automatic water change

saco, did you have to turn it by hand with the 1a supply?

For reference that's about how mine runs on my 1a, it has no problem starting though. Will it run the same on the 4a once you get it moving?
 
Tickle said:
I think a brushed motor would be a little much. These are fairly large cans. When I did RC I believe I ran open stock and I could use a 18 turn motor. That thing would pump far more even with the gear reduction.
Click to expand...


I'm fine with whatever it does if it'll work. I can run it for thirty seconds if needed. High speed water change. :)
 
dread240 said:
saco, did you have to turn it by hand with the 1a supply?

For reference that's about how mine runs on my 1a, it has no problem starting though. Will it run the same on the 4a once you get it moving?
Click to expand...

On the 1amp I didn't have to turn it, but there was not tubing in it.
Once I put a load on it (tubing) I have to kick start it.

On the 4amp it runs the same if there is a load or not.
It does not speed up just stays at that barely moving speed the whole time.

I did try a 12v 2amp afterwards with tubing in it and it will start on it's own, but runs slow, not as bad as the 4amp, but slow.

I'll try to get a video of that too.
 
Interesting. Wonder why the smaller amp power supply will turn it better. Did you test the output voltage on them all?
 
Does it have anything to do with start position? Maybe the rollers are just positioned differently?
 
I believe they are positioned so there is always a roller touching the tubing. Helps prevent a siphon or back flow
 
The two pumps are in sync (rollers aligned) with each other too.
I've tried off sync (rollers staggered) and it does not make a difference.
 
I don't think so. I've tried the 1 amp and 4 amp multiple times and the results are always the same.

The 1 amp will spin after a kick start.
Looking at the 4 amp with the tubes in, it will not spin with a kick start.

I just took a video of the 2 amp and it will not spin under load even with a kick start.

12v 2amp wall wart

<iframe width="420" height="315" src="//www.youtube.com/embed/WrDgfVNdHuY" frameborder="0" allowfullscreen></iframe>
 
Did I miss something along the way in this thread? Why are you all trying to use Tubing that was not intended for a peristaltic pump?
 
Are you sure your wallwart is putting out the amperage it says it is? Ive seen em vary quite a bit from what they say.
 
zachts said:
Did I miss something along the way in this thread? Why are you all trying to use Tubing that was not intended for a peristaltic pump?
Click to expand...

What are you referring to?

Both of the tubing's I've tried have been intended for peristaltic pumps.
 
On the second note have any of you actually measured the current and voltage draw for the pumps on the different PSUs your trying to use? V.S. what the pump motor is rated for? I didn't see this anywhere in the thread, but I admit I skimmed thru pretty quick... It may be that the psu can't provide what is needed in the initial start up to kick start the motor under load. Or even under no load as in some of the videos posted......
 
Sacohen said:
What are you referring to?

Both of the tubing's I've tried have been intended for peristaltic pumps.
Click to expand...

A few pages back you all were discussing all sorts of different kinds of tubing to use, why not just use what was intended for the particular pump (santoprene as I recall, but memory's been slipping these days)
 
Nowhere does it actually state the amperage that the pump requires to run. Ive looked on the Barnett page and they have nothing about this motor. It just says 12v.
 
There is also several different variations of tubing these are made to run. The difference on the tubing would be the application in which its intended for ie food or chemicals
 
Sacohen said:
I went to McMasters' site and narrowed the search for peristaltic and soft (hardness) and 12 were returned.
I then went in and looked at the Shore rating for them and only listed the ones at Shore 56 (what we have now) or below.

There are 6 to choose from, I'm sure one of these will work.

Laboratory Clear Tygon PVC Tubing Shore 56 (the ones we tried)
High-Flex White PVC Tubing Shore 50
High-Flex Clear Tygon PVC Tubing Shore 40
High-Temperature Silicone Rubber Tubing Soft: Shore A50 or Very Soft: Shore A35
NSF 51 High-Temperature White Silicone Rubber Tubing Shore 50
High-Purity White Silicone Rubber Tubing for Peristaltic Pump Shore 50
Click to expand...

Is this is the post you were Telling about?

If so you will notice that these are all for peristaltic pumps.
 
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