Need Help for mesa 7i76e setup with linuxcnc

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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
TB4
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 6- FWD
PIN 7-COM from drive(Digital In)
PIN 8-REV

File Attachment:

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

File Attachment:

File Name: 7I76e_io.ini
File Size:4 KB
Attachments:
Last edit: 02 Feb 2019 10:42 by yrsiddhapura.

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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

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02 Feb 2019 16:06 #125547 by PCW
#********************
# Spindle
#********************
[SPINDLE_9]
P = 0.0
I = 0.0
D = 0.0
FF0 = 1.0
FF1 = 0.0
FF2 = 0.0
BIAS = 0.0
DEADBAND = 0.0
MAX_OUTPUT = 2000.0 <<< needs to be 3000
ENCODER_SCALE = 1024.0
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

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13 Feb 2019 09:26 #126330 by yrsiddhapura
Hi PCW

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

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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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23 Feb 2019 07:52 #126990 by yrsiddhapura
Dear PCW
as following your instructions i had measure the +10V on pin3 of tb4 its shows 10.69V and still output on pin 2 is 7.69 to 7.99V(vary) here i m posting screen shots of command(You suggested) executed and HAL and INI files

And m also not able to set analogue in to spindle override i have programmed it in 'oprator.hal" (at very bottom)file could you help on this too actually it my very first project with linuxcnc.

regards,
yagnesh

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23 Feb 2019 10:06 #126994 by yrsiddhapura
issue of spindle override has been solve now i am stuck at only single issue for spindle output voltage i had tried with analogue pot with spindle drive and it output 10.7V which is also input voltages

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23 Feb 2019 14:46 #127005 by PCW
If you have ~10V on TB4.3, 0V on TB4.1 and LinuxCNC is commanding full scale, sounds like the 7I76E Analog output circuit has failed or been damaged somehow.

Did you measure 10.69 at TB4.3 when the output was ~7V?

I have seen cases where the VFD potentiometer power supply will not
supply the ~5 mA that the 7I76E analog circuit requires at full scale

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23 Feb 2019 19:14 #127014 by yrsiddhapura
Yes it was 10.69v when output is ~7v. Is there any way to find out that is circuite is damaged or not and if it is then any chance to fix it ?

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23 Feb 2019 19:25 #127015 by yrsiddhapura
Does grounding or earthing can effect it ? Or any kinda wiring issue ? Can effect it ?

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