G251 documentation error

[jimlas53]

Hi all,
I have run into a problem regarding the G251 User Manual, Rev-7 dated July 27, 2008. I found this after killing a couple of my brand-new G251 drives (sniff, sniff).
On the first page of the manual, the terminal descriptions show the WRONG MOTOR CONNECTIONS. The pins called out are 4,5,6,7. When I generated my schematics, this is the page I used - consequently the motors were connected wrong, and two drives went bye-bye.
The second page of the manual shows the correct motor connections. I found this when I sat down and reviewed all of my documentation to try to figure out what happened.
I ordered 4 drives when they were on sale, expecting to keep one drive as a spare in the future. After correcting the schematics and the wiring, I have two functional axes and two dead drives.
I just wanted to bring this to the attention of anybody who has yet to power-up. Make SURE you are connected according to the SECOND page of the manual!!

I am thrilled with the smooth quiet operation of the two working axes. I have two other machines here using HobbyCNC drives, and they work well, but the G251 is an outstanding value and controller.

Hope this helps!

Doug

[Senna]

I just compared and made the corrections on my Rev-7 manual. Thanks for the heads up!

Senna

[Mariss Freimanis]

I prepared a corrected G251 manual on August 7 and I have no idea why it wasn't put up on the website immediately. I have attached the corrected manual and I will see to it that it gets uploaded today.

Please return the blown G251s and you will get replacements for them. Sorry for this screwup.

Mariss

[jimlas53]

Hi Mariss!
I think this manual came with the drives. It is printed on green paper and I don't have any of that
Actually I was relieved to find an error (somewhere!) that would account for the problem. I power up equipment all the time (work for an automation company) but I always have more trepidation when it comes to steppers - they are SO unforgiving!

Thanks for your excellent products and support!


Doug

[crocky]

Hi Doug,

Mine came on Purple paper and it was the old one as well, thanks for the heads up and also thanks to Mariss for the update to the book