Doser 3 Pumps Upgrade Kit / pump head getting stuck

[max42otp]

Greetings,

My two Doser 3 upgrade kits were shipped on 2025-07-22, then in a couple of days I received them and installed both kits within the last week of July.
Prerequisites were met:
- new GCC software downloaded
- new FW flashed into devices
- settings for Doser 3 pump heads were configured & applied

Initially, upon both Doser 3 kits have been installed, merely just about three pump heads (out of 8 heads total) were able to spin smoothly & finish a 360-degree rotation in a single run.
I left the upgraded Dosers connected and running the configured dosing schedule, just for monitoring and observation purpose.

Then, a new GCC with new Firmware came out, again flashed that new FW into both Dosers.
Continued in observation.

As of today, just about three months after putting both Doser 3 upgrade kits into service, I'm able to observe that seven pump heads (out of 8 heads total) are able to spin smoothly & finish a 360-degree rotation in a single run.
Which is a noticeable improvement.
But the last pump head still getting stuck in rotation (the last pump head in the linked video).
https://youtube.com/shorts/5hisdZegcf0

Now, I'd like to ask for advice:

Has anyone else encountered these Doser 3 pump heads getting stuck & unable to finish a single 360-degree rotation cycle.
If so, has anyone been able to figure out how to resolve/mitigate these stuck pump heads.


Thanks for sharing any possible insights.

[beananimal@gmail.com]

Greetings,

My two Doser 3 upgrade kits were shipped on 2025-07-22, then in a couple of days I received them and installed both kits within the last week of July.
Prerequisites were met:
- new GCC software downloaded
- new FW flashed into devices
- settings for Doser 3 pump heads were configured & applied

Initially, upon both Doser 3 kits have been installed, merely just about three pump heads (out of 8 heads total) were able to spin smoothly & finish a 360-degree rotation in a single run.
I left the upgraded Dosers connected and running the configured dosing schedule, just for monitoring and observation purpose.

Then, a new GCC with new Firmware came out, again flashed that new FW into both Dosers.
Continued in observation.

As of today, just about three months after putting both Doser 3 upgrade kits into service, I'm able to observe that seven pump heads (out of 8 heads total) are able to spin smoothly & finish a 360-degree rotation in a single run.
Which is a noticeable improvement.
But the last pump head still getting stuck in rotation (the last pump head in the linked video).
https://youtube.com/shorts/5hisdZegcf0

Now, I'd like to ask for advice:

Has anyone else encountered these Doser 3 pump heads getting stuck & unable to finish a single 360-degree rotation cycle.
If so, has anyone been able to figure out how to resolve/mitigate these stuck pump heads.


Thanks for sharing any possible insights.

I am having the same issue, I upgraded 8 of the 12 heads, and several are still sticking even after breaking them in.
current firmware is 1.55

Also - I have set one of them that does not appear to be "sticking" to dose 500ml per day at 1ml per minute. This is ~8.33 hours.

I get a dose of around 200-300 ml, not 500ml.

The head has been calibrated an SLOW 0 speed numerous times, using a graduated cylinder AND a 0.001 lab balance.

I am at a loss and looking for answers.

[Ahorne]

possibly it is more of a mechanical problem judging by the video and noise, the pump head four is likely to slip or block, whereby the motor shaft rotates properly,

do a cross exchange, swap the head four with a position that rotates properly and see if the error goes with , if you have the dosing head down then start to try if the motor shaft rotates properly briefly the motor without shaft....

If the error goes along, disassemble the blue head shield and see if the dosing hose drags on the housing, if not then check the gears for visible traces, and the connection from shaft to dosing head....