Repeat prebuild.... Prepeat

Mostly Printed 3D Printer - MP3DP Advice
#1

After seeing how long it’s taking LR3 components to get anywhere, i thought I’d get a shopping list together now instead of waiting to finish the draft table (got some MDF for that guy today).

Pretty sure this one needs to be direct drive for squishy plastic, but I haven’t chosen a hotend or extruder yet. I’ve never been up on what’s what in this area, either, so I’m not sure which way to go. I know it was developed with the Hemera in mind, and the H2 looks similar and very light. Something else? I’d like to reserve the option for high-temp plastics as well, so I’m saving the dual-extruding PLA for the next build after. edit: just saw the orbiter 2.0, looks like fun.

Also, Google is letting me down. I was searching up mgn12h rails on amazon, and I came across a listing for mgn12h blocks on an LML rail. I found a reference to lockable bearing blocks, but these blocks aren’t those. The rail doesn’t look any different to me. It’s it just the naming convention of the rail vs the block?

https://www.amazon.com/dp/B08PKY5RHZ/ref=cm_sw_r_apan_i_X13BBRBKZX5M6MG13FZR?_encoding=UTF8&psc=1

Dug out a board I bought, and it turns out to only have 5 drivers, so I’ll need to get a new one. Any reason not to get the skr pro that Ryan used? I also have 5 TMC2208s that I bought with it, so maybe just pick up one extra and use them?

Finally, I’ve got a couple of the full graphic lcd screens kicking around. What will I miss out on using one of those instead of the TFT?

TIA

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#2

Hey Tony, I look at the link you posted and something does not look right to me, the last picture looks like the rail is upside down.
When I build the printer, I had left over rails from a previous project, so I didn’t need to buy any, but here is the link from Amazon, MGN12H for what I use.

No reason at all, If I am to build another one I will get the board from him.

Yes, you can do that.

When I first build the printer, I used the TFT screen, the touch mode is not quite there, and I end up using marlin mode only. So… you can use the full graphic lcd if you don’t care about touch mode.
As of today, I’m running Klipper and Fluidd headless, but I’m planing to add a 5 inch LCD Touch Screen that has been seating in the shelf for about 2 months, I just need to find time to move and re-wire the Raspberry pi.

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#3

Yeah. It looks like they’re showing the bottom. The bearing block is upside down, too.

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#4

Right, that’s what I mean, kinda strange though.
I would go with something else…

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#5

Will the xyz steppers from an Ender 3 suffice for the bed? They are kinda dinky and no gearing, but there ARE three of them…
I don’t have any other projects in mind for these, so they are collecting dust.

Also, what about sensorless homing? I think I read that it’s less precise (repeatable) than switches, but does that matter for anything other than restarting failed prints?

#6

I dont think the Z steppers are going to be too picky, should be OK. The Z axis might not move as fast, but that isnt needed most of the time.

I use the SKR Pro 1.2, it’s a good board. I’m experimenting with a RepRap Firmware port for it. I think the next step will be to actually connect it to the printer, but I’m waiting until I have more of a gap between print jobs. At this rate it will be put int practice on the kids’ Repeat build…

#7

Awesome, thanks. I guess if they end up not being able to hold up the plate + print or whatever, they’ll be easy to swap out anyway.
I just placed an order for the board, drivers, rails, wheels, pulleys, and cf tube. Ended up getting 2209s, since I couldn’t find just one, 2 were almost 10 bucks, and this way I can store the 5 socket board with the 2208s. Just gotta find a project for those, now.
edit: up to $490 already…mosquito + LDO Orbiter 2.0. Looks like all I’m reusing from the ender is the hot bed and power supply.
If this goes well, I might get to build another…dual extruder bowden.

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#8

Current printer board got the usb socket ripped out. This will make it difficult to print the parts I need.

Working on the archim now, maybe I’ll get it to work. Otherwise, out comes the rambo!

#9

Got the z rails today. only 200mm, but I ordered 550. BOOOOOO.