Calibration Repeatability

While doing calibrations, I was worried how much variability there is in the FDM process. This exercise calmed me down. I ran six calibrations, at exactly the same settings as I used on 12/7.

The calibration parts looked consistent start to finsh. Looks like I need a better way to take these picture too….

I’m going to the hardware store and get some painter’s tape, and raise the Z up a bit for the next trial.

Here’s just the photos and details of the equipment I used is after that:

Calibration 01
Calibration 01
Calibration 01
Calibration 01
Calibration 02
Calibration 02
Calibration 02
Calibration 02
Calibration 03
Calibration 03
Calibration 03
Calibration 03
Calibration 04
Calibration 04
Calibration 04
Calibration 04
Calibration 05
Calibration 05
Calibration 05
Calibration 05
Calibration 06
Calibration 06
Calibration 06
Calibration 06

I have many cameras, but I have been using mainly two in my posts. I have a Sony CyberShot 7.2Mp that shot the pictures that follow. Great photos, but I have to resize the images to 1024 px wide for WordPress (using SnagIt Editor). I also like using my old Kodak DC4800 that I have several closeup lenses and several filters for:

Kodak DC 4800
Kodak DC 4800

Also, I have several microscopes and shop scopes. The scope shots at 100x magnification (I think) above were using a flea market Fisher Scientific Steromaster (I used some tape guides on the stage to locate the calibration squares repeatably):

Fisher Scientific StereoMaster
Fisher Scientific StereoMaster

I stick a DCM130 Scope Camera in one side and connect to an old Dell C600 Laptop with docking station. I use a program called Scope Photo to record the images to memory.

DCM130 Scope Camera and Dell C600 Laptop
DCM130 Scope Camera and Dell C600 Laptop

This is the DCM130 unit by itself:

DCM130 Camera
DCM130 Camera

This is the Shop Scope unit that came with the DCM130 when I bought it:

Shop Scope and DCM130 Camera
Shop Scope and DCM130 Camera

I also have a CnCam (optical measuring webcam) I can also use. I got to dig that out for this project too…

–John

2 thoughts on “Calibration Repeatability”

  1. Color me impressed – I would not have expected that level of repeatability. What kind of scope setup do you have? I’ve been musing about getting an Amscope T490B to mess around with (though I’ve recently discovered that I need an electron microscope to really dig into the microstructure of ABS plastic, and that’s a bit outside my price range).

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