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yes! - Small motors, maybe like floppy drive motors? Or what type? Nice looking board!
Do you have more details? Will you offer the specs and board for sale? Build them? Good Luck.
Jim
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My 3d microstep motor driver For small motors i developed small PCB with 3 driver.
Main CHIP is A3977
Foto is in attachment..
BR
Greg
yes! - Small motors, maybe like floppy drive motors? Or what type? Nice looking board!
Do you have more details? Will you offer the specs and board for sale? Build them? Good Luck.
Experience is the BEST Teacher. Is that why it usually arrives in a shower of sparks, flash of light, loud bang, a cloud of smoke, AND -- a BILL to pay? You usually get it -- just after you need it.
If using the Allegro 3977 then they will handle bigger than floppy drives as they 3977 are rated to 35Volts and you can pull 2.5amp per phase.
Think heat sinks would be needed if pulling the full whack out of them though.
Are the dips for setting the step and notcied two pots on each chip, is one for Vref and other for PFD?
I have just finished the design using the A3977SED PLCC version of chip and will be soldering up over the weekend.
Well done Greg looks good.
Regards
Sean.
********************
http://www.cncdudez.co.uk
smartgsm, nice looking board. I hated soldering the tssop's! Did you make a method to handle the pad underneath for heat dissipation?
Phil, Still too many interests, too many projects, and not enough time!!!!!!!!
Vist my websites - http://pminmo.com & http://millpcbs.com
I have doble sided PCB.
On PCB where is a3997 pad make 3 holes dia 2 mm. First soldering all pins. Then solder with tin via this 3 holes pad to pbc.
br
Greg
Looks like a good design.
Are you willing to share the PCB design with the cummunity ?
Cooling issues: Did you install schottky diodes on the 3977 outputs ?
I will run much cooler if you do...
Best regards,
Bert
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