Retrofitting a 1986 Maho MH400E

In your ini_config.txt you have to set that parameter.
John

Hi John
Thank you for the answer.
Bob

Assuming you will be wiring in the rotary tables ROD encoder into the fourth axis encoder input of the MESA 7i77 connector TB4 pins 1-8, and configuring the GUI to display the fourth axis. Not sure how happy the GUI and LinuxCNC is going to be about diplaying a manual axis, especially, whether it will error out if you hit the GUI's C AXIS jog button, although there is no motion control connection?

I am pretty crap at the HAL/INI config stuff but let me throw out my ideas, and maybe Andy or one of the other HAL Jedi's can correct this...

In the INI:
[DISPLAY]
GEOMETRY = xyzc

[TRAJ]
AXES = 4
COORDINATES = X Y Z C

[AXIS_3]
TYPE = ROTARY
HOME = 0
ENCODER_SCALE = 1000 ; or whatever it is.
OUTPUT_SCALE = 10 ; You'll have to work all these values out for your machine.
OUTPUT_MIN_LIMIT = -10
OUTPUT_MAX_LIMIT = 10
MIN_LIMIT = -1
MAX_LIMIT = 400
HOME_OFFSET = 0
HOME_USE_INDEX = YES
HOME_SEQUENCE = 2
; So after LINUXCNC homes the linear axis's it'll sit and wait till you home the C Axis.

In the HAL:
loadrt hm2_pci config=" num_encoders=4 num_pwmgens=0 num_stepgens=0 sserial_port_0=300xxx"

#*******************
# AXIS C
#*******************
# ---Encoder feedback signals/setup---

setp hm2_5i25.0.encoder.03.counter-mode 0
setp hm2_5i25.0.encoder.03.filter 1
setp hm2_5i25.0.encoder.03.index-invert 0
setp hm2_5i25.0.encoder.03.index-mask 0
setp hm2_5i25.0.encoder.03.index-mask-invert 1
setp hm2_5i25.0.encoder.03.scale [AXIS_3]ENCODER_SCALE

net c-pos-fb <= hm2_5i25.0.encoder.03.position
net c-vel-fb <= hm2_5i25.0.encoder.03.velocity
net c-pos-fb => axis.0.motor-pos-fb
net c-index-enable axis.3.index-enable <=> hm2_5i25.0.encoder.03.index-enable
net c-pos-rawcounts <= hm2_5i25.0.encoder.03.rawcounts

# ---setup home / limit switch signals---

net home-c => axis.3.home-sw-in
net c-neg-limit => axis.3.neg-lim-sw-in
net c-pos-limit => axis.3.pos-lim-sw-in

Hi Mark
A Big Thank You !
Being able to display the manually positioned rotary table will be extremely useful. I can't think of any other MAHO accessories where this is needed , but feel people will be making some neat stuff that can benefit.
Maybe the boat building kiwi will find this useful .
Cheers
Bob

Hi there,

did some little adjustment to the table.
It was almost perfect just sitting in the fitting-keys.
The cleaning of the contact surfuces really did it.
cloud.monschan.de/index.php/s/xzb9BMs4T2wRaKi
cloud.monschan.de/index.php/s/yH5qHWQ7cepm8Ap

First fit:



The original plastic nut literally turned to dust.
Don't know if it is correct, but I made the thread M38x1.5

Hi Bob,
Don't get too excited, I doubt my draft HAL/INI will work without editing and correcting,

Hi Hanno,
Nice progress. I get bad gateway errors on the two links you sent though.

I was machining some aluminium spacers for a friend today. Haven't cleaned the chips out of the try for a while, and the mesh got clogged so the coolant overflowed onto the floor. What a mess.
Mark