Messages

1

Parallel Port breakout boards, motherboards, and dedicated accessories / Re: PMDX-110 Machine Shuts Down At Random

« on: June 02, 2015, 10:54:53 AM »

Greetings Steve,

Thanks for the reply.

I commented out the line that reads the signal from the sensors. I can now turn on the spindle both manually and via MDI and program.

net limit match8.0.out axis.0.neg-lim-sw-in

# net limit match8.0.out axis.0.neg-lim-sw-in

Sadly, I have no hard limits and have to rely on the soft-limits.

Cheers,

David

2

Parallel Port breakout boards, motherboards, and dedicated accessories / Re: PMDX-110 Machine Shuts Down At Random

« on: May 06, 2015, 08:31:18 PM »

Greetings Bob,

Thanks for the reply.

My machine is a Smithy CNC1240 with a VFD spindle control. The spindle signal cable is connected to J2.

I am using LinuxCNC 2.5.4

Initial power up gave me a "joint 0 on limit switch error". I cleared the error and was able to power the machine on and off several times.

With the machine powered up, HOMED, and idling. I get 10.41 VDC @ J1 pins 4&6.

Machines acts the same with the Spindle Signal cable connected or not.

Checking J2 pins 4&6 I record voltage according to the SxxxxM03 command I issue. (Checked with plug attached to BOB)

S1000 2.4VDC
S2000 4.90
S3000 7.40
S4500 9.84 (Max spindle speed according to factory manual)
S5000 9.85

By the way, no spindle movement as I disconnected the signal cable from the VFD

Cheers,

Dave

3

Parallel Port breakout boards, motherboards, and dedicated accessories / PMDX-110 Machine Shuts Down At Random

« on: May 01, 2015, 11:37:34 AM »

Greetings,

I have a Smithy CNC1240 with a PMDX-110 Breakout Board.

I am using LinuxCNC 2.5.4 with the Smithy INI and HAL files.

I keep getting a "joint 0 on limit switch error" that I cannot determine the cause of.

When I issue an M03 spindle command, the error occurs and the machine stops.

I disconnected the Spindle Control cable and was able to HOME the machine, JOG the machine, and run a program with no spindle commands.

Well, that did not last long as I was able to run a program to completion and when I started it again the machine shut down with the "joint 0 on limit switch error" in the middle of the program.

I was able to run the VFD spindle manually; but, now I get a "Low voltage error" to the VFD control. This is intermittent as it seems when the machine warms up the inability to start the spindle returns.

(Update: The low voltage error is due to the CNC control cutting off power to the VFD, so naturally I would record low voltage error. I have since "hot wired" the VFD direct to the wall socket and it runs fine.)

I have some test meters available to take voltage readings, etc. with guidance.

Hopefully, someone will be able to help me sort this out.

Cheers,

Dave