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Printing issues ...
Well looks like system guy may have hit it on the nose. v-ref set to 0.4v and I printed a Prusa i2 Z motor holder standing up without any skip. Heres hoping my luck continues.
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appdev007
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Reprappers
SystemsGuy asked me to check my v-ref voltage. Said it should be 0.4 volts. After finding the locating the tuning motor current seciton of the pololu reprap wiki page I tuned all my motors to 0.4. Some were high and some were low. It seems this is suppose to be check between the metal of the trim pot and the bottom right pin and your motors need to be on and holding their selvs still. I you can v
by
appdev007
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Reprappers
One more tidbit, there was an incident arround the same time as last weekends day of double contstant axis sikpping where my power supply fan quit about three times in a four seconds and you could see there was a voltage drop becuase it affected the performance of the printer. I unwired the whole printer and checked for loose connections and shorts. None found. Only happend this once.
by
appdev007
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Reprappers
SystemsGuy on #reprap suggested I check my rods for scratches to make sure I didn't have a bad bearing. Rods don't seem to have any.
by
appdev007
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Reprappers
monttyle also suggested that I make sure the X motor turns freely without the belt and it does. Printer will even still print after a reboot, but X stops and screams again after a bit.
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appdev007
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Reprappers
monttyle on #reprap suggested I the windings with my meter. Two ohms between coil legs. No shorts between coils.
by
appdev007
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Reprappers
After the box and fan the pololus are staing cool. I can hold my finger on them and not feel much heat. Before they were getting pretty toasty. I cold only touch them for a few seconds. Why did they work this way so long. I appears they didn't shut down unless that's what the bunch of missed steps was about.
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appdev007
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Reprappers
X and y both move without too much resistance when printer is off. X might require slightly more force than Y. Y moves freely with belt off.
by
appdev007
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Reprappers
OK, I have put a pool and a quarter throught my printer and just finally got my print quality looking pretty nice at 0.20. Axis skipping has only happend like five times over the last six months, only once per incidet, and only one axis per incident. Last weekend my X and Y started skipping several times in a row on almost every print (whistles). So, I recalibrated the pots on my pololus. Set the
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appdev007
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Reprappers
It's all over design is better which leads to a more stable printer. It's also eaiser and quicker to build.
Six months ago when I bought my i2 kit it seemed slike there weren't so many i3 kits out there. Now there are plety. Maker Farm even has one. I would go i3 if I was picking today.
However, remember you wanted to print little gears. A delta printer like the rostock might be better for
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appdev007
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Reprappers
If your in the USA I would reccomend one of the kits from Maker Farm. I haven't actually bought their kit, but it's comprable in price to the one I bought from Canada and has some better parts from what I can see. I have ordered some other stuff from them though and the were good to deal with. They have some good reviews here on the form too.
If your looking to print small little gears, you mi
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appdev007
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Reprappers
If I had to pick one part to study and perhaps try to improve, I would probably make it the extruder. I think you will find there are more advacnements that could be made here. Rather they be in the cold end or the hot end or both. Maybe a whole new design all together. Perhas conentrate on smotther plastic flow and consistancy with compensation for variations in filament diameter.
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appdev007
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General