Centroid Community CNC Support Forum

Can someone point me to the location (parameter?) of the speed with which the machine goes to the home position? Mine is set to 10in/min and it takes all day long to get there. Also, in Intercon or Setup is there a way to define a specific tool change location? Currently the Z is going home and it takes forever to get there. I can't find reference to these in the CNC12 Manual.

Thanks,

Axis configuration, change your slow jog rate.

the CNCM.HOM or CNCT.HOM file are created by the Wizard. From the Mill Operator's manual:

13.23 M91 - Move to Minus Home
M91 moves to the minus home switch of the axis specified at the slow jog rate for that axis. After the
minus home switch is tripped, the axis reverses until the home switch clears, and stops when it detects the
index pulse. When reversing until the home switch clears, the clear state must be reached within 0.25
inches for a linear axis and 45 degrees for a rotary axis or an error occurs.
If the control configuration "Machine home at pwrup" field is set to "Ref Mark-HS" and the "Home -"
field in the Motor Parameter menu is set to 0 (zero) to specify reference mark homing, the behavior of this
command is to start moving and then stop when the index pulse is detected.
Example:
M91/X ; moves the X-axis to the minus home switch.
G92 X-10 ; sets X minus home switch at -10
13.24 M92 - Move to Plus Home

M92 moves to the plus home switch of the axis specified at the slow jog rate for that axis. After the plus
home switch is tripped, the axis reverses until the home switch clears, and stops when it detects the index
pulse. When reversing until the home switch clears, the clear state must be reached within 0.25 inches for a
linear axis and 45 degrees for a rotary axis or an error occurs.
If the control configuration "Machine home at pwrup" field is set to "Ref Mark-HS" and the "Home +"
field in the Motor Parameter menu is set to 0 (zero) to specify reference mark homing, the behavior of this
command is to start moving and then stop when the index pulse is detected.



Get in the habit of PARKING the machine at the end of the day. It will send it very close to the home position before you shut down the machine, that way, the next time you start the machine, it will home quickly.

Alternately, when you start up, DO NOT HOME first, rapid the axis close to the home position and THEN hit Cycle start to home.

You can also create custom homing macros info here:
https://www.centroidcnc.com/centroid_di ... amming.pdf

Marty

Thanks for the attention Marty. If I change the slow jog rate to a bit faster for homing, will that also speed up the X1 position jog rate on my MPG?

caskscob wrote: ↑Fri Aug 20, 2021 11:35 am Thanks for the attention Marty. If I change the slow jog rate to a bit faster for homing, will that also speed up the X1 position jog rate on my MPG?

Good question but I don't believe so

Probe rates are now separate from jogging rates.

First, the jog speeds can be found on page 273 of the manual.

15.2 Machine Configuration
Pressing F2 - Machine from the configuration screen will display the machine configuration screen. The
machine configuration screen provides you with a method of changing machine dependent data.
If you wish to change the Jog or Motor parameters, press F1 - Jog or F2 - Motor to select the Jog or
Motor screens. Use the arrow keys to move the cursor and select the desired field. Type the new value and
press ENTER or press the SPACE bar to toggle. When you are done editing, press F10 - Save to save
any changes you have made. If you wish to discard your changes and restore the previous values, press
ESC. Pressing ESC again will return you to the previous screen (Configuration).
15.2.1 F1–Jog

Secondly, If you have an MPG then you get make a macro to Fast Job back to X0Y0Z0.

CNCMaryland wrote: ↑Fri Aug 20, 2021 4:15 pm Secondly, If you have an MPG then you get make a macro to Fast Job back to X0Y0Z0.

Can't move to X0Y0Z0 until after the machine is homed.

CNCMaryland wrote: ↑Fri Aug 20, 2021 4:15 pm Secondly, If you have an MPG then you get make a macro to Fast Job back to X0Y0Z0.

The machine doesn’t know where X0Y0Z0 is until AFTER you home it.

I do as Marty pointed out, BEFORE I press cycle start to home the machine I jog it manually close to my home switches and then press cycle start. I park my router at the rear, center of the table so it’s out of the way. I also have my wizard settings so the software powers up in fast jog mode and not slow for the manual jogging. Just one less button to push.

tblough wrote: ↑Fri Aug 20, 2021 4:54 pm

CNCMaryland wrote: ↑Fri Aug 20, 2021 4:15 pm Secondly, If you have an MPG then you get make a macro to Fast Job back to X0Y0Z0.

Can't move to X0Y0Z0 until after the machine is homed.

Oh sorry, I thought the question was about jog speed.

His question was about jog speed when homing. I took your comment about the macro to mean you could write one to jog to X0Y0Z0 faster for him before he homes the machine. Of course you can do this afterwards. He can either manually fast jog the machine close to the home switches then let it home itself or edit the slow jog rate in the wizard.