Vermes
Advanced Member level 4
This is a project of processing of a very popular station – PT968. Two things in it need to be modified:
- disable the vapor extraction after hanging the flask to stand (noisy and unnecessary operation of the pump)
- mute the work by removing the effect of a metal ball in the indicator of blowing force
Switch of the extraction was made on a mini limit switch with NC contacts 3A/250VAC. The limit switch was located at the collar base of the flask in such a way as to not interfere with the insertion of the flask and can attach after hanging it.
The cable in a cover resistant to high temperature in the back of the station.
A cable was soldered out from Hot Air switch, through which the voltage goes, that turns on the extraction (the operation of pump) and a limit switch was soldered between the cable and the switch.
Opening the housing after previously heating the seal up to 330 degrees Celsius, its safe removal and gluing to chalky paper.
Then remove silicone cables from the contacts of the „pressure indicator” and connects them using pieces of 8mm tube.
Some pictures:
Link to original thread (useful attachment) – Modyfikacja stacji PT-968