Centroid Community CNC Support Forum

dmbgo wrote: ↑Thu Oct 15, 2020 7:00 pm

martyscncgarage wrote: ↑Thu Oct 15, 2020 9:44 am Finish setting up your machine. Read the lathe operators manual on setting up tools. Always F8 Graph the part before you run it, set your feedrate over ride way down when you first run a part, perhaps use single block mode on the first part ( you have to press cycle start for each line of code)

Is this your first CNC lathe and first time operating one?

Marty, whilst this was my first CNC machine (back in 2001ish) it is not my only CNC machine. I used Mach3 and steppers initially, then upgraded to servos. I don't remember any issues with that original iteration, but it was all a long time ago and it became just another tool in the shed. I almost always used the wizards in M3, so I didn't really need to worry about machine co-ordinates vs part co-ordinates etc. I would just face the part to find Z0, take a small pass on the diameter, measure it and set my X axis accordingly. The Gcode generated by the M3 wizards was fairly simple, I think.
As I said (and you confirmed) I will finish setting up the limits, to prevent a possible repeat of the previous issue and look at the manual as you suggest.

martyscncgarage wrote: ↑Fri Oct 16, 2020 9:18 am

dmbgo wrote: ↑Thu Oct 15, 2020 7:00 pm

martyscncgarage wrote: ↑Thu Oct 15, 2020 9:44 am Finish setting up your machine. Read the lathe operators manual on setting up tools. Always F8 Graph the part before you run it, set your feedrate over ride way down when you first run a part, perhaps use single block mode on the first part ( you have to press cycle start for each line of code)

Is this your first CNC lathe and first time operating one?

Marty, whilst this was my first CNC machine (back in 2001ish) it is not my only CNC machine. I used Mach3 and steppers initially, then upgraded to servos. I don't remember any issues with that original iteration, but it was all a long time ago and it became just another tool in the shed. I almost always used the wizards in M3, so I didn't really need to worry about machine co-ordinates vs part co-ordinates etc. I would just face the part to find Z0, take a small pass on the diameter, measure it and set my X axis accordingly. The Gcode generated by the M3 wizards was fairly simple, I think.
As I said (and you confirmed) I will finish setting up the limits, to prevent a possible repeat of the previous issue and look at the manual as you suggest.

Sounds to me like you did your setup correctly for ONE tool. Face the Z, set zero, turn the x and take a measurement and enter the value.
I assume both X and Z are calibrated correctly?
Always best at least to slow the feed rate way down, press the space bar (Feed hold) as the tool approaches the work and look at the DRO's for a reality check. Do the values reflect the distance to the part? If so, press cycle start and continue, if not, recheck your part setup.

Marty

tblough wrote: ↑Fri Oct 16, 2020 3:22 pm Another good thing to do would be to start the program from the run menu (F4) and select F5/Block to start the program in single block mode. Once stated, if you are in the graph screen, press F8 to toggle to the g-code display. Look at the next line of code to be executed. Try to figure out in your mind what it is going to do, turn the feedrate knob down and then press cycle start. Slowly increase the feedrate and see if the machine is doing what you expected. Repeat for the next block, and the next, and the next until you reach the program end.

You can also do the above using the blue "Single Block" button on the VCP.

cncsnw wrote: ↑Fri Oct 23, 2020 11:37 pm "G99 F250" !?

You appear to be asking it to feed at 250mm per revolution of the spindle. Unless your spindle is turning at a crawl, that isn't going to work.