So would it seem that a series of pulses raises the speed?
Sounds a little crude?
The typical T.M. controller ramps up the rpm, when the command is initiated.
Most now use PWM for speed command and have done away with the analogue pot.
Not really wise to disconnect and reconnect the motor, especially if there is a load attached.
The nicer version of boards is the MC2100 series, if you can find one.
Max.

 

So would it seem that a series of pulses raises the speed?
Sounds a little crude?

Correct, it needs a lot of pulses to get the motor up to max speed.
Treadmill motors are often used for wood lathes or sanding disks or drill presses. So there would be no load on disconnecting and reconnecting the motor.
I have found newer control boards, and one works fine on my lathe. Uses a 25K pot to set the speed, then break/make the voltage to the pot to stop the motor and restart it at the preset speed.

 

For a treadmill, a string of presses on a "faster"button makes perfect sense because it will not suddenly speed up. And likewise, a string of pulses on the "slower" button will slow the rate a bit with each push.
The perfect device to create those pulses for other applications would be an incremental encoder, perhaps 20 pulses per revolution. It will need a bit of steering logic to send the pulses to the correct input, faster or slower, depending on which way the encoder is rotated.

 

I have found newer control boards, and one works fine on my lathe. Uses a 25K pot to set the speed, then break/make the voltage to the pot to stop the motor and restart it at the preset speed.

Is this a MC-60 board?
If so there is a resistor that can be removed in order to resume speed on restart.

 

For a treadmill, a string of presses on a "faster"button makes perfect sense because it will not suddenly speed up. And likewise, a string of pulses on the "slower" button will slow the rate a bit with each push.

The more sophisticated versions have a micro in the control console as well as on the motor board.
They automatically ramp up or down when started or with a speed change.

 

MaxHeadRoom - you certainly are acquainted with the treadmill controls!
"Is this a MC-60 board?
If so there is a resistor that can be removed in order to resume speed on restart."

I really do not know if the board I used on my lathe is an MC-60. Forgot to make notes before encasing it. Just know it used a pot to control speed.
Which resistor would you remove to modify the start up?

Don't know what model of board this current project is, only quoting the numbers on the PCB [900176/75(2) KING]. And that it needs pulses to control speed. The motor does not have the overheat sensor in it.

So I wonder if a 555 timer could be used to control the speed pulses? Here's my idea of how it might look. I haven't calculated what speed it would like, so no values for the resistors or capacitor.

 

If in fact the board requires a series of pulses, (as opposed to PWM), it may be worth experimenting along those lines.

 

CyberBoy did you ever get an answer to your question about the treadmill motor controller? I found your post because I had an identical problem, with a control board that sounds much like yours. A Free Spirit treadmill T325/335/30520/30521-110V, made in 2005. The control board is labelled 900176/75(2) KING.
I had found the motor, controller and frame - but minus the display board.

Ssplay board. A light duty switch was used to achieve the same thing.
2. A pulse of GND to FAST or SLOW sets the new motor speed. It requires repeated contacts to raise or lower the spe

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Whether this man's answer is correct or not has nothing to do with the fact that he is genuine and a wonderful person. My hats off to you and thank you for who you are as a person. You are directing your response at the question and answering the post, unlike all the other established politicians here who care less about addressing the actual question aside from the other wanna bees who resort to threats of various shapes and colors. Including but not limited to...." don't mess with things you know nothing about boy", various types of flexing their nothing muscle bully mentality intellectual games and all sorts of other heavy breathing nonesense.

You politely started with: "CyberBoy did you ever get an answer to your question about the treadmill motor controller? "
You are too nice. Not me. I let the established heavy breathing nothings have it for wasting people's time as if they are really helping. All these nothings are doing is taking up the vulnerable person who is asking a question and getting led as if they he is going to get an answer. It is an outrage.

I let them all have it across the board.
People providing answers and trying to help is not an entitlement. Oh really, I didn't know that. Howabout more instead of helping provide answers, give the other person the run around by all sort of clever ways. That is worse than giving outright false answers. It is sickening, it is emotional theft. It is a pile of grabage wrapped up in nice fancy bags. And MaxheadRoom has his wrapping very polished and fancy full of color and artisticly designed while some other ones .... oh my.
You are a refreshing presence among these imposters. And I doubt if you are a permanent resident here. I see it in your remark. You just happen to stumble on this question
I am totally with you.
You are genuine and real. Thank you for being who you are.

 

MaxHeadRoom - you certainly are acquainted with the treadmill controls!
"Is this a MC-60 board?
If so there is a resistor that can be removed in order to resume speed on restart."

I really do not know if the board I used on my lathe is an MC-60. Forgot to make notes before encasing it. Just know it used a pot to control speed.
Which resistor would you remove to modify the start up?

Don't know what model of board this current project is, only quoting the numbers on the PCB [900176/75(2) KING]. And that it needs pulses to control speed. The motor does not have the overheat sensor in it.

So I wonder if a 555 timer could be used to control the speed pulses? Here's my idea of how it might look. I haven't calculated what speed it would like, so no values for the resistors or capacitor.View attachment 234030

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You asked if this board in question is a MC-60 board.
I sure don't see an answer for it. Nor does an answer that would say, " I don't know".
Here is an answer for that. No it is not an MC-60 board.
I have an MC-60 board right now. It is the most basic board and the easiest to get going. It has 3 hook up pins for a potentiometer and you are on your way to get the motor zooming in no time. In fact I used a 10K ptentiomter.
Hang on let me see if I can find a picture of it. I think it is in my google photos.
Yep found it. See the white, red and black wire going into the board on the far left side? Those three pins ( they are actually in the form your typical male prong, that is for your potentiometer)

 

MaxHeadRoom - you certainly are acquainted with the treadmill controls!
"Is this a MC-60 board?
If so there is a resistor that can be removed in order to resume speed on restart."

I really do not know if the board I used on my lathe is an MC-60. Forgot to make notes before encasing it. Just know it used a pot to control speed.
Which resistor would you remove to modify the start up?

Don't know what model of board this current project is, only quoting the numbers on the PCB [900176/75(2) KING]. And that it needs pulses to control speed. The motor does not have the overheat sensor in it.

So I wonder if a 555 timer could be used to control the speed pulses? Here's my idea of how it might look. I haven't calculated what speed it would like, so no values for the resistors or capacitor.View attachment 234030

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I also recently hacked this board. It is from a Vision Fitness T9200HRT. Control board as-mef1j-3b.
I had it posted here to see if I can get any idea for it. I got everything but what I asked for.... you can find it here as I posted it just in the last week or so.
I could not find anything anywhere whatesover. So I went about and messed with it myself and bingo I got it going. I tested it with a small motor I had. I use the motor to do my magnet wire winding plus it is too cold in the garage so I was in my room by the computer where it is warm.
I have not finished the labeling things, etc and I have made a video of it which I need to redo but that is another story, you know just for others. Real actual help that matters and not a bunch of high flying words throwing at them. I am not against high flying words. I would that after I give an actual answer and only if they ask in terms of principle of operation and only if I know it.

 

hello friend.
i have bc-1075 board that damaged by short circuit, and burn some power lines like the picture in attached files.
is there any one how can help me with a clear picture of both side of board or any schematic for bc-1075.
thanks