SoliForum - 3D Printing Community — Loose drive wheel

Re: Loose drive wheel

2016-04-29T12:55:34Z

OK, that's good information and makes sense—in fact, that's how I first thought it should work. Except, in my situation (I have a Duo) the left extruder is no longer functioning. The path is clean and a load sequence kindof works but only if I apply a little pressure to the filament. So I assumed the drive was failing or a gripper, etc. When I removed the extruders assembly to access the drive and idle wheels, the drive and idle wheel on the still normally functioning right extruder path are engaged—move one wheel manually and it's turning the other. On the nonfunctional left side, the wheels are not like that. The idle wheel is distanced a bit. So of course I then assumed the correct position of the two wheels was as it is on the right side.

Re: Loose drive wheel

2016-04-29T09:14:11Z

You have to distinguish between the DRIVE and the IDLE wheel!

The DRIVE wheel is heat shrinked on the stepper motor shaft - if you turn the wheel you turn the stepper motor!

The IDLE wheel is free moving and will not touch the DRIVE wheel. It is not intended that the two wheels are touching - there is always a gap of 0.5mm between the two wheels.

Re: Loose drive wheel

2016-04-28T22:33:44Z

The loose wheel is normal. It was that way on mine and never contributed to feed problem and others have also commented on it being loose. It is just designed that way. Most likely tl prevent damage in the event of jamming.

Re: Loose drive wheel

2016-04-28T19:00:43Z

I was more curious about the issue with the loose drive wheel v. the calibration issue mentioned in the initial part of the post.

Re: Loose drive wheel

2016-04-28T18:45:55Z

The issue is your bed is bowed and higher in the middle. The nozzle is actually touching the bed and the back pressure is preventing it from feeding. The idler is loose on all Da Vinci printer. It is an intended design since the system is spring loadex. The bowed bed is a very common problem with XYZ printers and the reason everyone puts a 2 or 3mm thick piece of glass over the existing glass to level it out.

Re: Loose drive wheel

2016-04-28T18:41:20Z

Was there any resolution to this issue?

Re: Loose drive wheel

2015-03-14T18:24:58Z

How big of a gap is there? got a picture to show?

Loose drive wheel

2015-03-14T17:59:17Z

I have the DaVinci 2.0 Duo and I was having a problem where my printer would print the calibration line at the start of each print but then would extrude nothing as it started to print the actual object. I thought it might be just the object I was slicing and that the first couple of layers were faulty so I tried printing one of the test pieces built into the printer firmware and got the same result. I tried unclogging both nozzles with the tools given. I finally opened up the extruder to clean out the drive gear and wheel and the silver wheel for the left extruder (extruder 2) is completely loose and does not contact the brass drive gear which causes the filament not to extrude in the left extruder. It's held on with a c-clip but I can't seem to tighten it or push it further back. I have not had the chance to test the right extruder again after cleaning it.