Speedo out to drive DC motor

A forum for discussing applications and implementations of the MegaShift transmission controller code for the GPIO from B&G. This can control up to 8-speeds and 6 shift solenoids (plus a 16x9 table for controlling a PWM line pressure valve). It has manual and fully automatic modes (16x9 load x speed table), with under and over rev-limit protection, and full data logging of all inputs and outputs (among many other abilities). A TransStim to test your completed board is also available.
tobmag
Posts: 206
Joined: Mon Jan 02, 2012 4:22 am

Re: Speedo out to drive DC motor

Post by tobmag »

60% to 80%...
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tobmag
Posts: 206
Joined: Mon Jan 02, 2012 4:22 am

Re: Speedo out to drive DC motor

Post by tobmag »

and the last 90%-100% well cant get over 97% actually....
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tobmag
Posts: 206
Joined: Mon Jan 02, 2012 4:22 am

Re: Speedo out to drive DC motor

Post by tobmag »

And this is how the PC signal looks like, perfect....
Measured at the Trans Stim.
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Bernard Fife
Posts: 1696
Joined: Fri Apr 04, 2008 1:28 pm

Re: Speedo out to drive DC motor

Post by Bernard Fife »

tobmag,

Are these shot while shifting, or in a 'steady state'?

Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it." - George Bernard Shaw
tobmag
Posts: 206
Joined: Mon Jan 02, 2012 4:22 am

Re: Speedo out to drive DC motor

Post by tobmag »

Those are on a steady state
Bernard Fife
Posts: 1696
Joined: Fri Apr 04, 2008 1:28 pm

Re: Speedo out to drive DC motor

Post by Bernard Fife »

Okay, I will have a look on my bench shortly. Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it." - George Bernard Shaw
Bernard Fife
Posts: 1696
Joined: Fri Apr 04, 2008 1:28 pm

Re: Speedo out to drive DC motor

Post by Bernard Fife »

tobmag,

These scope shots are all on spare port SP1?

Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it." - George Bernard Shaw
Bernard Fife
Posts: 1696
Joined: Fri Apr 04, 2008 1:28 pm

Re: Speedo out to drive DC motor

Post by Bernard Fife »

Also, can you post the MSQ of the MShift settings you used to when you made these shots? Thanks!
"Never wrestle with pigs. You both get dirty and the pig likes it." - George Bernard Shaw
Bernard Fife
Posts: 1696
Joined: Fri Apr 04, 2008 1:28 pm

Re: Speedo out to drive DC motor

Post by Bernard Fife »

Tobmag,

I see a problem on the bench. The PWM works as planned - except that the off period isn't fully off (it fluctuates between off and on). That is leading to the 'jumpiness' you are seeing. I will dig into the code shortly to sort this out. Thanks for your patience on this - it's how the code gets fixed.

Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it." - George Bernard Shaw
tobmag
Posts: 206
Joined: Mon Jan 02, 2012 4:22 am

Re: Speedo out to drive DC motor

Post by tobmag »

Lance wrote:tobmag,

These scope shots are all on spare port SP1?

Lance.
All exept the last post that are on PC out put.
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