Open Source Boards Available, Stepper Drivers and Break Out Boards

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02-02-2007, 03:48 PM
pminmo

Quote:

Originally Posted by Montag

This is the Stepper
http://www.jaycar.co.nz/products_uploaded/YM-2751.pdf
This Driver With the compatable BOB
Discrete Driver Boards

The Stepper is 12v 0.4a 6wire

the boards work as far as i can tell i have had turbo cnc running and was a ble to use the logic probe to get pulsing from pin3 on IC4 so i am guessing that it is all working i have now installed IRLZ44N in place of the IRF540N that i purchaced at the time. the motor will still not spin

i wired yellow and blue together
and red and brown together
grey and green to +12v

dose it matter what Wago they go into (x9-1 yellow red ect) i have tryed other combo's with no change. the motor moves if i rub one of the wires on to the -12v. I have no idea what else to try the mosfet's are all working as far as i can tell IC4 pin 1 high Wago X9-1 lo ect as per instructions, +5v working well

Basicly i would think that if there is a pulsing on the board logic when i move the Axes on the computer it should work maybe there isent enough current somthing like that HELP !! please

the power supply i am using is 12v 8amp running at about 11.5v 7.5amp

http://pminmo.com/troubleshoot.htm

http://www.pminmo.com/phpBB/viewforu...4a77d9455f777c
02-03-2007, 09:19 AM
Montag

Thanks for the help. You have an awsome site Pminmo Thank you.
05-29-2007, 09:46 PM
waleed alhadidi

Thank u man , that's what I'm looking for
11-20-2007, 03:34 PM
phat86

Hello every body .
I have 3 stepper motor and 3 drivers of Vesta . That is 5 phase stepper motor . Any body can help me how to connect LPT to this driver to control them by PC.
I see there are some port on this driver : CW+,CW-,CCW+,CCW- ,H.OFF+,H.OFF-,TIM,O.H,COM
Please help me .
Thank you very much .
And I thank Mr Pmimo help me to control 2 phase stepper motor on his web .
11-22-2007, 06:24 AM
phat86

Mr Pminmo
Where are you .
Please help me connect pc to this vexta driver .
Thank you very much .
06-22-2008, 03:56 PM
polsmc

Hi everyone. my first post here, hope this is the right place. Does anyone have any bare or assembled A3986 PCBoards for sale?
07-16-2008, 10:57 AM
micro5

I looking for buy PCB board too,
02-26-2009, 01:48 PM
biren

Hi , I am Biren from India.I want to use A3986 IC for stepping control for 90KG/cm2 Bipolar Motor with 6 Amp per phase rating.Can you help me for ckt designing?
02-26-2009, 05:40 PM
pminmo

There is a long thread on the problems associated with the A3986 chip here.
04-29-2009, 05:38 PM
GaryStofer

Schematic and Artwork ?

Can you double check the link you gave ? It gives me an "Invalid Article Specified error message when I follow it.

Thanks

Gary

Quote:

Originally Posted by ynneb

Phil, there is now a new section created for " Free/Open-source CNC electronics Schematics and artwork" you can access it from here http://cnczone.com/modules.php?name=...ategory&cid=58

If you would prefere CNCZone to host the file, please send it to [email protected]
04-29-2009, 06:24 PM
pminmo

Quote:

Originally Posted by GaryStofer

Can you double check the link you gave ? It gives me an "Invalid Article Specified error message when I follow it.

Thanks

Gary

What link are you looking for?
04-30-2009, 05:35 PM
GaryStofer

Schematic and Artwork ?

Quote:

Originally Posted by pminmo

What link are you looking for?

I was looking for the schematic / artwork of the open source controller.

Ynneb gave a link http://cnczone.com/modules.php?name=...ategory&cid=58
indicating the files where local to cnczone, but that link doesn't work for me.

Gary
04-30-2009, 06:38 PM
pminmo

I believe going back in time it would be this location: http://www.cnczone.com/modules.php?n...category&cid=5
04-15-2010, 11:44 PM
mody

Thank u man
03-16-2011, 03:11 PM
Urbania

Hi all. I am about to start building driver boards and the BOB while I assemble all the components to build mysef a JGRO CNC router. I have a couple of questions regarding the Open Source L297-8 bipolar driver boards you guys have done a fantastic job of developing for us DIY'ers.

1. In the documentation for the L297-8 drivers PMinMO mentions the fact that we can use LM138/338's instead of the LM317 voltage regulators. My question is, is the LM338K a drop-in replacement for the LM317? (with obvious regard for the BCE configuration, and the maximum current rating of the L298's )

2. The datasheet for the LM-series mentions that the usable voltage range is not from 0V to the rated maximum, but rather that the maximum rated voltage may not be exceeded between the source and load pins on the regulator. This suggests that as long as we are not regulating down by more than say the 32V allowable range of the LM338K, we can use higher voltages through the regulator. My question is, is this possible given the other components in the system such as the L297/8's? It would make my 24V salvaged steppers useful for my project.

Any help would be appreciated. I am not an electronics guru but have been building other people's designs for years, so while I know how to put 'em together, i'm not skilled enough to make changes to them to suit my needs. :)

Regards,
Wayne
03-16-2011, 05:51 PM
pminmo

Quote:

Originally Posted by Urbania

1. In the documentation for the L297-8 drivers PMinMO mentions the fact that we can use LM138/338's instead of the LM317 voltage regulators. My question is, is the LM338K a drop-in replacement for the LM317? (with obvious regard for the BCE configuration, and the maximum current rating of the L298's )
Regards,
Wayne

Where do I say you can sub a LM138..LM338?

As far as I know the LM138..LM338 are only available in TO-3 packages. The pcb for the L297-8, the LM317 is a TO-220. Two entirely different mechanical packages.
03-16-2011, 10:19 PM
Urbania

Quote:

Originally Posted by pminmo

Where do I say you can sub a LM138..LM338?

As far as I know the LM138..LM338 are only available in TO-3 packages. The pcb for the L297-8, the LM317 is a TO-220. Two entirely different mechanical packages.

PMinMO, my apologies. I was reading through various PDF's covering open source boards today, and obviously I mistook the PDF as being one of yours. I'm trying to find the one I read where it stated that if our amperage requirements are higher than 2.5A or so we should consider going the route of LM150/350 or LM138/338, but for the life of me I can't find it now. I know I read it today while browsing through the PDF's but I can't remember where! I was using my work PC at the time and i'm using my home PC now so I can't even check my IE history. :confused:

Anyhow, I too realise that the TO-3 package is vastly different to the TO-220 package, but apart from the obvious issues mounting a TO-3 with heatsink to the PCB, it is still an easy task to substitute the LM338K if it will work in the circuit.

I'll try and find the relevant PDF when i'm at work again in the morning.

Wayne

EDIT: Oh bugger! I remembered where I read it, and it wasn't even a relevant PDF. It was in the datasheet from National Semiconductor! Clearly i'm getting old! Quoted below. :o

Quote:

For applications requiring greater output current, see LM150
series (3A) and LM138 series (5A) data sheets. For the negative
complement, see LM137 series data sheet.

FURTHER EDIT: In support of my other question, here is another quote regarding the fact that the max voltage handling capabilities of the LM317 refer to the differential between the input and output voltages, and not the maximum voltage above ground that the regulator can handle -

Quote:

Besides replacing fixed regulators, the LM117 is useful in a
wide variety of other applications. Since the regulator is “floating”
and sees only the input-to-output differential voltage,
supplies of several hundred volts can be regulated as long as
the maximum input to output differential is not exceeded, i.e.,
avoid short-circuiting the output.
03-17-2011, 12:37 AM
pminmo

Both the 317 and 338 are floating regulators, so max input to them is the regulated output voltage plus the differential max. So for a LM317 that is configured as a 5V regulator, 45V is the max input voltage. (40V max differential). The 338 has a 35V max differential verses the 40V of the 317. Computing resistors is the same, except Iadj is slightly different.

BTW you don't need to regulate the voltage for the motors, if your thinking motor current comes into play.
03-19-2011, 01:36 AM
Urbania

Thanks for the feedback PMinMO. I was thinking of using an LM338K instread of the LM317 to reduce the workload on the regulator at higher currents. By that I mean that if you run a device rated at 3A at 3A you are driving it hard and will have issues like a high average working temperature and shortened lifespan, whereas if you run a device rated at 5A at 3A you are more or less in the mid-band of the device's capabilities which should reduce the impact of temperature and lifespan.

Over and above that, I would like to run my boards at 3A if possible to cater for a few higher torque motors I have scrounged.

Wayne
03-19-2011, 04:06 AM
pminmo

Again, the regulators in the circuit, as designed, DON'T play in the motor current......... You don't need a 5A regulator for a less than a 100ma. If you look at what the LM317 runs, it's the 5V on the board. The incomming unregulated VDC (18V or more) is used for the H bridge of the motor in the L298.

If your thinking of regulating the supply voltage to the motors, don't, it's a waste and more times than not reduces performance.

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