How to avoid holes in the top end of your printing

Good Day,
I just want to ask how to avoid holes in your 3D print in skeinforge.(See first image).
I printed the same object in makerbot same settings and the print doesn't have any holes in it.(See second image).

My setting in skeinforge:

Carve:
Edge with over height ratio: 2.67
Extra decimal places: 1.0
import coarsness: 1.0
layer height: 0.15

layers:
layer from: 0
layers to: 912345678

Mesh type: correct mesh

Fill:
Diagphram:
Diagphram period: 100
Diagphram thickness: 0

Extra shells
Extra shells on alternating solid later: 1
Extra shells on base 1
Extra shells on sparse layer 1

Grid
Grid circle separation over perimeter width: 0.2
Grid extra overlap 0.1
Grid junction separation band height 10
Grid junction separation over octagon radius at end 0
Grid junction separation over octagon radius at middle 0

infill:
infill begin rotation 45
infill begin rotation repeat
infill odd layer extra rotation 90

infill patern
Grid rectangular
infill perimeter overlap :0.15
infill solidity 0.2


sharpest angle degrees: 60
solid surfae thinckness 5
start from choice nearest
surrounding angle 60
thread sequence choice loops>perimeter>infill

SPEED
bridge feed rate multiplier 1.2
bridge flow rate 0.9

duty cyle
Duty Cyle at beginning 1.0
Duty cyle at ending 0.0

Feed Rate 30.0
Flow rate setting 1.3511

Object first layer
Object first layer feed rate infill multipier 0.1
Object first layer feed rate perimeter multipier0.1
Object first layer flow rate infill multipier 0.4
Object first layer flow rate perimeter multipier 1.0

travel feed rate 30.0


Settings:
Object infill: 0
layer height:15%
number of shells: 1
Feedrate: 40
Travel Feedrate: 70
Print temperature: 230

Plastic:
Filament diameter 1.82

Extruder:
nozzle diamter .4

And my settings for makerbot

Quality:
Infill: 0%
Number of shells: 1
layer height: 0.15

Temperature:
left extruder 230c
build plate: 105c

Speed:
Speed while extruding 40mm/s
Speed while traveling 70mm/s

Im using flashforge Creator

Edited 1 time(s). Last edit at 01/20/2014 03:20AM by tykola.

Quote
tykola
Feed Rate 30.0
Flow rate setting 1.3511

What version of skeinforge are you using ? In any "modern" version those 2 settings should be identical. I highly suggest you use 0.50 (the last release).


Also if I read right you are going faster in makerforge, which could help avoiding the top from melting from the hotend heat radiation - the hotend stays longer at the same place with your skeinforge settings.
Another possible difference is the fact you do multi materials in makerware, it might give the layers some more time to cool down while switching to the 2nd hotend.
So actually, no those are not the same settings for the 2 softwares.


Are you using any active cooling (fan on the part) ? It's a basic to get successful prints with those kind of shape which have a narrow zone atop. That or printing multiple instance of the part at the same time, the goal being letting a layer cool down before coming back to print the next one above it.

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Most of my technical comments should be correct, but is THIS one ?
Anyway, as a rule of thumb, always double check what people write.