bcochran
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Posts posted by bcochran
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On 7/12/2024 at 9:01 AM, Ian_Grant said:
Bruce, now we're getting somewhere with diagnosing the problem. Don't quit just yet!!
Either the ESC -to-Rcvr plug is the wrong way round (which doesn't seem to be the case in your photos) or somehow its BEC (battery eliminator circuit) cannot supply the Rcvr with 5V, or 6V, whichever.
Two simple steps to take:
1) With batteries connected to ESC, use a voltmeter to measure across the red and blk/bwn leads of the Rcvr plug. Verify voltage and that the red lead is +ve. Now you know the BEC is at least working under no-load condition.
2) If that looks ok, plug into the Rcvr (ensuring that -ve is at the outside edge of the Rcvr) with no servo. Now use the voltmeter to measure across the centre and outside pins of any one of the accessible Rcvr connectors (BATT, the rudder channel). If no voltage then the BEC isn't working under load. Again, the centre pin should be +ve.
Finally, if this is the case, get a little battery holder for four AA batteries and solder a standard 3-pin RC connector at its wire outputs (best to include a little switch). Plug this into the Rcvr's BATT connector, BUT BEFORE powering up, cut the red centre lead of the ESC-Rcvr cable; you DO NOT want it clashing with the external battery pack. This must work with at least one of your Rcvrs or I'll eat my hat.
Here is an example battery holder:
Ian,
Is it usually the case that someone in the r/c boat hobby has to do all that?
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My M.A.C.K, ESC looks like it is ok with just the battery plugged in to it. When i plug it into the receiver it stops running.
I don't have the desire or motivation to keep trying things and getting disappointed. The equipment I have and the setup I have just doesn't work! I have 4 different ESCs. nothing is working with either. I shouldn't have to try this and try that. I should be able to buy some equipment follow the directions and things work. I have battery operated G scale trains that I installed the battery electronics and they work. I have DCC ho model trains and I install the decoders and program them and they work. But this R/C boat has kicked my ***!
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22 hours ago, Ian_Grant said:
Bruce, I got a reply from Mtroniks. He repeats my suggestion to try running on a lower voltage (ie one battery) to eliminate over-voltage shutdown from the theory list although he says it should run nonetheless. His contact info is at the end should you wish to discuss.
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Hi Ian,
Sorry you sound to be having an issue with our products.
First of all, yes, a Viper Marine40 should be ok running the two motors you describe.
Secondly, the Viper controllers will run on Lead Acid, NiMH or NiCAD cells. NOT Lipo cells.
Lastly the Viper controllers do not have over voltage lock out so I doubt this is the problem you are seeing.
What voltage are you trying to run it on?
Have you tried it on a lower voltage and it works?
If you can answer these questions for me, I’ll see if we can get you going again.
I hope that we have helped you with your enquiry, if we have, would you mind clicking on the link below to add a review on google? We don’t have many reviews and it would help us with our online profile. If not, no problem at all!
Best regards,
Paul Kenningley
Mtroniks Ltd
Tel: 0044(0)1943 461482
I am running on two 7.4 battery packs
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This is the first ESC that I bought from M.A.C.K. It looks like it is working. The video shows the fan spinning.
I'll hook it up to the receiver tomorrow. Stay tuned -
This is the latest ESC that I bought. The first time I flip the switch it worked as it should for 30 seconds then shut down. The fan was spinning and a led in the bottom was lit.
As the video shows it will not work.
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On 7/5/2024 at 7:03 PM, Ian_Grant said:
From what I am reading now, Viper ESC quality seemed to decrease a few years ago and many people switched to MACK, which is what you bought originally. There's no way all four ESC's are bad; it's something else. By the way, I PM'ed you to say that the MACK spec sheet lists up to 12-cell NiMH so they should be ok with what you have.
I tell myself that it can't be all ESCs are bad. If I connect the batteries to the ESC and the fan does not spin it looks to me that it is not working right. and when I plug them into the receiver there is no control of the servo and the LED on the receiver stars blinking on and off, I have assumed the ESC is bad. What else can cause that? I think I will call M.A.C.K. tomorrow and talk to him.
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On 7/4/2024 at 3:27 PM, Ian_Grant said:
Bruce, not to deluge you with messages and confuse you; I an not satisfied with input received about ESC input voltages so I have sent a query to the horse's mouth, Mtroniks, themselves. Response TBD.
I haven't tried anything yet. I don't know what to do about getting the right ESC. I look on line but get confused.
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14 hours ago, Ian_Grant said:
Bruce
That looks correct.
In other news, I must apologize for my Viper recommendation. Although the datasheet says NiMH and NiCAD can be used, it is really designed for lead-acid batteries. I got the following feedback from Harbour Models:
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Hi Ian,
The Viper line of speed controls are only compatible with SLA (sealed lead acid) batteries and can handle the extra voltage when fully charged.The ViperHV line can handle 12-24V and is compatible with SLA, LiPO, NiMH, NiCad.The TIO line is made for 6-12V for use with LiPO, NiMH, NiCad. - This is the line you should be using for the description of your battery described.Sincerely,
Nick Jacalone
Harbor Models
626 963 4591-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------A couple of RC club members that use Vipers use them with gel-cell lead-acid batteries.I think it would be worth a quick test with one battery to see if we're barking up the right tree.The fact that you are taking the time to help me is much appreciated.
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7 hours ago, Ian_Grant said:
Bruce
This makes me wonder how you are connecting your two batteries to ESC's. You want to have your batteries in series; I assume they each have a 2-pin connector? You need to have the +ve of one connected direct to the -ve of the other. The second pin on each connector should connect to the ESC. This would require some wire snipping and splicing, but you'll want to keep the 2-pin connectors on the battery leads whole for charging. Don't you need to make up a special harness to achieve this, or did Big Mack supply something? Here is a picture. Upper half shows the electrical connection you want. Lower half shows how to do it without cutting your battery wires - make up the harness circled. Do you have something like this?
I have a harness that takes care of that. The connectors are keyed so I don't think I can connect them wrong. The battery plugs are male.The Y harness to the ESC is male and the plugs to the battery are female.
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Is it normal for r/c boat owners to have this much trouble ?
it is hard for me to accept that 4 ESCs that I have tried do not work. Yet there is nothing mysterious about my boat. Just two 7.4 volt battery packs, an ESC, a receiver and a servo. All connections to ESC and batteries are keyed. I followed instruction on where to plug the ESC and servo to the receiver. Batteries are charged.
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9 hours ago, Ian_Grant said:
Bob,
Looking way back in your post #7, your original ESC model can be powered by 6-12 cell NiMH so the ESC input voltage (of those original ESCs, not the Viper, should not be a problem.
I will let you know what I find out about the Viper. I've asked the guys in my RC club, and Harbour Models.
Also, look at pg 19 of your GT3B manual "D/R Function". By any chance could you have set the channel 1 and 2 outputs to 0% ie no servo travel, while playing around with programming? The factory default is 100% which might explain why everything originally worked. ??
Similarly, pg 17 programs "end point adjustment" which if accidentally changed to 0% could also set servo travel to none.
I would guess that I am doing something wrong since I have trouble with all the ESCs. I just don't know what. AS to the Viper, it has only one battery connection. How do I go about using one battery? I do feel guilty about the GT3B because I was trying to set the end points when things started to go bad. Also when the servo tried to work with the other ESCs it barely moved then quit moving.
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29 minutes ago, Ian_Grant said:
Bruce,
A brushed ESC should be able to run two identical brushed motors in parallel as long as their combined current draw is within ESC limits.
Have you tried leaving the motors unconnected to see if the rudder works then?
It bothers me that the ESC fan does not turn, unless it only runs when the ESC is getting warm, maybe?
Again I urge you to try using a separate 6V battery to supply the Rcvr at the BATT terminal to see if the rudder then works. If so then pick one of your ESCs, cut the power wire on its Rcvr link, connect the motors, or just one motor at first if you like, and see if everything works now that RCVR supply is NOT the ESC.
I will try what you suggest. Way back when every thing worked the fan stayed on.
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19 hours ago, Ian_Grant said:
Bob I wish I could help bit I have no idea why your rudder servo at least isn't working.
I have a new ESC and I am going to connect everything outside the boat. My guess is the servo will work!
I spoke too soon. The new ESC does not work. It is outside the boat, connected to the receiver and batteries. I turn on the switch, the receiver comes on as it should. I turn on the transmitter and the LED of the receiver lights as it should The fan on the ESC does not turn and the servo does not move.
I don't now what to try next. I think I need a dual motor brushed 40amp ESC
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17 hours ago, thibaultron said:
What type of battery? If lead acid, they charge to about 14. Other types I don't know.
I have two Ni-Mh batteries each rechargeable to 7.4 volts.
My new ESC will be here this week and it says they are for 6 to 12 volts. So I will be putting 14 volts to the ESC. I was wondering will doing that cause trouble.
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If my ESC says it is for 6-12 volts and my batteries put out 14 volts, is that a problem?
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I think I may be screwing up the ESCs by having them too close to the motors
Another ESC is on the way. I am going to test it outside the boat first.
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3 hours ago, ccoyle said:
Well, that is a huge bummer. I don't know anything about RC, so I can't help, but I do know how frustrating it is when things don't work as expected. I'm sorry this has been such a trial for you!
I am going to try one more thing. I will hook up the batteries ESC and receiver outside the boat
Outside the boat my receiver and transmitter LED works as they should. The viper ESC.did work but stopped working. The servo moved a bit then quit. I have no clue how to make it work. I am sending it back to the seller.
I am glutton for punishment and ordered one last ESC like the first ones. When it comes I will hook it up outside the boat. Since I keep trashing ESCs maybe the motors are the problem. Or maybe I have zombie apocalypse fingers.
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Well the receiver woks correctly now but the transmitter has no control of servo or motor. The servo did move the first time I turned on the transmitter but now it does not move. Maybe I have to fiddle with the transmitter a bit.
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11 hours ago, thibaultron said:
Just wire both motors to it, reversing the wiring on one, if you have counter rotating propellers. Certainly your motors don't draw more than 20A each, unless you want to melt the boat.
I would have to connect the motor terminals together and plug the ESC to one motor correct?
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It looks like I bought a ESC for a single motor.
I’m not having any luck getting this boat in the water
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On 6/24/2024 at 9:41 AM, MAGIC's Craig said:
Good morning: I would be delighted to have that opportunity. Please let me know when it works for you.
Craig
I am waiting for a new ESC which is supposed to get here on Saturday. Most likely it would be the following week. Watch this log and I will say it he might before.
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Does it matter if a Ni-MH battery pack is 3300 mil or 5000 mil ?
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54 minutes ago, MAGIC's Craig said:
No. We're in Los Osos
Maybe if my boat ever runs right, you could meet me at Laguna Lake for her maiden voyage.
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1956 Chris-Craft 54' Constellation by bcochran
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Ian and all of you who helped me here thank you very much. It isn't often that I've had so many people put as much energy into helping me with my projects.
Sorry to say I have moved on from R/C boats. It just hasn't been any fun trying to get this thing to run right. Maybe in the future I will get the boat off the shelf again and try what Ian has suggested and it will work right.