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Morgan, Wally, and many others too strange and wonderful to be described here. Previously named "Polar bots and Robot Arms"
Re: I have a questions about software for a CNC router. - 5 years ago
QuoteDoes the CAM software generate the g-code and the control software accepts the g-code and runs the machine? Yep. The control software for most hobby CNC's is GRBL, which requires a PC to stream G-code commands via USB (unlike 3D printers which can usually run standalone). I use a free program called Universal G-code Sender. The G-code can be produced any way you like, even writing it by haby dekutree64 - General
Re: Thoughts on my design please 
- 5 years ago
I'd recommend adding a third Z screw like Pandaym's design discussed in this thread That will prevent the bed being able to tilt in the forward/back direction (the rail blocks prevent it to some degree, but probably not quite good enough) and allow for bed leveling without needing to have the bed float on springs. The magnetic bed mounts shown in that video are a brilliant solution to thermal exby dekutree64 - CoreXY Machines
Re: Kinematic systems and linear guides - 5 years ago
QuotepandaymSCARA would indeed be an interesting choice! How far did you get along with that? Constraining the bed like I described has a disadvantage when it comes to thermal expansion. Therefore I constrained the bed frame that way, and designed a mounting option for the tooling plate to ensure that no stress or warping is introduced as the bed heats up. I used the constrain pattern from a kelby dekutree64 - General
Re: Kinematic systems and linear guides - 5 years ago
QuotepandaymI also absolutely agree on the cantilevered Ultimaker bed - this part of their design they can keep to themselves. On my corexy I have 3 Z motors with lead screws on flexible couplers. This along with 2 linear rails feels like a solid Z setup, that I will probably bring over to my next printer. Generally I am a fan of constructions that have the correct number of constrains - no moreby dekutree64 - General
Re: Kinematic systems and linear guides - 5 years ago
I do like the look of that crossed rail XY system. The moving bed is good for milling where you need high rigidity and movement is slow enough that momentum is negligible, but it amazes me 3D printers can yank it back and forth as well as they do when printing narrow zigzags. Also not good for tall skinny things. What I don't like about the Ultimaker design is the cantilevered bed, especially ifby dekutree64 - General
Re: Any inexpensive robot arm kits using stepper motors? - 5 years ago
QuoteMechaBits Doubt this is what you need, but if you aint seen it already, nice robot arm but not steppers He was working on his own but also with brushless. Skyentific does have a good stepper arm design: It uses all belts, so not much load capacity but excellent precision. Not a lot of reach either, but with the bed on a rotary table you could probably do some good printing with it.by dekutree64 - Polar Machines, SCARA, Robot Arms