I just found this handy tool. It's a simulator for GCode, where you can watch the movements of your machine.
http://gcodeprintr.dietzm.de/
Just load a gcode file and watch what your printer is doing in a simulation.
I used it for examining the temperature changes in a calibration print to find the right temperature for the extruder.
In another print with two seperate parts, it switched between the parts and so there was some blobbing at an inconvenient place, so i rotateted one part and viewed the movements in the simulator and now the parts are perfect.
So try it out, its free and it's in java, so it should run on every platform.
(I have no affiliation with the developer, it's just a useful tool...)
useful tool: GCode Simulator
Re: useful tool: GCode Simulator
Just downloaded and tried it. Been looking for something like this. I wish it was integrated in slicers, probably will be. Thanks for the heads up 

-"Simpler is better, except when complicated looks really cool."
-"As soon as you make something fool proof...along comes an idiot."
-"I have not failed. I've just found 10,000 ways that won't work." ~Thomas Edison
-"As soon as you make something fool proof...along comes an idiot."
-"I have not failed. I've just found 10,000 ways that won't work." ~Thomas Edison
- jdurand
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Re: useful tool: GCode Simulator
The one that's built into S3D helped me solve a problem with a complex model. I was able to quickly try different things until the simulation showed it printing ok. Then tried the print and other than stringy, it was fine.
Standing on the edge of reality... (me)
Quando omni flunkus moritati (Red Green)
Let no man belong to another that can belong to himself. (Paracelsus)
All things are poison and nothing is without poison; only the dose makes a thing not a poison. (Ibid.)
Quando omni flunkus moritati (Red Green)
Let no man belong to another that can belong to himself. (Paracelsus)
All things are poison and nothing is without poison; only the dose makes a thing not a poison. (Ibid.)