Bumps or blobs in layers

**billchurch** · 2014-09-03 23:41:15

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Topic: Bumps or blobs in layers

ABS on a SD3 with E3D hot end & upgraded power supply.

I'm getting this (see photo) in my prints. Not sure where to go for this one, any thoughts?

- Bill
---
Solidoodle 3, 350W PS Upgrade, borosilicate glass bed, E3D hot end, plexi enclosure, spiderwire "belt" upgrade. illc0mm on #solidoodle

**IronMan** · 2014-09-04 01:23:31

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Re: Bumps or blobs in layers

Not terribly good at analyzing photos yet, but I have had minimal issues by:
- Leveling the bed
- Calibrating the extruder steps
- Measuring the wall thickness on a single walled cube - looking for about .48mm on a .4 nozzle

Have you leveled the bed to the nozzle by about a dollar bill's thickness?

Also, could be over extruding a bit...what is your extrusion multiplier set to?

SD2 - Stock - Enclosure - Heated Bed - Glass Plate - Auto Fire Extinguisher
Ord Bot Hadron - RAMPS 1.4 - Bulldog XL - E3D v6 - 10" x 10" PCB Heated Build w/SSR - Glass Plate
Thanks for All of Your Help!

**billchurch** · 2014-09-04 01:28:47

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Re: Bumps or blobs in layers

Yeah, I think it's leveling + extrusion multiplier. The steps are calibrated, and this has all been done before. But haven't printed anything in a couple of months, always fun to try and remember what the hell you did to it last!

- Bill
---
Solidoodle 3, 350W PS Upgrade, borosilicate glass bed, E3D hot end, plexi enclosure, spiderwire "belt" upgrade. illc0mm on #solidoodle

**IronMan** · 2014-09-04 01:59:29

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Re: Bumps or blobs in layers

Yeah...it's strange, but you can have an SD leveled perfectly; and a few days later, it's off again...that's why I got into my routine of leveling fairly regularly...if I ever upgrade to a RAMPS or RUMBA on the SD, I'll invoke the auto-leveling system...one of these days!

SD2 - Stock - Enclosure - Heated Bed - Glass Plate - Auto Fire Extinguisher
Ord Bot Hadron - RAMPS 1.4 - Bulldog XL - E3D v6 - 10" x 10" PCB Heated Build w/SSR - Glass Plate
Thanks for All of Your Help!

**billchurch** · 2014-09-04 02:00:29

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Re: Bumps or blobs in layers

Yeah, really want to rework the bed, that new SoliTouch feature looks pretty hot.

- Bill
---
Solidoodle 3, 350W PS Upgrade, borosilicate glass bed, E3D hot end, plexi enclosure, spiderwire "belt" upgrade. illc0mm on #solidoodle

**wardjr** · 2014-09-04 03:11:04

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Re: Bumps or blobs in layers

Are you sure that isn't an extreme case of Moire? When's the last time you adjusted the VREF?
That seems like it's a rather systematic pattern.

Printit Industries Model 8.10 fully enclosed CoreXY, Chamber heat
3-SD3's & a Workbench all fully enclosed, RH-Slic3r Win7pro, E3D V6, Volcano & Cyclops Hot End
SSR/500W AC Heated Glass Bed, Linear bearings on SS rods. Direct Drive Y-axis, BulldogXL
Thanks to all for your contributions

**billchurch** · 2014-09-04 12:48:06

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Re: Bumps or blobs in layers

Never I guess is the answer to that question. Any pointers there, just play with the trimpot until it smooths out?

- Bill
---
Solidoodle 3, 350W PS Upgrade, borosilicate glass bed, E3D hot end, plexi enclosure, spiderwire "belt" upgrade. illc0mm on #solidoodle

**IronMan** · 2014-09-04 13:21:30

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Re: Bumps or blobs in layers

That's one way to do it...or if you have a multimeter:

http://support.solidoodle.com/hc/en-us/ … Solidoodle

BTW, if you can find a ceramic mini-screwdriver to adjust the vref pots, use that. If not, be very careful not to short anything out...very easy to blow a stepper driver!

SD2 - Stock - Enclosure - Heated Bed - Glass Plate - Auto Fire Extinguisher
Ord Bot Hadron - RAMPS 1.4 - Bulldog XL - E3D v6 - 10" x 10" PCB Heated Build w/SSR - Glass Plate
Thanks for All of Your Help!

**billchurch** · 2014-09-04 13:23:07

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Re: Bumps or blobs in layers

Okay, did the multimeter adjustments, ~.25v on the E and ~1v on the XYZ. Looks like that was the trick so far, E was at ~.89, XYZ were a little hot too, ~1.2ish.

Somehow I missed this adjustment before, good to know!

- Bill
---
Solidoodle 3, 350W PS Upgrade, borosilicate glass bed, E3D hot end, plexi enclosure, spiderwire "belt" upgrade. illc0mm on #solidoodle

**wardjr** · 2014-09-04 13:47:50

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Re: Bumps or blobs in layers

There you go

Printit Industries Model 8.10 fully enclosed CoreXY, Chamber heat
3-SD3's & a Workbench all fully enclosed, RH-Slic3r Win7pro, E3D V6, Volcano & Cyclops Hot End
SSR/500W AC Heated Glass Bed, Linear bearings on SS rods. Direct Drive Y-axis, BulldogXL
Thanks to all for your contributions

Bumps or blobs in layers

Posts: 10

1 Topic by billchurch 2014-09-03 23:41:15 (edited by billchurch 2014-09-03 23:42:46)

Topic: Bumps or blobs in layers

2 Reply by IronMan 2014-09-04 01:23:31

Re: Bumps or blobs in layers

3 Reply by billchurch 2014-09-04 01:28:47

Re: Bumps or blobs in layers

4 Reply by IronMan 2014-09-04 01:59:29

Re: Bumps or blobs in layers

5 Reply by billchurch 2014-09-04 02:00:29

Re: Bumps or blobs in layers

6 Reply by wardjr 2014-09-04 03:11:04

Re: Bumps or blobs in layers

7 Reply by billchurch 2014-09-04 12:48:06

Re: Bumps or blobs in layers

8 Reply by IronMan 2014-09-04 13:21:30

Re: Bumps or blobs in layers

9 Reply by billchurch 2014-09-04 13:23:07

Re: Bumps or blobs in layers

10 Reply by wardjr 2014-09-04 13:47:50

Re: Bumps or blobs in layers

Posts: 10