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Author Topic: I need use the motor brushless with 5 axis stepper card  (Read 1510 times)

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I need use the motor brushless with 5 axis stepper card
« on: February 19, 2018, 01:58:43 PM »
hi, I need know if possible pilot the motor brushless with  5 axis stepper motor card :
« Last Edit: February 19, 2018, 02:02:37 PM by bennet »
Re: I need use the motor brushless with 5 axis stepper card
« Reply #1 on: February 19, 2018, 02:36:54 PM »
Hi,
you'll not be able to use that motor to achieve position control, you could use it as a spindle motor.
A simple on/off or if you have a speed control for the motor you might be able to have Mach assume
that as well.

Craig
My wife left with my best friend...
     and I miss him!

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Re: I need use the motor brushless with 5 axis stepper card
« Reply #2 on: February 19, 2018, 02:42:50 PM »
sorry t have to say this,

it's like a question: can i drive a car with bananas?

sorry again
anything is possible, just try it.
if you find some mistakes, in my bad bavarian english,they are yours.
Re: I need use the motor brushless with 5 axis stepper card
« Reply #3 on: February 19, 2018, 03:16:27 PM »
can you explain me how to make ? I have also the servo tester for variable speed motor.

the follow picture this is the the wiring scheme for right use of motor and the output /input wires of the control speed driver.

the red wire send 5V for power the servo tester, and the yellow wire is a signal, green wire is the ground.
 
Re: I need use the motor brushless with 5 axis stepper card
« Reply #4 on: February 19, 2018, 04:12:19 PM »
Hi,
that 'servo tester' refers to a radio control servo which a specialised PWM modulation, probably more technically
described as pulse position modulation.

Mach3 is not capable of producing such a pulse stream, with a suitable electronic circuit no doubt it could but
I'm dubiuos thats the right way to go.

Have a look at some of the brushed DC spindle motors on Ebay.

Craig
My wife left with my best friend...
     and I miss him!
Re: I need use the motor brushless with 5 axis stepper card
« Reply #5 on: February 19, 2018, 08:47:13 PM »
IIRC someone makes a device to do what you want. GOOGLE is your friend.

Mike
We never have the time or money to do it right the first time, but we somehow manage to do it twice and then spend the money to get it right.
Re: I need use the motor brushless with 5 axis stepper card
« Reply #6 on: February 20, 2018, 11:12:23 AM »
What do you want to use the brushless motor for?
You need a pwm output to control the ESC, and you might not have that on your stepper control card.
If you have an Arduino board you can experiment generating a pwm signal and run the brushless motor. The pwm signal goes to the white wire and grd goes to the black. The battery (or dc power supply) for the ESC goes between black and red. That would be +5v to the red from an arduino. This is a good idea to help you learn how this stuff works.
Observe voltage limit of the brushless motor, sometimes listed as 3S, 4S etc. This refers to the size (number of stacked cells) of LiPo batteries. The current draw of an ESC is quite large compared to common power supplies capability, so using a brushless motor in place of a stepper is a bad idea. Typical ESC might be 40A, and go up to 160A and higher. I have a water cooled brushless motor that uses 4S batteries and a 200A ESC for an RC boat. A stepper motor might draw 3A.
A brushless motor and a stepper motor are very different with different intended use. A brushless motor is a 3 phase motor, like a blower motor, so using it as the spindle motor of a cnc machine is it's only choice, and a bad one. They work very well spinning a propeller on a quad-copter due to large power developed and variable speed, and the ability to use a battery.
Stepper motors are not intended for fast, continuous rotation like a spindle motor or a blower motor. They move to an exact position based on the number of steps ordered, usually 200 steps per revolution (or a multiple of that). This is why they are used to move the axes of a cnc machine ... precise positioning at a slow rate. A 24vdc 15A psu are enough for three of them, and way cheaper than batteries.
Learn how 3 phase motors work (the 3 leads circled in black above) and how radio controlled models are controlled (small plug circled in blue above).
Re: I need use the motor brushless with 5 axis stepper card
« Reply #7 on: February 20, 2018, 12:57:24 PM »
I want use as spindle motor in mini mill, not same stepper motor. I want pilot the brushless with the card ST-V2 5 axis and mach3. But I not know how to make . I can wire the ESC control speed to output control spindle joint inverter on the breakboard ?

I have the BRUSHLESS :
Specs.
Turns: 10T
Voltage: 3~4S Lipoly
RPM/V: 1250kv
Internal resistance: 0.022Ohm
Max Loading: 54A
Max Power: 755W .

CONTROL SPEED SBEC Specs:
Max Cont. Current: 70A
Max Burst Current: 85A
Max BEC Current: 3A
BEC Voltage: 5.5v
LiPo: 2~6S
NiMH: 5~16cells
Weight: 84grams
Max RPM (2-pole): 200,000rpm
Size: 69 x 33 x 23mm
Motor Plug: Female 4mm bullet Connection
Battery Plug: Nil
Features.
Extremely low internal resistance
Very low operation temperature
Over temperature protection
APEC MoSfets (Taiwain)
Programming Options.
Battery Type: 2S~6S
Forward/Reverse
Soft Start
LV Cut off Type (Ignore, Reduce Power, Stop Motor)
LV Cut off setting (2.5~3.5v in 0.1v increments)
Timing (Auto, Very Low, Low, Normal, High, Very Hgh)
Switching (8,16kHz)
Factory Restore
Active RPM Control: On/Off (Governor Mode)
Default factory settings.
Brake: off
Battery: LiPo Auto Detect
Low Voltage: 3.2v (power down motor)
Timing: Auto
Frequency: 8KHz

SERVO TESTER  :
Servo & CCPM Servo Consistency Master/Checker
Size: 49x43x29mm
Input: 4.8 ~ 6V
Output up to 3 servos at once!

And the breakboard is this :
« Last Edit: February 20, 2018, 01:07:27 PM by bennet »
Re: I need use the motor brushless with 5 axis stepper card
« Reply #8 on: February 20, 2018, 01:13:19 PM »
Hi,
the ESC uses a PWM popular with RC. It has a pulse width of between 1 and 2 millisecond refreshed every 20 milliseconds or so.

Mach3/BoB does not produce that sort of signal naturally. You will have to have a circuit to convert standard PWM (duty cycle) to RC style. As Mike said:
Google is your friend.

To use this motor as a spindle is likely to cause it to overheat.

Craig
My wife left with my best friend...
     and I miss him!
Re: I need use the motor brushless with 5 axis stepper card
« Reply #9 on: February 20, 2018, 02:49:05 PM »
To use it as the spindle you need to feed the ESC the correct voltage with enough amps, making the power supply a major expense, unless you use lipo batteries as it was designed for. Up to you, but it would be easier to get a 120v mini router and adapt it to your machine. This gives you a collet to hold tools too. How are you going to put a collet on the brushless motor?
If you really want to do the brushless, you need to set up an Arduino ($12us) and program it to deliver a pwm to the ESC with a potentiometer on an analog input. Or just use the servo tester. If you really want to control the motor from the motion controller, you could take the 0-10v output spindle speed control signal (if it has that), put it through a voltage devider ckt and send 0-5v to an analog input of the Arduino, then generate the pwm based on that. Easy to do the control, but why would you want to?
Go nuts man.
« Last Edit: February 20, 2018, 02:51:03 PM by Roaster »