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maggie_shah

Mini CNC Laser Engraver

by maggie_shah Mar 28, 2019
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Rail Frame very fraglie.

Hey does anyone know where I could find these materials I want to make this as soon as posable

Look on AliExpress, but the delivery possibly takes longer.

Hi, seems like there's one part missing: the small piece for the stepper shaft rod, it's in the photo with all the parts.

can these also be printed with PLA, instead ABS?

Yes, I even prefer PLA over ABS and I think that it works either way

How much would this cost for materials other than the filament?

Did you ever find out?

Nope I never did. The creator never responded.

Achtung!!!
es fehlen die Löcher bei Frame Side in der Druckdatei!!!!
Daumen nach unten!!!!

Leute wie du haben hier einfach nix verloren!

Aaah Misuse, maybe this is the case. You downloaded this one which is a little messed up by the guy who took my design and made it as his own :)
Yes this one actually has no mounting holes, this is true! I just checked it.
Unfortunately I have no access to those files at all :( and I can't update/upload correct stl files.
You can download original design from my thingiverse where I fixed this issue (https://www.thingiverse.com/thing:3193759)

Mini Plotter CNC
Comments deleted.

Amazing Project. My son and I are building it. Quick Question... Where did you source the springs?

Would be nice to post also an original source which is mine design. You can see it here: https://www.thingiverse.com/thing:3193759
(and more) https://www.thingiverse.com/Dr_One_aka_Layer_Man/things
but anyways .... enjoy :P

If somehow miraculously you've designed something almost identical to me ... then apologies ... but it seems impossible :)

Mini Plotter CNC

Nice design. I see you're using 4 x meta bars. I though you'd only get one metal bar per DVD?

Thank you thank you, the original design was made by myself. He just "borrowed" it, chopped base and forgot to mention that he is not an author of this Micro CNC/Plotter but ... well ...
In regards to the bars/rods, some DVD's got 1 some 2 so depending on what model you actually found/have. If you wish, I can redesign it to be able to use single rod but with two is more rigid :)
By the way, my design is now little bit changed/modified added a pen holder and few improvements.

Regards
Dr_One_aka_Layer_Man

Just what I need thnaks for sharing

Could you please upload native format or STEP files?
Especially the slider. guide & rail frame
Thanks!

Dont the stepper motors get to hot with the 4988 stepper drivers?? they only operate at minimum of 8V which is over voltage for the 5v stepper motors is it not?

The 4988 drivers are current source limited, and adjustable using a potentiometer on the board, so this will only be a problem if they are set too high.

No the problem with the 4988 is they are minimum 8V to 35V ( see data sheet https://www.pololu.com/product/1182 )and those Cd-rom stepper motors are maximum 5V, Regardless how low you set the potentiometer you will still not be able to turn 8V into 5V ! the correct off the shelf drivers would be the DRV8834 https://www.pololu.com/product/2134 .

The FAQ on the Pololu page covers this

"Q: I want to control a 3.9 V, 600 mA bipolar stepper motor like this, but your A4988 stepper motor driver carrier has a minimum operating voltage of 8 V. Can I use this driver without damaging the stepper motor?

A: Yes. To avoid damaging your stepper motor, you want to avoid exceeding the rated current, which is 600 mA in this instance. The A4988 stepper motor drivers let you limit the maximum current, so as long as you set the limit below the rated current, you will be within spec for your motor, even if the voltage exceeds the rated voltage. The voltage rating is just the voltage at which each coil draws the rated current, so the coils of your stepper motor will draw 600 mA at 3.9 V. By using a higher voltage along with active current limiting, the current is able to ramp up faster, which lets you achieve higher step rates than you could using the rated voltage."

interesting info but, nonetheless i was never able to get them to working while staying cool! no matter how low i set the current too! have you tried it or not yourself?