Need Help!- No rapid on Z Axis with G0

[machintek]

If the Z whines, then it is stalled.
A stall occurs when the motor falls behind the energized fields so it is attracted to the behind it in stead of the one in front of it, then due to frequency and mass it just sits there and oscillates, hence the whine.
The pulses have a ramp up to rapid and a ramp down. If the magnets are weak in the motor, or the energy is not there (leaky capacitor, bad bridge), low voltage, part of wave missing, or there is some drag on the axis (thick oil, no oil, belt dragging), or a flaky component somewhere, that particular axis will stall.
If a motor has magnets with weakened fields, I could turn down the rapid rate on the RCK/ZCK and buy some time.
So you are stalling. Now you have to figure out why.
Maybe block gives the power supply a chance to recharge.

George

[btcoutermash]

So I beleive sometime ago when we were trying to ensure the machine was well tuned up, the pots on the RCK board were turned. I fould in the maintance manual where you can set those pots, but I am not sure of one of the connections. I figured we could just set these pots to spec and see if that fixes the error. In M-154, on Pg4-59, section 4.2.4.2.3, line one says "Connect voltmeter to TP3 ICI9-2 (D16-2), scope to IC19-10 (D16-10)".
I know where TP3 is, but where is "IC19-2 or (D16-2)???

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[machintek]

I have a cheat sheet on tuning the RCK and ZCK using a meter or a scope. If I remember, P3 is the rapid. Running the X in rapid, you can turn the pot and listen to the frequency change. Slow it down.
Do not know when I will be at my office but when there I will try and scan that and attach it here.

George

[btcoutermash]

George,
That would be so greatly appreciated!! I am about at wits end and really would like to get this machine up and running...