1 Topic by IanSparks

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Topic: DaVinci Junior - High Pitched Squeak / Squeal

I have a Stock Davinci Jnr but have noticed that from time to time the printer "squeals" during prints, like someone dragging a nail down a chalkboard. I've levelled the bed N/S and E/W and adjusted the z-offset but the squeal persists.It doesn't SEEM to affect the print.

Today I was printing a cylinder and noticed that the squeal happens exactly during the semicircle on the left hand side of the bed but not the semicircle on the right.

Anyone have any clue as to what might be causing it? The .3w and .stl for the (hollow) cylinder I was printing are attached. Placed dead center of the bed.

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2 Reply by Bozotclown1970

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Re: DaVinci Junior - High Pitched Squeak / Squeal

Have you greased anything on the printer?

3 Reply by IanSparks

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Re: DaVinci Junior - High Pitched Squeak / Squeal

No, have had it for about a year now and never lubricated anything. Recently removed bed and Y carriage cover under the bed to look to see if the squeak was coming from there and to ensure no accumulated dust etc was clogging anything. Replaced and re-levelled bed but squeak remains.

I can move the X and Y carriages without any squeak.

4 Reply by Bozotclown1970 (edited by Bozotclown1970 2017-08-13 14:29:48)

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Re: DaVinci Junior - High Pitched Squeak / Squeal

I would try to lubricate it and also look at the belt rollers and see if they are dry.

BTW, DO NOT use a petroleum based lubricant.

5 Reply by IanSparks

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Re: DaVinci Junior - High Pitched Squeak / Squeal

Thanks, I'll look at that. Lithium grease? Silicone? Stupid question but how would you lubricate the belt rollers (esp. the ones on the Y axis under the bed which I think are likely the problem). I loosened the belt and removed the front idler roller but couldn't feel/see any evidence of lubrication on that one.

6 Reply by Bozotclown1970

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Re: DaVinci Junior - High Pitched Squeak / Squeal

I use a lithium grease myself.

7 Reply by IanSparks

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Re: DaVinci Junior - High Pitched Squeak / Squeal

Thanks. Lubricating the Y axis rollers under the bed seems to have solved the problem. I removed the 3 rollers and lubricated the spindles of each of them. Only one of them seemed to have any factory original lubricant and when I removed the bed and the belt I could see a small slick of it under the roller. Regreased and replaced and my squeak went away.

8 Reply by Grendel

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Re: DaVinci Junior - High Pitched Squeak / Squeal

I use standard large format inkjet rail oil for my printer, its a long lasting non petroleum oil and doesnt dry out (it was designed for wide format (42" width ) inkjet printers that basically run on a similar rail system to 3d printers.