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Cart not moving #12

Open hackehucke opened 1 year ago

hackehucke commented 1 year ago

Hey! Awesome Project!! I am building it myself right now, see picture below. Only problem: The cart is not really moving, even when weight is attached. Tried different bearings. Did you have similar issues?

IMG-4421

Best regards!

IVProjects commented 1 year ago

Hi, thanks for sending a picture! Yes, I had some issues with this as well. I did two main things to fix it:

1) Bearings typically come lubricated with grease. This allows them to operate under high loads, but also increases friction. Since these bearings won't experience any high loads, it's best to remove the grease. An easy way to remove the grease is to spray WD-40 or a similar thin oil into the metal bearing shields. The thin oil will displace and thin out the remaining grease, deceasing friction.

2) On my printer, the Z-seam on the wheels provided a sticking point in their rotation. The best solution I found was to print the wheels with a "random" Z-seam location setting within the slicer. This still had a fair amount of friction, so I used a drill and a piece of sandpaper to lathe them smooth.

After doing all this, the cart started moving properly for me.

It looks like you 3D printed the wheel axles. That may work just fine, but since they're lighter than the 5mm steel rods I used you may need a slightly heavier weight to compensate. The weight I used was a piece of steel 3/8" square bar, around 1.5" long I think.

Let me know whether these things help!

hackehucke commented 1 year ago

Hi!

Wow, thank you so much for the quick response! I put on some WD-40 and it works like a charm already. Maybe in the future I will also print the wheels another time as you suggested. But for now WD-40 was enough.

I will send you pictures and videos when it's finished!

Best regards

Am Sa., 5. Aug. 2023 um 21:47 Uhr schrieb IVProjects < @.***>:

Hi, thanks for sending a picture! Yes, I had some issues with this as well. I did two main things to fix it:

1.

Bearings typically come lubricated with grease. This allows them to operate under high loads, but also increases friction. Since these bearings won't experience any high loads, it's best to remove the grease. An easy way to remove the grease is to spray WD-40 or a similar thin oil into the metal bearing shields. The thin oil will displace and thin out the remaining grease, deceasing friction. 2.

On my printer, the Z-seam on the wheels provided a sticking point in their rotation. The best solution I found was to print the wheels with a "random" Z-seam location setting within the slicer. This still had a fair amount of friction, so I used a drill and a piece of sandpaper to lathe them smooth.

After doing all this, the cart started moving properly for me.

It looks like you 3D printed the wheel axles. That may work just fine, but since they're lighter than the 5mm steel rods I used you may need a slightly heavier weight to compensate. The weight I used was a piece of steel 3/8" square bar, around 1.5" long I think.

Let me know whether these things help!

— Reply to this email directly, view it on GitHub https://github.com/IVProjects/Engineering_Projects/issues/12#issuecomment-1666590315, or unsubscribe https://github.com/notifications/unsubscribe-auth/A3AZR2ZGGMPTLDX4DN3G6MDXT2PMJANCNFSM6AAAAAA3FLJGH4 . You are receiving this because you authored the thread.Message ID: @.***>