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| awemawson:
The pump itself is totally immersed in the oil reservoir, so it won't lose it's prime. There are various joints, again internal to the oil reservoir, that connect the pump to the switch and the outside world. A leak there is possible as it wouldn't show externally. . . . I'll have to pull it apart and have a look-see over the next few days |
| AdeV:
I once half dismantled my entire Bridgeport Interact no less than 3 times before discovering that the automatic oiler had run out.... In my defence, the fault was "24v DC missing" - a complete red herring! |
| awemawson:
Ade I remember you having issues I initialized the machine this morning (no issues) then deliberately disconnected the oil output from the Vogel. It took an amazing time to put on it’s red light to say that there was a fault. Probably about the same time as the dwell between pumping. Good oil flow, and when connected good oil pressure. So I conclude that it’s probably the pressure switch or more likely the electronics. I’ll pull the orange controller out and go over a few soldered joints when I get a spare hour or so. Last time it seemed to clear when I reseated an ic but quite possibly I had actually disturbed something else! |
| awemawson:
I realised last night, that with a new puppy being collected on Saturday after which my time won't be my own, I had a small 'window of opportunity' today and tomorrow to pull the Vogel IG-38 controller and have a close look at it. Photos taken of connections for reference, listed in my lab day book, wires tagged with 'flag ty-wraps' and I could then pull the unit out of the pump leaving the oily bits behind. Case opens easily with the usual plastic ramp clips allowing me to pull the electronics from the box. Last time I didn't split the electronics - it consists of two PCBs separated by a third in a sandwich construction with soldered connections on headers holding it together. One main PCB has eight header pins and the other six, so I opted to unsolder the 'six pin side'. Using my powered solder sucker and some flux the plated through holes seemed quite clean but rather than risk pulling the plated holes though the board I ran some low melting point solder into the joints - this stays fluid long enough just to pull the header pins out all together. A bit of a clean up with the sucker and flux followed by a squirt of brake cleaner and a scrub with a toothbrush and it's good for re-assembly when the time comes. There is one socketed IC, three transistors, a bridge rectifier, five diodes, a handful of resistors and polyester capacitors and two electrolytic capacitors and two relays all powered by a tiny mains transformer. Also a rotary switch to set repetition time. I will replace the electrolytic capacitors, try and open the relay cases and clean the contacts, then re-flow every joint on all three PCBs and also the terminal block. |
| awemawson:
So checking my stock for the two electrolytics showed that although I could fit something 'that would do' my stock was probably as old (if not older!) than the components fitted so I've placed an order for 47 & 220 uF 63 volt aluminium axial capacitors with RS that should be here tomorrow. Meanwhile I took the covers off the relays to clean the contacts. Relay 1, is just a single pole change over - no drama, contacts cleaned with a slip of paper and switch cleaner / lubricant. Relay 2 (two pole change over) was a different matter. The armature was stuck in the operated position with no clearance to the magnet :scratch: At first I thought that the contacts must have welded shut, then I thought that the armature had been deliberately bent, but no, eventually I realised that there were two tiny paxolin 'bridges' - a flat bit of paxolin with a peg sticking out at both ends - deliberately put in the mechanism to force it into the operated position. Obviously a modification to make this module suitable for this particular lubrication pump. Simpler to leave the relay out and link the contacts but Vogel obviously thought differently! Then I went over EVERY soldered joint re-flowing it with a bit of flux so hopefully any lurking dry joint will have been cured, and equally hopefully I haven't introduced any other faults! . . . so now just waiting for those capacitors . . I hope that they arrive early . . 'double change over' in cottages tomorrow so times not entirely my own! (Capacitor photos to make sure I put the replacements in the right way round!) |
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