I would say that has a centre tap, that is a tapping on the track at 50% of the travel.
Plenty about but the connections may be orientated differently.
I've just had a rummage in the garage and it appears I threw all my old joysticks out about a year ago and guess which pot I don't have new in my old parts boxes.....
I still have a few contacts in the game, but that machines getting old now
Do you have a wiring diagram/service manual for it???
yes we have the service manual
its the slew thats messing us about
think the card is not very well.... you can set the low end volts 2.55 with the joystick just off the stop, but you cant set the top end 5.5v?
does not move with the volts at 2.55
have got round this by setting the low end at about 4volts... it moves now, but obviously only 1 speed... so it is usable
it was faster one way than the other, but discovered the pot wasnt exactly at centre at rest... the pot is on a clamp arrangement so tweaked this
strangely if you are slewing, and call another function eg boom in/out it speeds up a bit?
fairly certain its the pcb at fault, and thats potted, and i dont want to go digging around in it, cos at the moment the machine is useable
It's generally those small square pots on the pcb at fault, you have min/max voltage pots and a ramp pot, zero the ramp pot then set min, then max and then ramp.
Also check the slew valve stems where the mag coils sit, sometimes corrosion/rust builds up between the coil/stem and causes the stem to be crushed slightly stopping the valve opening smoothly.
Various hydraulic places can obtain parts for electronic type parts:- IPS