STK6712BMK4 or SLA7026M or TD62308AP? I dunno....

[mr jones]

Ok, I have finished the mechanical on my mill.....my mill is a 3 axis 48"X20"X5" (X, Y, and Z respectively) which utilizes 2 2.5v unipolar steppers wired in parallel for the X, 1 4.5v. unipolar for the Y, and 1 24 volt unipolar for the Z.

All parts were taken from 2 full size office copiers and has taken me 2 months to complete the mechanical.....I saved every circuit board, wire, connector, motor, electronic component and every other useful thing I thought might come in handy one day----among those useful things there exist 3 different motor driver chips that have been the focus of my work for 2 weeks now. I am no closer today to figuring out how to configure these chips than I was when I started.

the chips are........

http://www.ortodoxism.ro/datasheets/...TK6713BMK4.pdf

http://www.allegromicro.com/en/Produ...7024/97024.pdf

www.ortodoxism.ro/datasheets/toshiba/3945.pdf

I have several of the aforementioned chips (3-5 of each).

If anyone has any experience with any of these motor controls or can offer a relatively cheap (like under $50) alternative I am all ears.

But these motor drivers are whoopin on my butt......paddling it HARD!!

Any ideas?

[bezel6]

Hello,
First post.. Woohoo..
I am also interested in any help anyone has in using STK6712BMK4...
I started working on the electronics of a CNC while collecting bits for the machine. I made a 4 axis BOB and 3 discreet controllers and tested everything ok on some small steppers out of inkjet printers. I was not happy with the amount of heat coming from the resistors so when I got hold of a large photocopier that I stripped and found some bigger steppers that I could use i downloaded the datasheets for the drivers STK6712BMK4 and had plans of using these on my CNC system as they were choppers.
Months of searching the internet later I am no closer.. If anyone has any suggestions regarding hooking up this driver to my BOB or printer port I would be very greatful...
I do not mind blowing up 1 or 2 if necessary to try and get them going as I have quite a few at my disposal.
I love this site have been reading stuff off and on for months...
Catch ya..
David..

[kreutz]

Originally Posted by bezel6 Hello, First post.. Woohoo.. I am also interested in any help anyone has in using STK6712BMK4... I started working on the electronics of a CNC while collecting bits for the machine. I made a 4 axis BOB and 3 discreet controllers and tested everything ok on some small steppers out of inkjet printers. I was not happy with the amount of heat coming from the resistors so when I got hold of a large photocopier that I stripped and found some bigger steppers that I could use i downloaded the datasheets for the drivers STK6712BMK4 and had plans of using these on my CNC system as they were choppers. Months of searching the internet later I am no closer.. If anyone has any suggestions regarding hooking up this driver to my BOB or printer port I would be very greatful... I do not mind blowing up 1 or 2 if necessary to try and get them going as I have quite a few at my disposal. I love this site have been reading stuff off and on for months... Catch ya.. David..

I just read the datasheets for that component, you can use an L297 as a translator to drive it (in Full and Half Step), (don't use the L297 chopper), I don't offer myself to design the circuit because I am overloaded now.

[Dazza]

Hi,
I also have a few STK6712BMK4, I think I can manage to couple it up with a microcontroller probably a PIC16F628, I'll post the complete project when finished, it will be full step at first then I'll work on making it half step later on, it will probably take quite a while for me to finish this project, (I don't have a lot of spare time at present). My knowledge in electronics is fairly poor but I don't think this one is beyond me.

Darren.

[Dazza]

Hi,
I also have a few STK6712BMK4, I think I can manage to couple it up with a microcontroller probably a PIC16F628, I'll post the complete project when finished, it will be full step at first then I'll work on making it half step later on, it will probably take quite a while for me to finish this project, (I don't have a lot of spare time at present) my knowledge in electronics is fairly poor but I don't think this one is beyond me.

[AbSat]

I did a short test with the SLA7024/26 driven by a L297 and that worked.
I used the chopper from the L297 but did not perform a complete test under different load conditions. With a L297 only full and halfstep are possible.

AbSat.

[wilfrieds]

Hi there

It has been a while since you posted for help.
I know did the same thing, strip an old copy machine for CNC practice.
The datasheet for the stepper driver is of not much help.
Have you overcome this problem?

best regards
wilfried

[bezel6]

Hello wilfried,

No I am not much closer to getting this circuit working, I got sidetracked by other projects and put the CNC on hold when someone mentioned working on a PIC version.

I do not know how he has progressed.?

Like you I really want to get these things going but just don't seem to have the time lately, my sisters "new" house just needs too much work and her poor brother is usually the one to sacrefice his spare time to go do it...

Let us know if you do get something going. One day I will get back to my CNC project, I have lots of plans for it.

Take care.

David...

[wilfrieds]

Hi

PIC is not a problem, can help there.

regards
Wilfied

[Konstantin]

Hi.
I have picked up some Sanyo's STK6713BMK4 stepper drives. So far I have been experimenting with them with mixed results. The 6713 is rated at 3.0 A max (50% duty cycle (I wonder what that means)). The drive is a 4 phase, active low. I have choosen to build a little board based on the L297 to be able to utilize STEP/DIR. The problem I am experiencing is that L297 gets hot in a minute or so and the drive wont respond. It kind of wants to move the motor but it does not. I am not sure how should I wire the remaining L297 connections that are not used. I mainly need this IC to translate STEP/DIR into 4 phase output.

About the Sanyo drives, they are mounted on a pcb same width of the STK6713 and about 3/4" wide. There are very few parts on it, mainly 2 caps, a network 10k resistor (pull up I guess) and the current limiting resistors R1,R2. I have checked the values on those resistors and they do not fit in the formula provided for current limiting if one applies 5v at the Vcc2. Many of the STK6713bmk4 I got were hooked up to 1A motors.

[AbSat]

Hello Konstantin.

Can you give us the connections you made between the L297 and the STK6713?

I took a quick look and in my opinion it should work if you make the following connections between the L297 and the STK6713.
Pin 4(A) to pin 13(A), pin 6(B) to pin 15(A/), pin 7(C) to pin 14(B) and pin 9(D) to pin 16(B/).
The INH outputs of the L297 are not used.
Because you are using the chopper of the STK6713 you can connect the pins 11, 13, 14, 15, 16 of the L297 to gnd and pin 1 to VCC.
If you are not using the enable input pin 10 for control, it can be connected to VCC. With pin 19 half/fullstep mode you can switch between full and halfstep.

What values did you find for the Vref resistors?

Take good care of the powerconnections between the boards. Specialy the VCC +5V connections and the gnd. Differances between the 5V at the L297 board and the STK6713 board or bad gnd connections between these boards can damage the L297.

AbSat.

[box1sa]

Where can i ask some good technical advise about my motor and spindle control as well as software.

Change to existing system

New at this