Re: LISA Simpson
Speaking of discoveries: I have found a source for pretty good plywood with thickness options of ¾, 1, and 1 ½”. The stuff isn’t exactly cheap. My guess is that on a 2X larger printer, ¾ by it’s self...
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Quotenicholas.seward I just discovered vented screws. They are normal socket cap screws with holes predrilled. M8's happen to have 2mm holes. I think I might get some and try to convert my hub back to...
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Quoteuncle_bob Speaking of discoveries: I have found a source for pretty good plywood with thickness options of ¾, 1, and 1 ½”. The stuff isn’t exactly cheap. My guess is that on a 2X larger printer,...
View ArticleRe: LISA Simpson
If you are using 608's and you have 4 bearings in the stack, that would use up 28 mm of your 40 mm. A thin 8mm nut will add 2.7 mm. You are down to about 9.3 mm for spacing and what ever you are...
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@uncle_bob: If you mount the steppers to the midplate where do the bearings go. On that note. I am moving my design to 4 plates. 5 if you count under the basalt. I will have the bottom plate which...
View ArticleRe: LISA Simpson
Quoteuncle_bob If you are using 608's and you have 4 bearings in the stack, that would use up 28 mm of your 40 mm. A thin 8mm nut will add 2.7 mm. You are down to about 9.3 mm for spacing and what...
View ArticleRe: LISA Simpson
Quotenicholas.seward Quoteuncle_bob If you are using 608's and you have 4 bearings in the stack, that would use up 28 mm of your 40 mm. A thin 8mm nut will add 2.7 mm. You are down to about 9.3 mm for...
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@A2: While press fit bearings is a good idea it isn't hobby friendly. I use 5/16" or M8 bolts though 608s as my standard setup. However, the bearings always come in pairs and I tension the setup so...
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Multi plate approach: I'm probably missing something very basic about mounting the motors and bearings. My approach is based on NEMA-23's and putting the bearing on the plate that's above the motors....
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slop: The other driver for the metal shaft on a large printer is to drop the hub diameter. If you scale everything up, the hub gets fairly large. sunken build plate: One concern would be sinking...
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Quoteuncle_bob slop: The other driver for the metal shaft on a large printer is to drop the hub diameter. If you scale everything up, the hub gets fairly large. I imagine that some things don't need...
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@A2: I know how to get the shoulder pivot offset to zero but I am at a loss at how you can do it with the hub offset. Well, I know several ways but none of them greatly improve the rigidity of the...
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If the arm is going to be able to drop straight down, the other two arms need to be a bit longer. More or less the arms get into the 1X rod spacing rather than 2/3 spacing vicinity. That either costs...
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Bronze nuts for the Hi-Lead screws came in today. No screws to try them on yet. They are bronze colored and heavy, beyond that nothing really useful to report about them. Hopefully the screws will get...
View ArticleBest Direct Drive or Geared Extruder Mounted to Effector for Delta Printer?
This may have been posted before but I was wondering if anyone's using a direct drive or geared extruder mounted on their effector for their delta printer? What's the best one to use? What are the...
View ArticleRe: LISA Simpson
Quoteuncle_bob I'm probably missing something very basic about mounting the motors and bearings. My approach is based on NEMA-23's and putting the bearing on the plate that's above the motors. The...
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The shoulder offset is the distance from the center of the screw to the center of the arm attachment. The hub offset is from the central axis of the hub to the attachment of the other side of the arm....
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Quotenicholas.seward The shoulder offset is the distance from the center of the screw to the center of the arm attachment. The hub offset is from the central axis of the hub to the attachment of the...
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Bearing mont: Right now my *guess* on the mount is a printed part. The bearing is captive horizontally, but free vertically. It rests on a (hopefully large) washer (or two). The washer is also captive...
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@A2: I think we are talking different things. I will try to make a diagram. Can you make a diagram of your inline arms? @uncle_bob: Won't you have carriage interference if you mount bearings in the...
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