3-Axis Stepper Controller

[nikolaw]

tahks MP
but where i mast to connect +/-12v power for step motor
how? please help me?  :'( :'( :'( :'(

View attachment 39813

 

[MP1]

You won't be able to supply 12 volts to the stepper in this configuration. Just connect to the board. In a configuration where you use 12 volts for the stepper, you usually use a different stepper.  Aren't your steppers 5 volt ones? I thought this was the case. In a setup where you would use both the 5 volt and the 12 volt tap of the power supply, you would have your digital circuitry running from the 5 volt source and the motor circuit running from the 12 volt source.

MP

 

[GreekPIC]

You won't be able to supply 12 volts to the stepper in this configuration. Just connect to the board. In a configuration where you use 12 volts for the stepper, you usually use a different stepper.  Aren't your steppers 5 volt ones? I thought this was the case. In a setup where you would use both the 5 volt and the 12 volt tap of the power supply, you would have your digital circuitry running from the 5 volt source and the motor circuit running from the 12 volt source.

MP

MP, his main problem is that he has a bipolar motor while the board only supports unipolar ones (5,6,8 wire motrors).

There is a circuit that can be added to the board to drive bipolar motors (I have it around somewhere) but it needs 12 power transistors per motor. It's much better to just look for another motor.

Nikolas

 

[MP1]

Hi Nikolas,
From the drawing it looks like he has a board. Not sure. Did you know that you can change bipolar to unipolar on the 8 wire motors easily? You just connect the two center wires.
I have attached a basic drawing in case anyone is interested.

MP

View attachment 39829

 

[MP1]

Here is a schematic that will allow you to use 4 wire bipolar or 6 wire unipolar in the same circuit. It is also an example of using 5 volts for the digital circuitry and a larger voltage for the stepper motor as I described above.

MP

Bi-Polar_Stepper_Driver_ck1406.pdf

 

[MP1]

Here is also a PIC to Unipolar design that uses darlingtons. Of course, if you are running your circuit from the parallel port of a PC, you can connect the parallel port at points RA0, RA1, etc and not use a PIC.

Hope these are helpful to someone. The URL for the original site is at the bottom of the page on this pdf, so you can go there to get more information.

MP

PIC_to_Unipolar_Steppers.pdf

 

[nikolaw]

hi
my problem is this
i build board on this proekt whit UCN5804B
this board use +5v power suply
but i have some step motors whit 5 wires who works on 12 V
how can i conect this motors whit this board whet they need 12 V to work
this motors are from 5,25 floppy (the old one)
a what to build CNC who will work whit KCam 4 CNC Controller
can you help me pleas pleas

View attachment 39834

 

[MP1]

Is this using the schematic in our projects section or a different design? Please provide a link or post the schematic if it is not the one in our project section. We just need to know for sure which layout you are using.
A 5 wire stepper is usually the same as a 6 wire stepper with only one wire provided to supply the voltage to the center tap of both sets of windings instead of individual wires provided to the center tap of the windings as in a 6 wire stepper.

MP

 

[nikolaw]

Is this using the schematic in our projects section or a different design? Please provide a link or post the schematic if it is not the one in our project section. We just need to know for sure which layout you are using.
A 5 wire stepper is usually the same as a 6 wire stepper with only one wire provided to supply the voltage to the center tap of both sets of windings instead of individual wires provided to the center tap of the windings as in a 6 wire stepper.

MP

I use this projects
http://www.electronics-lab.com/projects/pc/008/
but i have step motors who work with 12V
how can i conect this steps whit the board
please help me?
can u give me mail or msn or skype
my mail is [email protected]

 

[MP1]

You can apply a higher voltage at the motors, connected to pins 2 and 7. Look at the data sheet I have attached for an example.

MP

UCN5804B.pdf

 

[GreekPIC]

this board use +5v power suply

It doesn't. It has an on-board 5v power supply circuit with the 7805 regulator. It takes a 8-24v input.

but i have some step motors whit 5 wires who works on 12 V

You connect 12v to the board. It goes straight to the motors. It also goes through the 7805 to provide 5v for the chips.

Nikolas

 

[nikolaw]

It doesn't. It has an on-board 5v power supply circuit with the 7805 regulator. It takes a 8-24v input.

You connect 12v to the board. It goes straight to the motors. It also goes through the 7805 to provide 5v for the chips.

Nikolas

hi
if i understand you i just need to connect  12V on place were i connect 5V???????

 

[GreekPIC]

[were i connect 5V???????

Nowhere. It's created on the board. Look at the PCB. It's my revised version but the basics are the same:

The 12v is connected to the two large pads on the right. The three pads next to them to the left are for the 7805. The lowest (square) is 12v input, the middle is GND and the topmost is the 5v output, which feeds the ICs

The large trace going up and then left, carries the 12v to the motors.

Nikolas

 

[nikolaw]

if i understand
i mast to do this???????

View attachment 39850

 

[GreekPIC]

You got it!

 

[nikolaw]

You got it!

thanks man you are super!!!

 

[nikolaw]

I made the board with ucn5804b
I connected it with KCam 4 CNC Controller
but the step motors are not working
how can I adjust the parallel port?
how should the picture that I put look like? ??? ??? ??? ??? ??? ???
thanks

View attachment 39903

 

[GreekPIC]

I'm not familiar with KCam, but you might want to select "Pin setup", that's how it's done to all other programs I've seen.

Nikolas

 

[nikolaw]

I'm not familiar with KCam, but you might want to select "Pin setup", that's how it's done to all other programs I've seen.

Nikolas

what program do you use?

 

[GreekPIC]

TurboCNC. I've tried also Mach2 and CNCplayer. I now downloaded EMC2 and seems like the way to go.