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Equipment/Stratasys FDM 1650: Difference between revisions
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===1-6-2014=== | |||
After providing spare hands to tgreer in trying to get the new controller wired in for the open-day, I noticed both motor connector plastics are extremely perished. Sockets and plugs. The Y-axis (?) stepper connector has previously been bodged. Pins no longer make good electrical contact with bodged SIL connector. This is both due to bent pins that have apparently been forced, but also the SIL socket terminals sliding freely in their plastics. Pins on stepper are also able to move into the motor body when pressed! Attempting to press another connector onto them will likely push them all the way into the motor housing, rendering the motor useless. | |||
As the motor pins still pass continuity tests, this severely damaged connection seems the likely reason for the motor skipping phases. | |||
My recomendation is that flying leads are soldered directly to the damaged pins and connected to a seperate connector that can be fixed to the chassis. Possibly a DB9. | |||
Replacing the steppers entirely is a possibility, but will be tricky due to the capstan-drive. Removing the stepper will probably mean re-winding and re-tensioning the system. | |||
The capstan drums seem at risk already however, as the (nylon?) coating on the steel cable is severely deteriorated, cracked and flaking off. Once the coating fails sufficiently to expose the cable, the cable will begin to eat into the surface of the aluminium capstan drums, ruining them. The drums are not likely to be easily replaced, the motors and cable are. | |||
While the cable is fine for testing use, if the Statasys is going to be used frequently, new cable should be sourced as a priority. | |||
- Sci | |||
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