[rp-ml] Problem with SLA 250/50

[Jim McMahon]

The clues to pay attention to:
The machine is 1995 vintage. 23 yrs old.
The problem began during a build.
The machine uses an older electro-mechanical hard drive.
The door open data is checked consistently for safety reasons.
The door open jumper changes the voltage on a component to indicate an
error. Any break in the door open circuit will trigger this error. (
Voltage level change) Voltage is normally 5 vdc at connector when door is
open. Shunting connects it to circuit common and so current is passing this
this all the time.
5 volt DC supply could be too low. The wiring connectors back to circuit
board may be oxidized from 20 years of heat. The hard drive may need to be
scanned for bad storage bytes. Or the component on the board may have
failed. Check each item until you find problem.

On Feb 19, 2018 1:55 AM, "Solid Concepts" <prototype at solid-concepts.com.au>
wrote:

> Good morning Rapid Prototyping Community,
>
> I hope you are all well and that perhaps someone can help me solve a
> problem related to an SLA. I have an SLA 250/50 from 95.
> The machine has been upgraded with a solid state laser and was working
> perfectly well until, during a built, it stopped with a
> message saying that the door was open. Impossible to restart the machine,
> during the rebooting the same message shows up.
> I have checked the cables and even closed the connection making a loop at
> the switch, all to no avail. The operating system is
> DOS I have even tried another VAT controller but the same message comes
> up, "door is open, please shut door to continue"!
>
> Can someone please help me resolve this problem? Do you have any
> suggestion as to what could cause this anomaly?
>
> Thanking you in advance.
>
> Kind regards
>
> Francois Primon
> Director
>
> Solid Concepts Pty Ltd
> Unit 17, 64-66 Bannister Road
> Canning Vale WA 6155
> www.solid-concepts.com.au
>
> Tel: (08) 9455 5377
>
>
>
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