SLA7051 Board - Ready for Prime time ?

[pminmo]

I finally finished the design of a compatable single axis board for the Allegro SLA7051. It's not built, but I would gladly work with a person to make sure all the bugs are out if any. http://www.pminmo.com/sla7051/sla7051.htm
Spec's on my website http://www.pminmo.com/

Phil

[TinkerDJ]

Hey Phil. I have one board nearly complete and two more boards that are yet to be populated. I am currently working right now so i will have to take some time to get one working. Did you change the design much from the original you had on your site. I worked out the two resistors for the sense part but i was wandering what you were using. I ended up with 1.1 ohm which doesn't seem right.

[pminmo]

Schematic a little, went to two resistors for the sense resistors. The one change I did put in was the sync pin. I wound up using the Allegro/Sanken recommendation out of their data sheet. Information on the 7051 is very limited, so I just decided to go that way. Only added a fet, resistor and capacitor.

Phil

[handystuffs]

Hi Phil and others

I'm a newbie and wonder if the SLA7051 board is working or still in progress. If it is, it will be the candidate for my very first stepper controller. I have 4 of those SLA7051 at hand and would like to put those in action.

Thanks

[pminmo]

handystuffs,
I have not built one, and I don't know if there are any issues or not. There is one minor thing I probably would change, putting a zener inline with the lm317. I would make this offer, if you want to etch a board and send it to me, I would build it and test it. I have the parts, just not into etching, and don't really have a need.

Phil

[mdreitzusa]

phil
do you have an eagle file for the sla7051 board.
i checked the data sheets and the sla7052 looks like a pin for pin replacement for the sla7051.
am i rite, if so then i could use my chips on this board.
if it is the same pin out then this could work for both chips.

[pminmo]

I believe you are correct they have the same pinout. Your post is very timely I just completed most of a 7051 checkout. Thanks to another Zone member for etching a board for me. Pic attached. Couple of things I want to change. I can say the circuit posted works, short of checkout of the sync circuit. I don't have the fet yet. Changes are clearance, I'm going to add a enable circuit, and a zener to allow the normal LM317 to be used.

[pminmo]

I've updated the files on the website today with what I learned on the protoype. Basically chaned some component and land spacing to make it easier to build. http://www.pminmo.com/sla7051/sla7051.htm
Changed some clearance issues, added a zener and resistor to eliminate the need for a lm317HV if your running max power supply voltage. I must say at 24V this little baby impressed me.

[mdreitzusa]

phil
i got the updated board.thanks for the pm.
can your cnc do fine enough work to do pcb work.if so here is an eagle file that will create g-code from the board design in eagle.