Need Help for mesa 7i76e setup with linuxcnc

02 Feb 2019 09:31 - 02 Feb 2019 10:42 #125526 by yrsiddhapura
Hi all
I have setup my Mesa 7i76e and Mesa 7i84 with reference of norbert,s connection sheet. all mine axis and spindle motor works good but i am facing some problem in homing and spindle output.

For homing i have used PNP NO proxy sensors with individual input of each proxy of each axis here i am attaching my HAL file.

For Spindle i have set scale of 3000 rpm at 10v but when i try to get increase rpm its just output 7v max.
i have given following connection
PIN 1- GND(10V) from drive
PIN 2- Drive Analog in(10V)
PIN 3- 10V+ from drive
PIN 4- No Connection
PIN 5- COM from drive(Digital In)
PIN 7-COM from drive(Digital In)

File Attachment:

File Name: 7I76e_io.hal
File Size:12 KB

File Attachment:

File Name: 7I76e_io.ini
File Size:4 KB
Last edit: 02 Feb 2019 10:42 by yrsiddhapura.
02 Feb 2019 14:35 #125536 by pl7i92
the Standard VFD do support 12V supply
if you get 10V in you only get 7.6V out
The following user(s) said Thank You: yrsiddhapura
02 Feb 2019 16:06 #125547 by PCW
# Spindle
P = 0.0
I = 0.0
D = 0.0
FF0 = 1.0
FF1 = 0.0
FF2 = 0.0
BIAS = 0.0
MAX_OUTPUT = 2000.0 <<< needs to be 3000
OUTPUT_SCALE = 2000 <<< needs to be 3000
OUTPUT_MIN_LIMIT = -2000 <<< needs to be 0
OUTPUT_MAX_LIMIT = 2000 <<< needs to be 3000
The following user(s) said Thank You: yrsiddhapura
13 Feb 2019 09:26 #126330 by yrsiddhapura

actually i was on long leave and after returning from leave i had tried what you suggest i set all parameter of Max output,output scale and limits of spindles but still voltage problem is same as previous one m still getting only 7.6 or 7.8V output from digital pot. of 7i76e
13 Feb 2019 14:17 #126343 by PCW
Did you measure the +10V? (pin 3)

If you have 10V on TB4 pin 3, and 0V on TB4 pin 1
and hm2_7i76e.0.7i76.0.0.spinout = hm2_7i76e.0.7i76.0.0.maxscale
and hm2_7i76e.0.7i76.0.0.spinout_scalemax = hm2_7i76e.0.7i76.0.0.maxscale

Then the output should be 10V
If the voltage on TB4 pin 3 is not 10V the output should be the voltage on TB4 pin3

You can check these values when LinuxCNC is running with this command (ib a terminal window):

halcmd show all | grep spinout
The following user(s) said Thank You: yrsiddhapura
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