Add ons and tips (video)

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Add ons and tips (video)

Postby wd5gnr » 2012-Dec-Mon-12-Dec



mod note: you can wrap a video URL in [youtube][/youtube] and will show up viewable in-line. make sure its not https. only http. if you have a URL that is https try removing the "s"
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Al Williams
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Add ons and tips (video)

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Re: Add ons and tips (video)

Postby Alexcheve » 2013-Feb-Mon-23-Feb

I see you attached a wire around the extruder to prevent it to move. It is a crucial thing to do and there was no mention in assembling instructions.
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Have Printrbot+ kit struggling assembly from January 12 to 18, use ABS for now. Cracked glass with three bolts with strings at HotBed. Am not able to print a thing yet but getting closer thanks to you.
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Re: Add ons and tips (video)

Postby RetireeJay » 2013-Feb-Tue-10-Feb

Very nice.

I see you have the same problem with Repetier Host that I do... namely the graphics on the screen are so large that the information doesn't all fit on the screen at one time, forcing you to scroll. IMHO, the graphics would be just as effective if they were shrunk a little so you would not have to scroll the sub-windows to see everything. I've put a posting on their forum about this (but no responses yet). Nevertheless, I think Repetier Host gives a better human interface than Pronterface, with more control and better feedback.

(Also, I guess you have studied some French, as have I. We have a natural tendency to pronounce foreign-looking words in the "native" way (re-pet-ee-ay). I like that better than re-pet-ee-er.)

So what DOES happen if your nozzle bottoms out on the bed before the Z-axis zero switch is hit? The motors keep on turning but now it looks like your bridge will be pulled down by those clamps - so instead of just gravity pushing on the nozzle you will have quite a bit more force! Or am I missing something?

By the way, my Z-nuts are currently held by the factory stock slots in the holders, and every time the bridge is lifted for a move, the nuts rotate about 1/12 of a revolution before the wood catches them going in the other direction. In other words, I have significant hysteresis in my Z axis. And apparently the version of firmware on the Printrboard does not implement the G-Code provisions for hysteresis. I think I want to design and print some kind of capture for the nuts that will reduce or eliminate this hysteresis while not entirely preventing the nuts from backing away from the bridge in case of a collision.

So much to build, so little time...
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Printrbot Plus operational January 2013
Brass threaded rods (5/16" X 18) & nuts for Z axis
GT2 belts & pulleys
Cable chain to reduce probability of fatigue failure in wires
E3D V5 Hot End, 0.4mm nozzle, also 0.8 and 0.25 in use occasionally
PB fan mount + 40mm fan -- using printed mount adapter, not the E3D supplied fan
Injection molded extruder gears
Optical Z "endstop" (custom designed and built)
Have used many pounds of T-Glase filament. Now also doing some work with Ninjaflex SemiFlex
Print on glass with Scotch Craft Stick or other glue stick
"My next printer is..." Prusa i3 MK3
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Re: Add ons and tips (video)

Postby wd5gnr » 2013-Mar-Mon-19-Mar

My study of French was limited to growing up in the New Orleans area ;-)

I currently have hacked up delrin ACME nuts and other than being a bit ugly they fit SNUG because I had to Dremel them to fit.
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Al Williams
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