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General Mach Discussion / Re: Manual control of CNC router after Mach3 code is finished?
« on: June 04, 2008, 06:51:14 PM »
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Hood
Hood
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1. Spindle driver fault signal from the AMC servo amp.
I would like to have a separate input for this signal which would estop the system but show a spindle drive fault.
2. Spindle power supply over current circuit breakerAs above, would have to link into the fault relays and seperate signal to Mach to light LED via the NC on the relay
I would like to have a separate input for this signal which would estop the system but show a spindle power supply fault.
3. Spindle mechanical brake
On my ahha machines I have simply added a line to the M03, M04, and M05 m-code map file to enable and disable the brake. I'm not sure how to implement this in mach3. I would also like to have an m-function for the brake also.
I will control the electro mechanical magnetic brake with a 120 VAC solid state relay controlling a 24vdc power supply.
As above, macros.
4. Oiler
Answer to #3 will solve this one as well.
5. Axis drive power supplyWill have to read through this again to make sure I followed but from first glance I think the e-stop should always need a re-ref as it is open loop so no way for the control to know if steps have been lost. The system you seem to be describing on the AHHA sounds more like the feed hold to me, ie if it ramps to a halt it is not an E-Stop as it has taken time to decelerate properly. An emergency stop is exactly that, a last resort and as such you want immediate halt to your motors not a ramped stop.
Currently the Axis drive power supply is controlled by at 120 VAC solid state relay driven by the charge pump circuit on the PMDX board.
This works but I don't like to remove power from the stepper drives every time there is a e-stop condition as the drives will loose position. On an ahha system, pushing estop caused all axis to ramp to a stop leaving the drives powered on. Returning from a e-stop condition didn't require resetting home and part zero.
I would like charge pump #1 to control the pmdx boards which would be disabled when in estop. The spindle power supply SSR is also connected to this charge pump.
I would like to use the second charge pump output to control the axis drive power supply and stay powered up during estop. I know about the check box to make this work this way but it seems that it only applies to the first charge pump. I would use a stand alone charge pump circuit for this.
In the beginning it was suggested I just hook the pc power supply 12 volts to the axis power supply SSR. This worked but as the pc powers up there are some glitches on the axis drives.
Anyone have any other ideas?
6. Auxiliary AC Outlet
Answer to #3 will solve this one as well.
7. Resolution (steps per inch)
The machine is currently configured to run at 50,800 steps per inch. The drives are 10 microstep G201 and I don't have the G901 boards installed.
The machine runs very smoothly but the resolution is quite un useable and this hurts the performance with the step limitations of mach3. I am running the kernel speed at 60K per machmotion.com's recommendation.
I am trying to decide whether I should just buy the G901 boards and reduce the drives resolution or just buy the smooth stepper board. Any opinions?