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Tool 1 and 2 pull with less force

I had to replace the B and C parts in the Chameleon as the tubes fell out of the grips that used the brass compression fittings. I cut the PTFE tubes and they seem to grip well in this. But, it seems tool 1 and 2 pull with less force than 3 and 4 now. Because of this, I printed the +2.0 tension adjusters and put those in. Tool 1 and 2 still pull with less force and have trouble rotating a full spool of filament on a mount (tool 3 and 4 do this fine). Visually, it seems the drive gear is pushed further into the bearings on the tool 3 and 4 side than the tool 1 and 2 side. Any ideas on what I can do to solve this? Thanks.

4 comments

4 Comments

Bill

Mar 08

I you're seeing them off centered, then the tension +2 for example, won't help that... You need to use the other axis and switch one to a +.25 and the other to a -.25 bearing offset to adjust the center position of the gear between the bearings.

Then adjust the tension accordingly.

Unknown member

Mar 08

Replying to

I'm having a little trouble understanding what you mean. Here is the Chameleon when pulling from tool 1:

IMG_1172

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And here it is when pulling from tool 3:

IMG_1173

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As you can see, the drive gear gets pushed into the bearing on the tool 3 side while on the tool 1 side, the gear barely touches the bearing. The bearing sporadically spins with the drive gear on the tool 1 side but spins with the drive gear on the tool 3 side.

I also have attached the drive gear placement after loading tool 3:

IMG_1174

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And after tool 1:

IMG_1176

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In both cases, the drive gear seems closer to the tool 3 side.

I think the drive gear is just off-centered as you mentioned in your answer. When you say I need to use the other axis and switch to +.25 and -.25, are you referring to changing the bearing offset on the exposed bearings attached to lower motor in the pictures? This would make sense to me as I think it would move the top further away from the tool 3 side and closer to the tool 1 side. If so, how do I do this? I haven't seen other forum posts where this is done.

Unknown member

Mar 08

hold the chameleon in your hand, not in a 45-degree angle. hold it straight and see if you see a difference. I printed my own and it seemed to pull better

Unknown member

Mar 08

Replying to

Unfortunately, there isn't a difference at a different angle. Thank you for the suggestion anyways though!