LitePlacer.com forums

I wonder how they deal with the interference when the liquid core of the inductor acts as an antenna? That was the showstopper for me back then. I really needed 20-22 Bit resolution for the things I was measuring and I couldn't deal with the drift of the signal influenced by human bodies walking in...

Picky wrote: Heat does not come from anywhere but current. Could be shorted coils in cheap motor

Yes, that's my theory. Initial heating melts the insulation, causing a weak short, which causes more heat -> feedback loop.

I've killed a few solenoids and autopsy confirmed this was the failure mechanism.

Ok, having being inspired and encouraged, I have reworked my feeder module with the 28byj-48 steppers. I can also put all the electronics on that board also, simplifying the design a lot. Hey neat! I like how you managed to keep the tapes straight by using non-multiple-of-90-degree rotations, I'll ...

glenenglish wrote:Hi
Can the machine be set up to place non polarized 0603 (and above) loose components (resistors, ceramic caps) from loose ?
That is, not on tape, floating around in a tray (limit applied could be they must be upright not upsidedown)

regards

glen

Yes: https://vimeo.com/141762090

I guess one will need a bunch of encoders all around this thing to make it useful. Why? I mean encoders are always great if you have the budget for it. But if you don't, I can't see why this would need encoders to achieve the same accuracy as a conventional stepper+limitswitch design. Of course you...

Upshot: The idea here is to have no motors (i.e. heavy weight) on the part of the machine that moves in the Z-axis. Has anybody built a PnP using two concentric non-captive lead screws for the Z+A axes? Here's how it works: You've probably seen non-captive stepper motors like this one before. The in...

I also realise now I could put hole detectors in series, as only one tape will be moving. One small micro could control a lot of feeders. Or use a PISO (Paralell In Serial Out) chip. They are dirt cheap, like $0.02/pin. I bought a huge pile of NXP 74LV165, they're great, easy-to-solder SOIC package...

I'd be interested to see how you mount the 28byj-48, I had trouble designing something that was compact for 8mm tapes. Here's a snapshot of the work in progress. I expect to have it all finalized in a week or so. If you want the GERBERs I can post them. Much credit due to vbesmens; it should be pre...

I saw that block and was quite interested, but before dropping $150 on it I was keen to see more specs, e.g. what dimensions, number and type of lanes. Hard to tell from the small picture. Yeah, I agree. I took a gamble here and it turned out really well. The small lanes are standard 8mm (the size ...

Please forgive me for being so dumb about mechanical issues... I am learning here... :) I completely understand what you mean about the back gantry plate preventing rotation around the X-axis. The analogous problem for the Z-makerslide, which has no similar secondary gantry+vwheels, would be rotatio...