gchristopher wrote: I bet the most likely result would be the bed being even more anemic.
Yeah this is what I am gathering from other discussions.
Not to sidetrack but there's basically 2 ways of doing the 24v bed right?
(1) atx power supply for everything (minus bed) + (1) 24v power supply that strictly heats the bed through a relay controlled by rambo's 12v bed heating output.
OR
(1) 24v power supply for everything (after being regulated down to X-vdc for specific components
And past that there is back and forth about fitting everything in the platform or not to for looks or heat or portability etc. Is a large problem the fact that the stock PSU just doesn't have enough muscle for everything? What if, say, I have a crydon SSR on its way, and a pair of 930W power supplies (12v) from a server sitting in my shop. Could a person simply use a relay to supply voltage to the bed heater from a separate source, much like a 24v mod, but even at 12v, just to take the pressure off of the stock power supply? I realize that the bed is only going to use so much power regardless of how much power the supply has to offer, but if the stock power supply is close to browning-out or just simply cant supply the amps to the bed, would it be worthwhile to use a separate power supply just to heat the bed, if even only at 12v? (which could easily be swapped for 24v later too). I guess at a certain point i have to just see how it is first before i get the cart any further in front of the horse.
I'm comfortable daisy chaining power supplies and such. My home computer is a retired mining rig that has 4 video cards quad-crossfired
and 2 power supplies to power it all. Pulls as much power from the wall as a microwave if you really load it up haha. So i already have a ton of hardware for frankensteining computers or similar.
back to dual extruder stuff.
Has anyone ran into problems with the weight of extra stuff effecting the vertical movement of the carriage? my goal is to be at or below the weight of the factory components. i started thinking about this when looking at designs that mounted the ezstruders directly to the platform. but regardless of that, and this may be a larger question for all delta printers. should the effector platform be suspended neutral to the motor? Rather than depending on the holding force of the stepper motor? i.e. elevators, giant counterweight that offsets the elevator so that the motor basically is just used to accelerate the mass of cargo up or down. Like, I'm imagining a pulley and weight system on each tower that holds up on the carriage just enough that it acts as if in zero-g. In Cartesian printers, each axis is supported by the bearings, or a lead screw on the Z axis. so naturally the x and y axis only have to accelerate the mass of the printer head back and forth. If the motors that run the position of the carriage are in an open loop (are they?) and don't have any absolute position encoders, would it be possible for the motor to have too much load and not make a step (therefore position=wrong)
I let my adhd run with this idea for a while and sketched up a few ideas in my handy dandy notebook of a delta printer using vertical ball screws to position the three carriages with encoders attached to the end of the shaft to give absolute feedback. Now you have a closed loop and (should) never have to worry about mid-print coordinate shifts/errors. I was thinking about this because if one were to make a delta printer beefy enough to instead hold a spindle motor (or a dremel) to make a desktop mill, you could get crazy with the programming, (way way above what i could ever imagine to do), and set it up so you could tip the platform and effectively make a 5+ axis machine. I realize there are some rotational degrees of freedom that would have to be addressed in the arm linkages that keep everything square with the world, but i haven't gotten that far yet.
I need to quit typing and putting off working on siding my house, so I will leave you on that note.
-Peter Muzzy
