Re: LISA Simpson
PVC might be cheaper than any kind of wall. Bottom end of PVC tube can be cutted by the diameter of the tube and pass through the bottom base. You keep the threaded rod tension, half the tube is still...
View ArticleRe: LISA Simpson
I have used carbon tubes on my repraps, and M4 threaded rods thru them to fix the construction. The frame gets really rigid.... I have been planning to test 20mm pvc tubes, or even printed tubes to go...
View ArticleRe: RepRap 3DR Delta printer Released
Hi Andy, Thanks a lot again for your help, I finally understood the process and was able to reproduce it... anyway I had to do 13 iterations from the real smooth rod radius dimension I measured with...
View ArticleRe: LISA Simpson
Well thats a cool idea, hide the rods inside the tube! You just have to cut a slot into them, not even all the way, because the arms wont move all the way up and down to the bottom. That way you...
View ArticleRe: LISA Simpson
Another interesting variation from the prolific brain of Nicholas. For additional stability and appearance enhancement here is my contribution to this design progression. I envision the corner post to...
View ArticleRe: threaded rod instead of belts
Thanks for the replies. I was thinking of getting something along the lines of 5tpi (approx. ~5mm). This would bring it up to at least 100mm/s. The reason why I thought this would be a good idea was...
View ArticleRe: Worm Drive Grounded Delta Printer
13. Well it turns out that my design for the end effector isn’t quite right. The peek insert is transferring too much heat into the bearing of the effector, softening the PLA. I think I will have to...
View ArticleRe: LISA Simpson
Nicholas I know these rods are not ideal but I thought it would be okay for proof of concept bot ? 3/8 -10
View ArticleRe: LISA Simpson
@Dannydefe: 2.54mm per turn is not enough. For most steppers and drivers this will top you out at 25.4mm/s. I think the top speed should at least break 50mm/s. For $60 you can get 25.4mm per turn. I...
View ArticleRe: LISA Simpson
I need some help from you guys to figure out the home sequence. The problem is you can't just run each end into an end stop. The z height can change for a shoulder nut without its stepper turning....
View ArticleRe: LISA Simpson
Watching the youtube video again, it seems like the bottom few inches of travel on the rods are wasted. If the steppers were a touch higher than the bed, you could increase build area for free. That...
View ArticleRe: LISA Simpson
@jason.fisher: I thought about that. There are a few concerns. 1) It makes the stepper mount more complicated. Remember that you have to tension the rod between two bearings to isolate from stepper...
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Re: Worm Drive Grounded Delta Printer
13. Hot end heat management: Place a heat shield in the form of a large aluminum washer between the hot end and the PEEK. This would act as a heat shield, and heat sink which should radiate some of...
View ArticleRe: LISA Simpson
I was thinking that if you had the entire rod length to travel without interference, you could use some kind of conductive tape on the resting point of each rod end and run through a movement pattern...
View ArticleRe: RepRap 3DR Delta printer Released
Hi Dolphinboy It sounds like your EEPROM is disabled. Check that section in Configuration.h. Andy
View ArticleRe: Worm Drive Grounded Delta Printer
@ JamesNewton It would be difficult, but not impossible to manually reduce the diameter, and maintain a concentric relationship with the the thread body. I would question how ridged it would be under...
View ArticleRe: 3DR Part Sourcing
Does anyone know where to get the anti-backlash springs he uses on the extruder arms?
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Re: 3DR "Simple" Delta Printer
Here is a quick update of my progress. I've started the final assembly and hope to have it printing again soon. In this photo, you can see the jig I've used to ensure the rods are all exactly the same...
View ArticleRe: 3DR "Simple" Delta Printer
Hi JohnSL, Thanks for the update on your build. I notice you are not using the spiral bed clamps from your GitHub files. Watching your build updates and making prints from your Thingiverse files for...
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