G'Day Friends
Just going through little problems on this lathe build one by one. Have solved many a problem but there is one recurring at present.
I have a slotted disk on the spindle with an opto, (recommended by Hood) in a previous thread, all is good there wiring is fine and all shielded to BOB. I'm using a Homman BOB and the little led next to the input flash's every time that slot passes through the opto without fail, even to turn by hand, 1rpm lets say it will flash on the board. Now I don't know why but when you go into Mach, on the diagnostic page it wont show the index input the way it shows up on the board? The spindle input light is actually always activated it shows the rpm but erratically, Now my spindle can turn right down to 30rpm, there is no chance I can get that reading in Mach, anything under 100 is unstable, I have tried the debounce settings to some very high numbers, it will then read down to 46 rpm but then at higher rpms the readings play up, and I have read its best to keep the debounce as low as possible.
I have read also to turn off spindle relays, this is unacceptable as I will loose my M3/M4 command to the Homman DC03 Digispeed which is working correctly. I have had to add a capacitor to the E-Stop and Limit switch inputs to stop noise setting them off and also to the 0-10v control to the VFD which gives me a very stable motor speed controller.
Question
Firstly when the led on the BOB registers the slot passing the pto, should it not show up on the inputs on the Mach screen on every pass not just every now and then?
Would adding more slots to the spindle disk help?
Is this a noise problem ?
Or is a config problem?
I realize this has being posted before but there solutions in prior threads have not worked in my case.
Thanks
Katoh