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krazatchu,
Thanks for finding my typo on those IGBT's & 2nd the use of both these IC's was due to having spares sitting around left over from the 150V 10A stepper motor driver design that I just...

Hello,
While running some tests on a stepper motor driver circuit over this past 5 days I took the time to build up one of the 2 circuits I have seen here in this post. But as I was trying to do...

Guys,
First of all DON'T WASTE YOUR TIME trying to get the SLA7024M INSTEAD go for it's bigger brother the SLA7026M, WHY well the 2 reasons that I see are as follows. The 7024M is rated for 46VDC...

First of all this design is not the one Mariss & I are talking about though the concept is 100% the same except this design requires the DEAD TIME to be controlled by the PIC or Atmel thats...

Mariss,
Seems the same equipment is used in this type circuit as used in (SMPS) switching power supplies. I have been able to clamp around the 2 legs of the sense resistor but not just one as...

Sir,
I have from the begiining seen & understood his math it's just how he words things that makes me wonder if I am reading them wrong. After you work with some of the top engineers in the world...

Mariss,
The pictures you talk about are on our walls here too. We used a current sense resistor which showed the least amount of inductance for our bridge's source to ground resistor. Now even...

Sir,
As the poster before me mentioned you are better off going with a BIPOLAR steeper driver & BIPOLAR motor configuration. But no matter which style you use HEAT is always going to be you...

Mariss,
As a RF Engineer of 30 years who has spent 28 years working in RF up to 100GHz & now works with switching power supplies & servo motor control's I am making lots of errors, most from...

TO BOTH PARTIES,
YES I WILL POST THE PCB IN BOTH GERBER FILES & A PDF FILE PICTURE, & YES I HAVE THOUGHT IT OVER AND EVEN THOUGH A GOOD LAWYER CAN GET A SIGNED WAIVER OVERTURNED IN COURT I WILL...

Here is the new thread http://www.cnczone.com/forums/showthread.php?t=63910 with the changes brought about by not wanting to leave the fix for pass though in the hands of the builder as I had it...

To everyone here,
My plans were to layout the pcb get it produced & supply people with a kit made up of the pcb & hard to find parts. But after getting some feedback by a couple of old timers I...

Mariss,
The 1N4004's had to go because of your explaination at first. The problem I had was that the parts I used were in a platic bag, in my part's drawer that had a note on them saying '1N4004'...

Mariss,
As per your suggested changes of which all have been done & verified the unit is still operating well. But the errors on my part would have caught up to me at a point in time that would...

THANKS, ONE DAY MY PUTTING THE DECIMAL POINT IN THE WRONG SPOT IS GOING TO BLOW UP IN MY FACE. NOW IS SEE THE ERROR OF MY WAYS.
Anyway the 10K resistors are gone from my newest design as it too...

SIR,
PLEASE LOOK AT MY REVISED POSTING HERE AS IT HAS FIXES FOR A FEW PROBLEMS THAT NEEDED ATTENTION. 1ST BEING THERE WAS NO HARDWARE PASS THROUGH PROTECTION AS IT WAS BEING DONE IN THE MPU...

Sir,
I checked my parts & the one's I am using are a ceramic bodied part but they have the same exact spec as a 1N4004. I tried another part I thought was a 1N4004 but it turns out they were...

HELLO,
This is my updated design which is a complete Bipolar Stepper Motor Driver circuit that once built by anyone here will control any Bipolar Stepper Motor that uses a motor voltage of 150VDC...

The design works but because of some input from a member of this forum & operator of a website just for this type of stuff I have stopped the work on this unit & started doing another unit. But as...

Holzwurm56,
I just posted a design I did for myself that works to 150VDC though the semiconductors are rated to 200V. The fets have a 28A rating but to be honest you might want to parallel all of...

Hello,
Just wanted to give back to a forum who's material has helped educate an electrical engineer understand mechanical stuff. Any I will try to be brief.

I am converting my HF 5980 to...

Right now I have used an Intersil HIP-4081A at 80V @ 2.5A with good luck but now I am running my 495oz in bipolar stepper motors at 86VDC using a design I did to get around the 80V limit of most...