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Stepper Motor Driver v3.0

by MakerBot, published

Stepper Motor Driver v3.0 by MakerBot Jun 30, 2009

Description

This is the latest incremental improvement to the RepRap Stepper Motor Driver board. This revision brings some polish and a few new features that are really awesome.

1. For the endstop connectors, we've switched to a smaller footprint 4-pin Molex connector typically used as the audio connector on CDROMs. This brings a few nice features: smaller connector footprint (both connector and cable), cheaper connector cables (by a whole $0.15!) and much less confusing to newbies who may confuse the stepper driver with an ethernet card.

2. We've switched back to the A3977 chip which was originally discarded as too hard to solder (before we knew of solder paste, sadly) This chip is awesome! It offers from full to 1/8 step functionality, 2.5A per phase, and no heatsinking required. Its pretty awesome.

Thats about it. Same footprint as the SMD v2.3, with the same NEMA23 bolt spacings for those crazy enough to bolt it to a motor directly, heh. I'm pretty excited about this board. Early tests have shown it to be much quieter than the v2.3 driver. Yay!

Recent Comments

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Could you use the A3977SEDTR-T instead of the A3977SED-T? It seems the same the only difference I noticed is the "TR" and the "(VA)" after the companies name.

Where can I find the missing files "tools.inc" and "user.inc" for "stepper-motor-driver.pov"? *DONT_KNOW*

Makes

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Dragonfly on Black Acrylic

License

GNU - GPL
Stepper Motor Driver v3.0 by MakerBot is licensed under the GNU - GPL license.

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Instructions

Wait patiently or etch your own. We are sending off prototypes (1-2 weeks) and then we'll be documenting them (1-2 weeks) then we'll be doing a production run and making kits (1-2 weeks) Then we'll be releasing them for sale at MakerBot.

Comments

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Anonymous on Sep 8, 2010 said:

Could you use the A3977SEDTR-T instead of the A3977SED-T? It seems the same the only difference I noticed is the "TR" and the "(VA)" after the companies name.

rhmorrison on May 28, 2010 said:

Where can I find the missing files "tools.inc" and "user.inc" for "stepper-motor-driver.pov"? *DONT_KNOW*

Anonymous on Feb 7, 2010 said:

R11 and R12 are 56K or 33K ?

Manfred on Dec 17, 2009 said:

hey

i made dis pcb it works fine with a small motor but if jou try to power a bigger motor at 1,5 A or more the chip shut down, the problem has a easy fix add a 47uF elco between Vbb and ground pin 25 and 24.

i will make a new pcb
with a gound plane and thik lines

sorry form my englise

Manfred on Dec 19, 2009 said:

just found the ground planes after cliking on the ratnest botton

ril3y on Dec 16, 2009 said:

It looks like the A3977 is hard to come by. They recommend you use this one instead.
http://www.allegromicro.com/en...

Just make sure the pintout / footprint looks the same.

ril3y on Dec 16, 2009 said:

Looks like a 1A limit though.

Anonymous on Dec 6, 2009 said:

Thx for uploading!

Just etched
&
amp;
&
amp;soldered :) Made without solderpaste!

How can I check, if it's working without a mainboard?

Anonymous on Nov 14, 2009 said:

Zach,

Here is some pics of laser etching the board. I have not done the 2nd side but just an update. Also, I added vector cut outs to it so a laser cutter can cut holes after the boards copper has been removed. Our Contraptor.org cnc stuff is really suffering from too much vibration so we are hoping
that the ability to microstep will solve some of this.

Some more pics here: http://www.flickr.com/photos/3...

Riley

Anonymous on Oct 21, 2009 said:

Zack,

I am no Eagle expert but this is double sided right? (Since layer names were Top and Bottom )

Ril3y

Anonymous on Nov 1, 2009 said:

yup.

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