Largechris

Not going too smoothly with the magnetic build plate I brought. Now the plate won't home, I realise this is due to the added thickness. The only video I can find is someone putting some new bolts in to lower the optical sensor trigger by 2mm? I'm getting confused

Ok thanks, I've already clicked on the link to buy a magnetic build plate lol. I'm assuming that the idea is to leave the build plate permanently attached and after each print just wipe it off in place to clean it?

Ah yes I can see magnetic build plates would help - in a way I was hoping to avoid buying myriad add ons lol but that would be a handy addition.

Interesting, thanks. This is inside my house so everything at a steady 21 degrees. I can easily try and warm the resin a bit, but over the course of four hours printing (for example) it will cool back down to room temperature anyway? Looking at the failed print a bit closer, the bit I've highlighted has printed out as a "plane" rather than the 3D cube structure, like it's kind of fallen apart as it was printing maybe? TBH, I was impressed it worked the first time as the structure is pretty thin and delicate looking. Obviously I will try a few different test projects, so long as I'm not doing anything obviously wrong. My first impression actually was that there were fewer adjustments (ie nozzle temperature etc.) with resin than filament printing, and hence less to setup wrong.

Hello, I'm just starting out with 3D printing, on an Anycubic Photon. I printed the test file, an open cube shape, successfully, beginners luck, very impressive. I then recovered the resin through the supplied filters, and the following day tried to do exactly the same print again.... and failed. The base worked, was properly attached to the plate, same as before, so I don't think it was a levelling or gapping issue? I've ended up with a slightly melted cube as per the pictures. The only thing I can think of was the timer ran down quicker than I thought so it might have been hanging finished for an hour or two, before I removed the print, would that have caused this?

That was my guess from what I was reading on my cheapo meter... anyway easy way to resolve this - Statistically 64% of forum members have a Duette to hand. I'm sure one or two have the requisite tech to get an accurate measurement. Just for interest.

Perfect thanks

Tried to get a measurement but don’t think my Voltmeter was really upto it if it’s that lumpy, was reading maybe 16V DC and 17.2V AC but would need an oscilloscope or something to prove some numbers.

What can I say, I have a magic touch with electrics... Should be 12V DC off the right hand side of a trusty H+M Duette, and 16V AC off the left hand side... I will double check the power supply Voltages tonight....

Many thanks, Slightly terrifying... yes in my head I thought one relay per PM coil would sort out the change over problem, but blimey that's so many components to wire up correctly. (Sometimes I wonder if my blind loyalty to Peco is not helping, and whether using a more complete and engineered turnout solution eg Kato, Rocco etc. , even it costs a lot more, would save so much faff.....)

Thanks, tonight I’ve tested on my particular CDU and on 12V DC input I get 19.2V out, and on 16V AC input I get 21.0V out. I also doubled up the return wire, didn’t make a difference. However after poking around with the meter it seems I have a few shorts on the diode matrix that I need to sort out as I suspect I’m trying to drive more than the intended number of points on each push button switch. If I do end up with small CDUs for each point I could still do with some recommendations on suitable relays please?

I was wondering that, there's a power transistor on the CDU board, so didn't know if other components in the CDU would need uprating. Individual CDUs sound like an option but you must need relays, which type do you use?

Yep that makes sense, the bigger CDU is on order anyway so depending on the results of that and using 16V AC, plus the bigger return wire (two minute job), I will price up relays versus another diode matrix, thanks

Ok I will check the CDU output Voltage tonight and see if it varies according to 16V AC input or 12V DC input cheers

Yep, a common return, I saw there was already a lively debate on this board about core sizes required for pulsed current with answers varying between size for biggest pulse (21 Amps in my case maybe so at least 2mm wire) and sizing for average current... anyway that's no big deal I will triple the return wire to 3mm.