:::RHMT::: Real Home Made Turbo

General Category => Hybrid/Tech => Topic started by: Conceptz-X on September 16, 2009, 09:40:59 PM

Title: need stepper motor control ideas.
Post by: Conceptz-X on September 16, 2009, 09:40:59 PM: ok, got 2 holset VGT's want to use the stock stepper for the VGT function.

3 phase motor. I think. I'd like to control it with a PWM circuit or a hi-lo stitching circuit. Possibly the PWM could be attached to an internal capactior to buffer and steady the signal. Not sure how to go about all of this.

I know I will need a power, ground, and control input circuits. but to make something to run it in and out according to the signal is where my knowledgabilities of electronics fail.

Any ideas?

pic of motor with board removed
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fc4.ac-images.myspacecdn.com%2Fimages02%2F25%2Fl_14cfe3f786ee450eb3a56a8c61ccb0bb.jpg&hash=910e5873cf17a7ae91ea3873e10f4669cfe4a1ef)
Title: Re: need stepper motor control ideas.
Post by: Conceptz-X on September 16, 2009, 09:42:06 PM: yes, that is a snake in the upper left, I was holding my albino corn snake when I snapped the pic.
Title: Re: need stepper motor control ideas.
Post by: Joseph Davis on September 18, 2009, 07:07:23 AM: I doubt that's 3 phase. Scan both sides of the control board.
Title: Re: need stepper motor control ideas.
Post by: Conceptz-X on September 20, 2009, 08:06:03 AM: its a 6 phase motor then. I was just trying to figure out if I could do somthing like this, if not I will simply use a 1/8 scale R/C servo

will post pics later of the board.
Title: Re: need stepper motor control ideas.
Post by: Joseph Davis on September 20, 2009, 12:17:56 PM: Meh, I really hate calling a DC-based H-bridge inverter drive 3 phase. If it's anything if the sort.

Post pics of the board NOW, or I drive to AL and kick your MR2.
Title: Re: need stepper motor control ideas.
Post by: Conceptz-X on September 20, 2009, 01:22:42 PM: (https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fc1.ac-images.myspacecdn.com%2Fimages02%2F57%2Fl_1627fb83b24c47aea12d2b54b38fd5a4.jpg&hash=7518f76fad3ef31002f8d498978575adb1c443b6)
There appeared to be 3 proximity sensors for the motor, they broke upon removal

(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fc1.ac-images.myspacecdn.com%2Fimages02%2F51%2Fl_227238d20ba942138cc2b479e89635fc.jpg&hash=e763fa38c0f678e7051bb77f57914c15483c79ab)

Unmolested it looks like this:
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fc3.ac-images.myspacecdn.com%2Fimages02%2F61%2Fl_8382d9647ed141d1900f611c3914d9a2.jpg&hash=03ad4298c2bd6a26d8de84af4e41f50736ce16be)
Title: Re: need stepper motor control ideas.
Post by: Joseph Davis on September 20, 2009, 03:40:10 PM: How about usable pictures? Ones where I can make out the components.
Title: Re: need stepper motor control ideas.
Post by: Conceptz-X on September 20, 2009, 03:53:16 PM: (https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fc2.ac-images.myspacecdn.com%2Fimages02%2F89%2Fl_ef9d2a70e2584b3783e7506a17643fc1.jpg&hash=a165c22aba221005fc434ff250337c5d0c6101e8)

(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fc3.ac-images.myspacecdn.com%2Fimages02%2F44%2Fl_18ac9f1e2d074ad48e3dfa9bff17168a.jpg&hash=ae4436fc44d992ecfa047dd270d1bf58d3d58f20)
Title: Re: need stepper motor control ideas.
Post by: Joseph Davis on September 20, 2009, 03:56:38 PM: How about you use the scanner on the fax/scan/printer all-in-one unit at your workplace, and bring me something I can see. It's hard reversing a board without being able to figure out wtf the chips are or having half a clue where the traces go.
Title: Re: need stepper motor control ideas.
Post by: Conceptz-X on September 20, 2009, 04:04:44 PM: my understanding is the ECM uses CAN to communicate with this motor.

the board is about 4 or 5 layers, not many visable traces
Title: Re: need stepper motor control ideas.
Post by: Joseph Davis on September 20, 2009, 05:45:43 PM: Communication protocol is what it is.

What chip directly controls the motor is something else entirely.
Title: Re: need stepper motor control ideas.
Post by: colt45 on September 21, 2009, 03:46:22 AM: so whats a stepper motor?
Title: Re: need stepper motor control ideas.
Post by: Kain on September 29, 2009, 03:47:46 PM: Quote from: colt45 on September 21, 2009, 03:46:22 AM
so whats a stepper motor?

like a pregnant hooker.
Title: Re: need stepper motor control ideas.
Post by: Conceptz-X on September 29, 2009, 07:35:16 PM: I'll just use a servo to simplify it. it'll look RHMT. I got other shit to occupy my time and thoughts right now
Title: Re: need stepper motor control ideas.
Post by: bigdaddyvtec on September 29, 2009, 08:07:20 PM: Im confused are yhou referencing like a basic astamp to run the thing or the actual "on board controller"
Title: Re: need stepper motor control ideas.
Post by: Joseph Davis on September 29, 2009, 08:14:39 PM: Quote from: bigdaddyvtec on September 29, 2009, 08:07:20 PM
Im confused are yhou referencing like a basic astamp to run the thing or the actual "on board controller"

No, he said he'd use a servo. :mexi:
Title: Re: need stepper motor control ideas.
Post by: Conceptz-X on September 30, 2009, 12:44:05 AM: Quote from: Joseph Davis on September 29, 2009, 08:14:39 PM
Quote from: bigdaddyvtec on September 29, 2009, 08:07:20 PM
Im confused are yhou referencing like a basic astamp to run the thing or the actual "on board controller"

No, he said he'd use a servo. :mexi:

I'll just use a 1/8 scale R/C high torque servo to control it from the EMS. The project has time. Getting my ass divorced and out from this shithole is my current priority. Later when I have the time/money, expect some VGT craziness.