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Construction Equipment Tech Hydraulics, Electronics, General Engineering, ect in constr equip |
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ESC controlling the pump?
Does anyone have a link to running the hydraulics using an esc? I assume you would use 3 mixes (on a front end loader) to the esc channel? or is it more simple than that?
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Scott "No load is too Small" |
#2
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Re: ESC controlling the pump?
Hi Scott,
One solution is to use a mixer. Whenever you use a hydraulic function, the mixer is sending a signal to the ESC. But this solution needs one channel. Unfortunately I do not have a link how to program the mixer. Other solution is to use electronic hydraulic switches (eg. Servonaut BMA or Brixl Oeldruckschalter - Sorry both sites are in German). Both systems are between the receiver and the hydraulic servo and can check four (4) servos. Whenever there is s signal to the servo the module is switching on the hydraulic motor. At both systems you can adjust a time period the motor is running after the last signal to the servo. Hope this is what you was looking for. Cheers, Markus |
#3
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Re: ESC controlling the pump?
Im using some cheap 30A ESCs from hobbyking.com (they are originally made for aircrafts).
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Emil G | MFZ Blocher Fendt 926 | RC4WD Volvo EC480 excavator | Carson LR 634 | Kenworth 6x6 hauler | Kenworth 6x6 dtrk My channel: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Construction site on Facebook: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Pictures on Instagram: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. |
#4
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Re: ESC controlling the pump?
Scott,
On my Wedico ADT instead of using ESCs I used this receiver controlled switch: http://www.hobbyking.com/hobbyking/s...idProduct=8833 First I tried using 1 of the above switch. Using a DX8, programmed 2 mixes (steering to switch and dump to switch). The issue with this is that you CANNOT have both of mixes turned on at the same time (when you do, the 1st mix makes the 2nd in operable). What I did to make it work was to program the first mix into flight mode 1 and the second mix into flight mode 2. But this meant I always had to toggle between the flight modes. The solution I found was to install 2 of the above switch, plugged into 2 separate channels. Programmed 2 mixes, steering to switch 1 and dump to switch 2. Now the hydraulic pump only turns on when I activate the steering and dump channels. I also tried cheating - installed 1 switch - plugged it in to 2 separate channels using a 'Y' (2nd lead was only the signal wire). Didn't work...back fed signal....caused the whole thing to glitch. Albert |
#5
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Re: ESC controlling the pump?
Thanks Markus, the servonaut switch sounds great if you can even set how long it runs since the last signal.
Egronvold, thanks for the info. Thanks Albert, that is interesting that one mix cancels another. Lots of great info here! I'll see what I can come up with using all of this.
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Scott "No load is too Small" |
#6
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Re: ESC controlling the pump?
Hey aseejr, Question? Can you put diode's in the signal lines, for channel isolation, and
try the mixing again. Later, Neil#2 aka doodlebug. |
#7
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Re: ESC controlling the pump?
I am using this Banebots ESC/mixed with all my functions so the pump only runs when activated by the selected swithch
http://banebots.com/pc/ELECTRONICS/BB-0309
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Giving up is not an option!!! Rob |
#8
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Re: ESC controlling the pump?
Quote:
I'll head to our local electronics store this weekend. Albert |
#9
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Re: ESC controlling the pump?
Hey aseejr, I don't think the voltage rating has to be higher than 12 volt's on the high side spec's. Just a brain cramp for your "y" harness. Hope it help's! 1N914?, hope my memory is correct, the package should have the spec's on the back.
Later, Neil#2 aka doodlebug. |
#10
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Re: ESC controlling the pump?
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Ben |
#11
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Re: ESC controlling the pump?
Hey Ben, just one esc, but controlling it is the trick, aseejr is playing with a "y" mixing harness. Hope to hear on the result's soon! Some of the guy's have radio's that do the mixing. And well, I'm still learning too.
Later, Neil#2 aka doodlebug. |
#12
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Re: ESC controlling the pump?
As for the Leimbach system, it seems there's little difference in strength when it comes to the pump's speed. Here's a little test I did yesterday: http://www.youtube.com/watch?v=aqNTPp1g4pE
__________________
Emil G | MFZ Blocher Fendt 926 | RC4WD Volvo EC480 excavator | Carson LR 634 | Kenworth 6x6 hauler | Kenworth 6x6 dtrk My channel: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Construction site on Facebook: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Pictures on Instagram: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. |
#13
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Re: ESC controlling the pump?
Yes, you'll be producing pressure almost instantly when the pump starts to move, but you won't have full flow till its up at full speed. In the interest of saving battery juice, both the switch controlled and ESC controlled pump are good options. Could think of the ESC/wixed as a load sensing system that only pumps whats, needed, when needed which will also help with heat generation (so will the switch controlled). Being that the valves are variable flow, the switch controlled should give the best performance. Meaning the valve spool position is more of a linear relation ship to the speed of the cylinder being moved, where as with a varible speed pump and a variable valve, the relationship is more arc'd.
The best IMHO, and not sure if possible, would be to have the pump shutoff when not being used like the switch does, then when called for it ramps up speed, such that say 1/4 of stick movement and its at full speed. Would still give you some really slow movement for detail stuff but a more predictable movement at anything over 1/4 stick.
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Jeff |
#14
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Re: ESC controlling the pump?
Great demo Jeff. Could you educate me (us) as to how I (we) would "wire" that in with the 4 servos I will be using? Does that require mixing?
Ben |
#15
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Re: ESC controlling the pump?
That I'm not sure how to do yet. Can channels be mixed in a non 1:1 ratio?
So far the nicest switch I see is the Brixl one. Has programmable delay before shutoff. http://www.brixlelektronik.de/oeldruckschalter.htm
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Jeff Last edited by pugs; 04-24-2011 at 12:14 PM. |
#16
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Re: ESC controlling the pump?
Quote:
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#17
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Re: ESC controlling the pump?
I guess most computer radios can do that.
__________________
Emil G | MFZ Blocher Fendt 926 | RC4WD Volvo EC480 excavator | Carson LR 634 | Kenworth 6x6 hauler | Kenworth 6x6 dtrk My channel: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Construction site on Facebook: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Pictures on Instagram: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. |
#18
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Re: ESC controlling the pump?
Hey Ben, shoot me a PM and tell me exactly what you are trying to do. I think i have an idea of your goal. Maybe I can help ya. Also what radio are you using?
Rob
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Giving up is not an option!!! Rob |
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