anyone tried to using Jebo WP40?

Yes, you manually control the intensity of the flow by changing the voltage with the knob.
Click to expand...

Is this safe for the pump? Are there any concerns in regards to damage to the pump doing this?

I'm excited I found this post. I've been waiting FOR EVER for Seio to release their wave pump. May have to get this Jebo instead!
 
Skinnysloth said:
Yes, you manually control the intensity of the flow by changing the voltage with the knob.
Click to expand...

Skinnysloth, do you know if the dimmer you are suggesting uses the PWM circuitry? Since the dimmer is used before the controller, I will be concerned with the effect on the controller, not the pump because the pump can handle PWM.
 
Yes... I like the idea of this LED Dimmer. If it works, that looks like the easiest resolution to flow control.

Tagging along
 
SimonSKL said:
Skinnysloth, do you know if the dimmer you are suggesting uses the PWM circuitry? Since the dimmer is used before the controller, I will be concerned with the effect on the controller, not the pump because the pump can handle PWM.
Click to expand...

Ok, I certainly do not want anyone to damage their controller using what I suggested. I do not have the knowledge to say whether it is safe or not. Here is what the inside looks like. It appears to use a PWM to adjust the voltage.

qqbz81.jpg


I will, however, pose a question to anyone with more expertise than myself to answer. Isn't the switching power supply (the power adapter) using the same on/off switching to regulate the voltage that gets supplied to the controller?
 
Yes, but 12-24 volts only slows it down and is within the operating range listed on the device. Less than 12 volts "may" cause a problem. The ideal place to put the POT/Dimmer would be between the controller and the motor, then less than 12 volts wouldn't be a problem there.
 
amutti said:
Yes, but 12-24 volts only slows it down and is within the operating range listed on the device. Less than 12 volts "may" cause a problem. The ideal place to put the POT/Dimmer would be between the controller and the motor, then less than 12 volts wouldn't be a problem there.
Click to expand...

Ok, what you're saying is, the pwm isn't inherently unsafe, just the voltage range it controls from 0 to 24v. I used the 0-24v dimmer because that was the only thing I had lying around. So a 12-24v dimmer (pwm) between the power supply and controller would be ok?
 
Skinnysloth said:
Ok, what you're saying is, the pwm isn't inherently unsafe, just the voltage range it controls from 0 to 24v. I used the 0-24v dimmer because that was the only thing I had lying around. So a 12-24v dimmer (pwm) between the power supply and controller would be ok?
Click to expand...

Exactly. I think the controller is designed to operate between 12-24V. A dimmer that drops the voltage all the way to zero will not be a good thing for the controller unless you can find a way to limit the dimmer not to drop below 12V.
 
Skinnysloth said:
Ok, I see. I used the 0-24v dimmer because that was the only thing I had lying around. So a 12-24v dimmer (pwm) between the power supply and controller would be ok?
Click to expand...

Well, that's still to be seen, but it is within the operations specifications. I think the concern is that the controller needs power and once you go below 12 volts (in order to slow the pump) you might be depriving the controller of adequate voltage. My guess is that it isn't a big deal and though it may not work at 1 volt or 2 volts you're not going to break it by under driving it . . . maybe there is a bad sweet spot . . . it's unlikely.
 
If you figure out where 12V is under the load and mark the knob as a reference then would that take care of under powering the controller.
 
So this is why there was talk about these pumps. Subbing so I can find this later...after I sell my MP40 for $400. LOL
 
amutti said:
Well, that's still to be seen, but it is within the operations specifications. I think the concern is that the controller needs power and once you go below 12 volts (in order to slow the pump) you might be depriving the controller of adequate voltage. My guess is that it isn't a big deal and though it may not work at 1 volt or 2 volts you're not going to break it by under driving it . . . maybe there is a bad sweet spot . . . it's unlikely.
Click to expand...

Just for clarification, you don't need to go below 12v to slow the pump. There's a decrease in flow as soon as you start decreasing from 24v.
 
As Dennis mentioned earlier... why wouldn't one of these
pwm1_zps8a326adb.jpg
work put inline between the controller and the pump with the controller set on W1 or W2 mode (basically a constant speed) and have the controller attached to the PWM part of this and controlling the speed/mode like that?

dartier said:
As Simon pointed out, putting a PWM before the controller will impact the power supply to the controller. Probably not a good idea as the components now have to deal with a supply that is turning on and off really, really fast.

The place to put an external PWM is between the pump and the controller as Floyd did. If you wanted to go that route and only need 5V PWM support. go to ebay and search "dual h bridge L298N". This should give you plenty of results for boards around $4 that will handle 2 pumps and accept a 5V PWM signal.

Dennis
Click to expand...

*sorry for the ginormous picture... tried resizing... photobucket wasn't cooperating.
 
markywmson said:
As Dennis mentioned earlier... why wouldn't one of these
pwm1_zps8a326adb.jpg
work put inline between the controller and the pump with the controller set on W1 or W2 mode (basically a constant speed) and have the controller attached to the PWM part of this and controlling the speed/mode like that?

*sorry for the ginormous picture... tried resizing... photobucket wasn't cooperating.
Click to expand...

I just tried one, and it wouldn't spin the pump. This was the one I tried. (link for reference, sorry)

http://www.ebay.com/itm/DC-12V-24V-...785?pt=LH_DefaultDomain_0&hash=item1e66d5e551

The PWM Frequency might be a factor that needs to be measured from the controller.
 
This is probably an obvious answer, and I'm completely wrong here, but I thought all the PWM did was regulate the voltage in and voltage out. Why wouldn't the 24v passing through said module, with the PWM attached to the controller, be modulated by your controller, thus controlling the pump?

Again, I'm sure this is a dumb question, I'm just trying to understand this.
 
Don't bother ordering the tunze wide flow shield. It's too small. The regular Jebao one has the same size exit as well. No need for it.
 
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