7i76 spindle out wiring
The 7i76 manual says to wire it up with the 3 wires ( +10, 0 and centre) to act as a pot replacement but the existing wiring on the Denford only uses two wires (0v and centre) is the sprint configured different for a Denford or does the denford controller generate the 10v internally?
Thought it was going to a simple retrofit but its turning into a major rewire.
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- tommylight
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If there is no 10V output on the drive, you will have to provide one and wire the output of the power supply to the +10V and GND on the 7i76 and the GND and viper on Mesa to the 0V and viper on the drive. Also i've read several times that a 12V adapter will do just fine at any current rating. The heavy ones with a big transformer are not recommended as they do output 16V with no load.
You should wait a bit till PCW can reply as he is the ultimate expert on this.
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Wired as per mesa docs with 3 wires for pot replacement.
With no load there is 10v on the Sprint400, but when its connected to the Mesa card it drops to 2.7v. I can get the spindle spinning but it runs when it should be stopped and then just gets faster as I start the spindle from LCNC.
Any ideas? I note that the Sprint 400 is a non isolated board but the isolated output from the mesa should be ok.
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And do double check the wiring, that does not seem right, it should work properly as per the above wiring explanation.
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Without the run signal, it should not spin.
motion.spindle-forward ===> output (run contact on VFD)
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Hal and ini files ?
And do double check the wiring, that does not seem right, it should work properly as per the above wiring explanation.
The machine is at the workshop so will have to check tomorrow. thanks
When the spindle is not suppose to be running, you need to remove the run signal. Close it when you get an M3,
Without the run signal, it should not spin.
motion.spindle-forward ===> output (run contact on VFD)
I did think that but I'm sure I should be able to have the spindle running slowly. at the moment it seems to be a minimum of 1000rpm
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cannot supply the ~5 mA that the 7I76 analog out circuitry needs.
Note the _isolated_ make sure the supply is isolated (no PC supplies etc)
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