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Geckodrive's Yahoo forum - not meant for official support
One of our members tried to get a bit of support at Gecko's Yahoo forum recently, but his request (and my prompt) went unanswered over there. Last night I took a chance and pulled Mariss's leg about it. His response contained a number of points which could be useful for future users of Gecko's stepper drives:
"Please see "G203V MOTOR WON'T TURN troubleshooting.pdf" in the files section of this group (the Yahoo forum - GD), G203V folder. "Official" support, the kind that gets answered the same day if not within minutes, is support@... for specific problems. The way Mach3 conducts support on their yahoo group is different because their product is software. Software is infinitely more complex than hardware and the resolution to found problems are programming changes. In effect, on-going design changes to the product. We peddle hardware which is far simpler in complexity and therefore has far fewer permutations in what it does and how it can be used. Once a circuit is wrung-out for design errors, no further changes are required and the design is "locked down". This happens when there is no discernible pattern in diagnosed faults or the faults obvious and the level of faults drops below 1% of shipped drives. This normally takes a few months to at most a year. Once that is assured, all problems are either misapplication or workmanship defects. With returned G203Vs, the most common damage causes are foreign objects (metal chips, clipped wire strands, liquids, "plasma dust") followed in no particular order by: 1) Inadvertent +Vsupply contact to terminal 3. 2) Blown fuse due to over-voltage or reversed polarity. 3) Blown short-circuit sense resistor due to switching the DC side of the power supply. 4) Workmanship defects (component "infant mortality", cold solder joints). 5) Blown opto-LED current limit resistors on STP/DIR due to >+7V applied to inputs. Finally, yes, two out of three returned G203Vs diagnose as "no problem found". Follow-up causes are misread current set resistors (example: 3.3K instead of 33K), wrong step pulse polarity, miswired motors, etc. Mariss" |
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