[PSUBS-MAILIST] speed controllers

Tue Aug 29 06:12:51 EDT 2017

Hank.  we never get bored of sub videos, even if they are similar.....

On 26 August 2017 at 04:14, hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> David,
> Honestly I thought I was over doing the video's of Premier Lake, and
> everyone was getting bored.  Deep test Monday, for Gamma, will take
> pictures.
> Hank
>
>
> On Friday, August 25, 2017, 7:43:42 PM MDT, David Colombo via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hank, You don't need any evidence for the wife to see that you were not
> working on the house, but you should at least take photos to share with the
> rest of us subbers who are still working on our houses because our wives
> are watching us.
>
> Best Regards,
> David Colombo
>
> 804 College Ave
> Santa Rosa, CA. 95404
> (707) 536-1424
> www.SeaQuestor.com
>
>
> On Fri, Aug 25, 2017 at 5:27 PM, hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> My dive today was unexpected because I am supposed to be working on
> renovating the house and shop that we are moving into next summer.  I have
> decided that the house can wait because submarine adventures are more
> important. So there, lol.  I did not take pictures or video but it was
> picturesque with a flat  sunny lake and great visibility   because it has
> not rained in about two months.
> Hank
>
>
> On Friday, August 25, 2017, 6:19:31 PM MDT, via Personal_Submersibles <personal_submersibles at psubs.
> org <personal_submersibles at psubs.org>> wrote:
>
>
> Any pictures or video?
>
>
> Cliff Redus
>
> On Aug 25, 2017, at 6:52 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.
> org <personal_submersibles at psubs.org>> wrote:
>
> Alan,
> I am going back to switches for now and will get proper controllers over
> the winter.  Lucky for me I have back up travel motors that saved the day.
> Also my inflatable is an absolute dream!  can bump into the sub all you
> want.  Now I just hit the brakes and Gamma drifts off untethered off the
> trailer. Then I park the truck and hop in the inflatable to retrieve
> Gamma.  Nice!
> Hank
>
>
> On Friday, August 25, 2017, 5:45:29 PM MDT, Alan via Personal_Submersibles
> <personal_submersibles at psubs. org <personal_submersibles at psubs.org>>
> wrote:
>
>
> They should have DC brushless controllers down to a fine art.
> There are so many electric bikes & rickshaws over there.
> Also they are so dominant in the electric RC market that requires
> reliable DC controllers.
> Maybe Hank got some backyard manufacturer using parts from
> old TVs.
> I was told to over size my controller by about double.
> Buy a 3000W controller for a 1500W motor.
> Also the manufacturers get nervous when you talk about long
> wire runs from your battery bank to controller. I am not totally
> clued up on this, but have heard it said to add capacitors along
> the wire run & twist the wires together to avoid inrush current
> from the break down of the electric field in the wiring. The PWM
> would cause a constant building up & breaking down of the magnetic
> field & a  consequent surging of electricity into the input capacitors.
> I guess a way around this would be to place the controller as close
> as possible to the battery source & run long runs of wire to the speed
> control potentiometer & on switch.
> These days the controllers have all sorts of parameters you have to
> program in to them when they arrive. Gets very confusing!
> Alan
>
>
> Sent from my iPad
>
> On 26/08/2017, at 11:15 AM, Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.
> org <personal_submersibles at psubs.org>> wrote:
>
> I read a book about manufacturing in China which I found quite interesting:
>
> "Poorly Made in China" by Paul Midler.
>
> Gives some of the background explanation behind the lack of quality
> control.
>
> Sean
>
>
> On August 25, 2017 4:23:28 PM MDT, hank pronk via Personal_Submersibles <personal_submersibles at psubs.
> org <personal_submersibles at psubs.org>> wrote:
>
> Well I learned another lesson today.  I went for a very unexpected dive in
> Gamma today and both new speed controllers quit.  Don't buy electronic
> parts from China ! Ever!
> Hank
>
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