2020-08-24, 09:05 AM
(This post was last modified: 2020-08-24, 09:06 AM by jamos.tan@gmail.com.)
(2020-08-23, 08:58 PM)rastam4n Wrote:(2020-08-23, 07:51 PM)jamos.tan@gmail.com Wrote: Thanks, I don't have a hydraulic motor yet, but my current H-bridge can go to 43A, but I've configured Pypilot to max 20A.
I didn't yet know btw that the amps setting you describe would have such an effect, this probably means that I need to set my small Autohelm st4000 tiller to a much lower setting. My presumption was, just set it as high as it "can" go for testing, not yet having properly set it to the best value for power saving.
I was planning to use a hydraulic as main and only for emergency use a tiller, still browsing on the internet for a second hand somewhere.
So in case of main autopilot failure I wanted to switch to the secondary tiller, but, use the same H-Bridge driver for it. So I was thinking of adding a hardware switch which could make this possible.
I have this exact setup but in my case I have a hydraulic motor on my main and an electric cable steer on my "kicker" motor. I have a Dual pole dual throw switch which selects between the main and the kicker. They actually make one that fit right in my switch panel and it matches my other switches.
Nice! So you have a switch on the digital pins that Sean describes? And then also a switch on both poles of the h-bridge, so one direction goes to your hydraulic and one to your kicker? Would love to see your setup!
(2020-08-24, 02:43 AM)seandepagnier Wrote:(2020-08-23, 07:51 PM)jamos.tan@gmail.com Wrote: Thanks, I don't have a hydraulic motor yet, but my current H-bridge can go to 43A, but I've configured Pypilot to max 20A.
I didn't yet know btw that the amps setting you describe would have such an effect, this probably means that I need to set my small Autohelm st4000 tiller to a much lower setting. My presumption was, just set it as high as it "can" go for testing, not yet having properly set it to the best value for power saving.
I was planning to use a hydraulic as main and only for emergency use a tiller, still browsing on the internet for a second hand somewhere.
So in case of main autopilot failure I wanted to switch to the secondary tiller, but, use the same H-Bridge driver for it. So I was thinking of adding a hardware switch which could make this possible.
think of the max current setting as a software fuse. So it won't help you save power or anything like that, it will trigger if the motor stalls, so it needs to be low enough to trigger without stressing the drive too much but high enough that it won't trigger unless you hit the end of travel or the drive is jammed or the wires get shorted somehow.
Wow thanks! That really clarifies it!
