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  • Users: MRSSPOCK
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  1. MRSSPOCK

    crimp identification

    Would anybody know what this crimp type is called, and where they can be bought. Thanks
  2. MRSSPOCK

    23 degree pressure angle on stub teeth ???

    I have a gear of unknown definition in my hand. I measure base pitch and find it is 6.12mm. I am confident in this measurement. I know this 6.12 value is a fundamental dimension of the rack cutter, for example, and is fixed regardless of profile shift etc. When I do some calculations, it appears...
  3. MRSSPOCK

    BRAKE BOOSTER KNEE ARRIVES TOO SOON

    My brake booster seems to pass all the usual checks as regards holding vacuum with no leaks, and a pressed pedal progressing further downwards, when the engine is started, however, it seems to reach the"knee" point on the input versus output forces graph too soon. I can only assume it is an...
  4. MRSSPOCK

    AC CONDENSER FAN full speed continually 199% DUTY CYCLE

    Could anyone please explain to me what a 199% duty cycle means on an AC condenser fan, (as reported by live data from the scan tool). The fan on this FORD FOCUS is running non stop, at what appears to be full speed. (I am assuming there is no speed control on such fans, but rather are on or off...
  5. MRSSPOCK

    watch maker question

    I realise I am probably not posting this question in the proper area, and probably not even on the proper forum, but here goes anyway. Does anybody have any idea what is the function of the part I have marked with a red "X" in the image below. The shaft which it passes has a scallop machined out...
  6. MRSSPOCK

    TV LED RIBBON CABLE TOO LONG

    I am struggling to find a replacement cable for an LED TV. The cable which links the T-Con board to the screen. My cable is 80mm long. I can find a cable which is 100mm, (20mm longer than what I need). My question is, if I buy this cable and put two 180° folds in it to create a joggle, to...
  7. MRSSPOCK

    TWELVE DIODES INSTEAD OF SIX

    Does anybody have any idea why my refurbished Denso alternator has twelve diodes, whereas the original had six? It works fine, but I'm mystified how a three phase alternator even uses twelve diodes. Does anyone have a schematic or an explanation. Thanks
  8. MRSSPOCK

    VFD MOTOR CONTROL WITH FWD REV AND LIMIT SWITCHES

    I am considering using a VFD to operate a motor, which is linked by chains and sprockets to an elevating platform. The platform would need an upper and lower limit switch to prevent it crashing. I wish for the operator control panel to have just 3 buttons, UP, DOWN and STOP. I presumed this was...
  9. MRSSPOCK

    WARPED CYLINDER HEAD QUESTION

    I have never heard anyone discuss the implications of skimming a cylinder head, and often wondered why. Suppose I have a twin cam cylinder head, and the camshaft axes are on the split plane where the rocker cover is fitted, and the rocker cover forms half of the cam journals. Let's say when this...
  10. MRSSPOCK

    circuit explanation

    Could someone please give me an idea what is going on with this board design. The board is from an old coffee machine. The optical sensor is used to detect the presence of a linear ram. I am just trying to understand the circuit, and figure out what that 3 pin black component is. Can anyone give...
  11. MRSSPOCK

    SQUARE WAVE HIGH AMPLITUDE FUNCTION PULSE GENERATOR VINTAGE - BRAND NEW HV FLUKE PROBE SWAP?? BREXIT

    Hi. I'm trying to get hold of a function generator or even just a square wave generator which can output up to about 50V. Something old and cheap is fine if it works. I have seen a Tektronix 106 (in the usa), which would do the job, but does anyone know of any other device which would be capable...
  12. MRSSPOCK

    transformer phase shift - how to measure with oscilloscope

    I know this might seem like a schoolboy level question, but I'm afraid I'm stuck. If I have an unknown transformer and what to determine if there is a phase shift, how can I do it with my two channel scope, considering both channels use the common ground, and so by connecting two channels I am...
  13. MRSSPOCK

    voltage suppression diode orientation

    Let's say, like me, you have wired a voltage suppression diode in parallel with a solenoid coil, but you forgot to label the identical wires before the solenoid got buried under other components, not to mention the adhesive heat shrink. Is there a way to determine the orientation of the diode...
  14. MRSSPOCK

    HVAC High pressure switch

    I've searched high and low, pun intended, to find out, at what actual pressure, an HVAC pressure switch might kick in, (or I supposeI should say kick out, since it is normally closed). Or let me put it another way. If a high pressure switch is continually interupting the circuit, how can one...
  15. MRSSPOCK

    BNC oscilloscope reverse polarity adapter ?

    I have searched for a few hours to no avail, for an adapter to connect to my oscilloscope probe, to reverse its polarity. I have found some which look reasonably close to what I want,(but not quite, at extortionate prices). I only use a scope for simple pretty basic functions. I bought a...
  16. MRSSPOCK

    starter lock out relay mercedes a140 W-168 - what is its purpose - bypass possible

    I am working at a friends Mercedes A140 W-168. I think the fault, (which causes intermittent starting problems), might be something to do with the starter lock out relay. I haven't got it removed yet for inspection, so I am not totally sure just yet. I'm curious does anyone know the...
  17. MRSSPOCK

    Sparkplug Clamp Pickup Sensor Circuit Fluke RPM80

    For anyone interested . . . I looked for a while and tried different suggestions regarding how to create a sparkplug clamp / pickup which would produce a half decent and consistent signal. I didn't have much success so I just took the plunge and bought a Fluke RPM80. The output is excellent...
  18. MRSSPOCK

    LIMIT ADC INPUT WITH ZENER DIODE ??

    Hi. I have a project involving a load cell. The actual load to be measured is about 20kg, however in order to provide some mechanical protection (i.e. to prevent the load cell getting loaded past its elastic limit, due to operator error), I decided to install a 50kg load cell instead. The...
  19. MRSSPOCK

    VFD drive blown with no load ??

    I'm totally new to VFD's I just bought one to try to learn more and it looks like I've blown it before even starting! I wanted to learn how to navigate the menus etc before actually linking it up to my three phase washing machine motor. I connected it to my single phase supply and after...
  20. MRSSPOCK

    WASHING MACHINE THREE PHASE ??

    Please forgive my ignorance, but am I right to presume that any washing machine motor with a bunch of 5 wires attached, like shown below, is a three phase motor? I've seen folk on Youtube control washing machine motors speed with an inverter, so I am just curious to know, is it as simple as...

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