Building Phils sla7051 board

[TinkerDJ]

Is anyone or has anyone built Phils 7051 board. I've completed one and if i have time i will test it this weekend. I'm having problems trying to figure out the connects to the bob board. Any advice is greatly appreciated.

[pminmo]

Dave,
What questions do you have?

Phil

[TinkerDJ]

Thanks for designing the boards Phil. I had to buy a laser printer to start making pcbs again. I got tired of doing the photocopy thing. The boards came out great when i did the toner transfer. So far i have no problems, but i haven't tried to run the board yet. I need to build the bob board as well so that i can start testing. I've got all the parts sourced now so i should be able to go from here.

Is the connection from the 7051 board at jp3 to the bob all i need. I'm assuming jp1 to be for full/half step and what about jp2 is this to select cw/ccw? What is EL for? Thats all i have any questions about. Other then that, very nice tight little boards.

[pminmo]

Dave,
Your in unchartered territory. I really wasn't finished with the board, but in reality the only thing I hadn't done was wire the sync input, and verify the pinout model one last time. JP3 goes to the breakout board. jp2 is for hardware direction setting and one post as a measurement point for the ref setting, jp1 is full or half step. EL is just a measurement point for incomming voltage. E1 and E2 are jumpers if you want to route the onboard +5 to the bob, which is really for future growth for an opto isolated bob. Don't don anything with them now. You'll have to put a jumperwire on the sync pulse, I'll have to look at where to.

Phil

[TinkerDJ]

I'm in no great hurry at this point. I have one board complete if theres anything you want me to try with i'd be more then happy. The only reason i was working on the board is i happened to have all the parts and i'm making about a dozen pcb's right now to cover my back log of projects.

[pminmo]

Is it assembled?

[TinkerDJ]

Yeah although i still haven't worked out the resistors for the vref. Once thats done i can start testing it. The pcb traces came out great with the toner transfer. I did the 3 boards for 7051 and a bob board. I was going to do the ss3977sed board but i can't get it to scale right. For some reason corel draw keeps enlarging the image so large i can't get it to scale right to print.

I also made a pic programmer board, pic lcf meter, an icd2 clone, a thermocouple to pic with 8seg led - don't now if this one will work, i should have built a working one on my solder board, and a couple others. I have a back log of projects to try and complete.

I was going to use my small router to cut out the pcb's but i blew one of the ucn5804 chips and decided to build some of the ones you've designed. I was printing off the pcb's with my bubblejet and then using a photocopier to put them on photo paper, way to much hassle so i waited till i had the money and bought a minolta referb printer from future shop for a $100 dollars. I am in no way endorsing future shop, I really hate buying from the big stores and i tend to deal with the smaller retailers in town but it was alot cheaper then what i had looked at before so it worked out.

Once i get these 3 boards working with the bob then i can get my router back together and start working from there. My idea to make a pic board to drive the stepper drivers is on hold till summer when i can get more of the code down and work on a design which is going to work for me.

[pminmo]

Tack a wire on the sync pin of the 7051 to gnd. Doublecheck the layout verses the pinout. I did the model and since you are the first to use it....well I do goof periodically.

Phil

[TinkerDJ]

Sure thing, i'll have a look at it tonight and post back. So far it all looks good when i compared it to the pinouts on the data sheet. I need to double check the pinouts for the wires i ran to the bob aswell i think i may have done them wrong. No problems though were all human.

[zoltan]

Is herein somebody who built a board with sla7029? Or, maybe is somebody who has a schematics with sla7029, not that from datasheet, but one which have been, eventually, tested? I got a bunch of sla7029, but really, I do not understand exactly the datasheet and I have not seen any real circuit, and I do not know from where to start. It is pitty to let these sla7029 rest in drawer.
Thank you.