Usernam Invalid
New member
Can you go into more detail on how you did this
Jebao Dosing pump thread.
- Thread starter evolutionZ
- Start date
I used a raspberry pi and a couple circuits that I learned how to make to run small motors online and then I coded up a website. About 40% of the code I found online and hacked it apart, the other 60% I wrote myself.
The Raspberry Pi has a Wifi dongle on it so it is programmable via an IP address.
The Raspberry Pi has a Wifi dongle on it so it is programmable via an IP address.
garwood
New member
dependent on sg and temp
ZKicka4000
New member
Bought one of these and have been testing it for a few days now, curiosity got the best of me as I suspect many of the higher priced brands/models were made of the same components. I've found that the one I have is incapable of dosing the 1ml minimum as the specs say. As a matter of fact, it seems to dose 1ml more than I have it set to no matter what I set it at. Figured maybe if I set it to 0 it would dose 1ml, but nope, it doesn't dose anything. Sending it back for replacement and if the replacement is the same, I guess I'll buy a higher priced doser. Anyone else have this issue?
So you're saying after you calibrated it, it always doses 1ML more than the requested amount?
Why do you need such precision - to the single ML?
ZKicka4000
New member
I don't necessarily need that type of precision, its more of an observation. If it were capable of dosing 1ml at a time, then I'd be inclined to dose 1ml an hour rather than say, 2ml every 2 hours. I'd be willing to live with it if necessary, but something is clearly wrong with the unit, which adds to my skepticism of reliability.
And yes, it was about 1ml more after calibration with every pump. But I've only tested this theory with about 6 or so dosing values.
And yes, it was about 1ml more after calibration with every pump. But I've only tested this theory with about 6 or so dosing values.
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chercm
New member
I had the same problem with the pump not keeping its prime and getting air in the lines. I contacted the EBAY seller and they sent me a link to this video
https://www.youtube.com/watch?v=BgeMKU-YYo4
They show you how to dissemble the pump and put it back together again. All of the pumps they sent me were put together wrong like an earlier post stated. When I inverted the wheels they worked fine. They must know they are still shipping these out wrong if they have a video. It was kind of sneaky because when they take their's apart they are assembled correctly and leave it up to you to figure the wheels are upside down in the pumps they send you.
Paul
https://www.youtube.com/watch?v=BgeMKU-YYo4
They show you how to dissemble the pump and put it back together again. All of the pumps they sent me were put together wrong like an earlier post stated. When I inverted the wheels they worked fine. They must know they are still shipping these out wrong if they have a video. It was kind of sneaky because when they take their's apart they are assembled correctly and leave it up to you to figure the wheels are upside down in the pumps they send you.
Paul
I reported this possible problem with the reversed roller wheel back on page 4 Post#98. It is now just a few days shy of a year since I reversed the roller wheel and I haven't had any failed/slipping or back siphoning of any of the three heads that I currently use in either dosing or calibrating.
I don't know if the person in the youtube video that you refer to is someone connected to Jebao or not but yes, in that video the pump head is installed correctly when it is first opened and it is re-installed the same correct way.
BTW, in the diagram of parts that came in the box with my doser, the wheel is shown incorrectly installed.
If anyone is interested, below is the video that I found which gave me the idea of reversing the installation of the roller wheel.
https://www.youtube.com/watch?v=9szzHkiefuM
I don't know if the person in the youtube video that you refer to is someone connected to Jebao or not but yes, in that video the pump head is installed correctly when it is first opened and it is re-installed the same correct way.
BTW, in the diagram of parts that came in the box with my doser, the wheel is shown incorrectly installed.
If anyone is interested, below is the video that I found which gave me the idea of reversing the installation of the roller wheel.
https://www.youtube.com/watch?v=9szzHkiefuM
Thanks for confirming that after inverting the wheels you had no more problems. I'm glad to see that my fix was not a one off case. I thought it might have been an improperly trained assembly person but it looks like it might have been a wider spread problem. Specially when you consider that they published the instructional diagram with the incorrect head assembly.
I want to add that, trying to fix the problem with check valves is only masking the problem. If there isn't a tight seal between the rollers and the hose (which would cause draining of the hose) then there could possibly be additional issues like inconsistent calibration and dosing.
I want to add that, trying to fix the problem with check valves is only masking the problem. If there isn't a tight seal between the rollers and the hose (which would cause draining of the hose) then there could possibly be additional issues like inconsistent calibration and dosing.
miatawnt2b
New member
I purchased the MT-01 doser two years ago from fish-street. It worked fine until a few days ago when pump2 decided to continuously run dumping 1l of calcium 2 part in my tank. It's only set to dose 24ml/day. The only way i can turn off the pump motor is to set to manual mode, or program the pump to dose 0ml/day.
So... it looks like I need a new dosing pump. Who has the v2 of the new jebao unit and do you like it? What's the specific differences with V2 and V1?
-J
So... it looks like I need a new dosing pump. Who has the v2 of the new jebao unit and do you like it? What's the specific differences with V2 and V1?
-J
Usernam Invalid
New member
Well I finally just checked the wheels on the dosing heads and all 4 were installed incorrectly. I inverted all 4 removed my previously installed check valves and recalibrated each head.
Side note this Jebao dp-4 dosing unit has been in constant use for over a year with the improperly installed heads. Fingers crossed it continues to operate as intended now the heads have been installed correctly.
Side note this Jebao dp-4 dosing unit has been in constant use for over a year with the improperly installed heads. Fingers crossed it continues to operate as intended now the heads have been installed correctly.
Deefish714
New member
I have a question I recently got one of these units. but when I actually start using it there will be a lot more airline then when i calibrated it. Will this affect the amount dosed? Should I re calibrate when I install into my cabinet. I figured it would because of the amount of tube. Is it bad to have the dose pump and dosing container all the way on the other side of the cabinet and run tube maybe 40 inches to were its going in my sump?
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There is no need to prime the lines. Once the unit goes through a few dosing cycles it will fill the lines and from then on they will be primed.
But if you insist on priming the lines, you can do so by doing a manual dose. I don't know if many know this feature exists because I never see it mention.
1 - Press left or right arrow once.
2 - Select pump head desired (left/right arrow.)
3 - Press and hold the back button (Button in the middle of the four arrows.) doser head will dose. Release when you want to stop dosing.
4 - When done press "Esc" to exit.
But if you insist on priming the lines, you can do so by doing a manual dose. I don't know if many know this feature exists because I never see it mention.
1 - Press left or right arrow once.
2 - Select pump head desired (left/right arrow.)
3 - Press and hold the back button (Button in the middle of the four arrows.) doser head will dose. Release when you want to stop dosing.
4 - When done press "Esc" to exit.
By the way, even though Deefish714 was asking about dosing after the unit was calibrated (and that is what my earlier response was addressing,) I do want to make the point that DURING calibration the lines must be totally primed. You can use the manual mode that I outlined in my prior post to fully prime it all the way out to the end of the output line.. After that you can start calibration. If there is air in either side of the pump head lines calibration will not be accurate.
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