intensities of rainfall I've concluded it is underreporting by an average of 0.44mm, so not a massive amount. The most it has underreported per rain day/event is by 0.9mm.

I've just got the extension @zinz kindly uploaded 3D printed and it's now sat on top of the WH40 awaiting rainfall. I'll report back my findings to see if it makes a difference to my setup. I've not adjusted the gain on my console.


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Offline WXDA

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Re: WH40 3D Printed Height increase
« Reply #19 on: November 06, 2022, 02:39:40 PM »
Small update: we’ve had a lot of rain of varying intensities since I applied the extension and so far it appears to be working well. In the first 2 weeks the 0.45mm average deficit between the WH40 and my manual gauge was cut to 0.25mm.

We then had a storm which knocked my manual gauge sideways. While I had the spirit level out fixing it I also levelled the WH40 funnel instead of relying on the in-built bubble level which I always thought made it look off (it did). After a few more rain events since levelling, the difference between WH40 and manual is averaging 0.1mm. Today we had 18mm of rain with a rate of 22mm/hr at one point and it was exactly the same as the manual. Previously I’d have expected it to be at least 1mm short.

We have further rain forecast for this week so I’ll keep a further eye on it.


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Offline Bashy

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Re: WH40 3D Printed Height increase
« Reply #20 on: November 06, 2022, 10:29:34 PM »
Hi folks, had some heavy rain this month, regards to the WH40 vs Davis VP2, the WH40 overreads by a fair amount, e.g. WH40 67.5mm - Davis 38.6mm I have never touched the WH40 and i am sure i haven't touched the Davis which tracks fairly well with the manual 4in, all are mounted on the same half pallet fence about 2 or 3ft off the ground and 3ft apart.
Kind regards
Bashy

Online Gyvate

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Re: WH40 3D Printed Height increase
« Reply #21 on: November 07, 2022, 02:05:41 AM »
I'd say that something is fishy then with either the Davis or the WH40 ... (or both ?)
Did you give the inside of the WH40 rain gauge a full cleaning ?
The maximun deviation my WH40 would show over longer daily rainfall countings with changing rain rates - compared to two manual gauges - was so far never more than 1 mm ...
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Offline Bashy

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Re: WH40 3D Printed Height increase
« Reply #22 on: November 07, 2022, 07:09:06 AM »
I'd say that something is fishy then with either the Davis or the WH40 ... (or both ?)
Did you give the inside of the WH40 rain gauge a full cleaning ?
The maximun deviation my WH40 would show over longer daily rainfall countings with changing rain rates - compared to two manual gauges - was so far never more than 1 mm ...

Hi, yeah, I thought that too, so I checked and both are clean, both tippers move easily too, I thought they were 2ft apart but thats prob about 8in at most

EDIT: Today WH40  1.7mm  vs Davis 0.8mm

I noticed the Davis is on the piss somewhat, lets say the tipper is east to west, the lean was north to south, not sure if that could be the cause, I have levelled it up some but it needs more work on that, but its certainly a lot better.
« Last Edit: November 07, 2022, 09:02:19 AM by Bashy »
Kind regards
Bashy

Offline Khurram

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Re: WH40 3D Printed Height increase
« Reply #23 on: July 10, 2023, 10:28:41 AM »
Will this fit the rain gauge in the sensor array WH65B (the sensor array that came with my Ambient 2902C weather station)?

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Re: WH40 3D Printed Height increase
« Reply #24 on: July 10, 2023, 11:03:57 AM »
Will this fit the rain gauge in the sensor array WH65B (the sensor array that came with my Ambient 2902C weather station)?

No.

The WH65 has a smaller funnel, also it doesn't have the same problem that the WH40 does due to a different angle of the funnel. An extension IMHO is not needed for the WH65
Ambient:
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  PM 2.5(2)
  WH31B(2)
  WH40E
  WH31P
EcoWitt:
  GW1100
  GW1000(4)
  WH31(2)
  WH57
  WH51(12),
  WH40
  WH5360B
  WN34S
  WittBoy WS90 + GW2000
  WS90 (other one) + GW1100
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