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Thank you for your help. Yesterday the router was working for three hours without any problem.

I am getting ready to embark on converting a very nice jones and shiply grinder that I recently aquired for a steal $400 USD, to linux cnc. Now the place where I could use some help from the gurus off mathmatics here. 

I want to be able to use it to grind camshafts, and crankshafts, but I think eccentric turning hal components can probably be tweaked for crankshafts. I am curious how I would 

1. generate g code for the camshaft but I suppose I could use a 2d tool paths with a end mill to generate tool tip positions, around the Z axis with x & y coordinates, the only issue is the grinder will only have z and X like a lathe. 

2. design considerations during the retrofit fit. I am thinking a servo for the z axis to control position along z in a rotary C axis fashion for grinding camshafts as indexing will be important. 

I have 3 good yaskawa AC servos packs and servos out of a hurco I tore down for parts, balls screws and mechanical tidbits for days, the hardpart is trying to figure out how to grind the camshaft lobes.  

open to suggestions if anyone has done anything similar before. 

I finally am able to get back after this, what a yr so far.

Unfortunately I guess the short answer is no, there is not an easy way to see what pins the widgets create. I should try to add it to the docs I guess.

Qtdragon use the widget pins but also makes quite a few of it's own pins in the handler file.

A increments HAL pin would be a good pin to add to qtdragon.

Chris

After more searching about Output_Scale, I have set it to 10 since it is a +-10v system. I also changed my ANALOG_MIN_LIMIT to be OUTPUT_MIN_LIMIT = -10 & same for max limit now it is OUTPUT_MAX_LIMIT = 10.

I will give these changes a shot in the morning.

Thanks.

Thank you for the confirmation and explanations. I have now corrected my velocity to match the rapid speed this machine is supposed to achieve.
In my case the rapid ipm is 944 so inch per sec would be 15.733 ips = 944 / 60
For acceleration I will try with it at 5 times the velocity to start with. 5 x 15.733 ips = 78.6667 ips which becomes 1.3111 ips^2 = 78.6667 / 60 

The encoders are reading in the proper direction. Measurements with a dial indicator match up with the DRO when moving the axis by hand.

I need your help because I'm completely lost when it comes to programming my macro for automatic tool length.
I'm aware that there are several solutions for setting my tool length, but I'm going round in circles.

I have an ATC spindle and a tool setter that is fixed and doesn't move.
i use AXIS and i wouldn't use probe panel

I would like to do my macro with the solution where in my tool table the Z offset data is the exact tool length (tool + ISO20).

the set-up procedure would be :

1 - I touch my martyr plate / set 0  / and I trigger my tool setter
 conclusion: i know the height of my tool setter

2 - I touch my  spindle without tool to trigger my tool setter
 conclusion: I know the machine coordinate of my Z axis for a contact between the spindle and my tool setter

procedure for a job :

1- I choose any tool (which has been calculated with the tool setter) by activating tool compensation T3 M6 G43

2-touch my workpiece and touch off = 0

3-start program

question :

what would be my equation to calculate the tool length.?G10 L1 P#<_tool> Z.........

i know, i think is very easy but my brain is block with that ...

 

Those are the correct output pins
 The MAX_VELOCITY and MAX_ACCEL
Are the physical maximum velocitys (in inches per second on inch machines)
and maximum acceleration in IPS^2 (typically 5 or 10 x the IPS value)

Note that on a first setup you may have the feedback reversed so you get a runaway
if the encoders are reading in the proper direction and scaled properly you can reverse the feedback by
changing the sign of OUTPUT_SCALE

 

in the interim, you can uninstall linuxcnc and reinstall using the lockdown deb version which does not prduce the error message, use the deb download links at the bottom of the page here:

linuxcnc.org/downloads/

or follow the newly updated probe basic docs page here for installation instructions on the deb:

kcjengr.github.io/probe_basic/

select develop or stable per your requirement, both tested and work on the 2.9.3 lockdown deb of linuxcnc!

Thanks for bringing this up, the powers that be are aware and are investigating the issue!

Chris

Hi all,
I was trying to follow tommylight's guide on servo tuning, but once I hook up the +-10v the motor jumps 0.010 on enable. Checking with a multimeter I am able to see 10v appear when I enable the machine. The measured pins are 3 & 4 on TB3 of a 7i97T. The manual shows 3 as GND and 4 as AOUT0.
      Are these pins the ones I should be useing for +-10v?
I have attached my hal and ini files. I would not be supprised if the problem is in my ini file. 
I am unsure of how to determine what values to use for MAX_VELOCITY, MAX_ACCELERATION, and OUTPUT_SCALE. I have tried different combinations of values without any luck. I have tried reading the docs and reading through all the forum posts I could find on those subjects.
     Could improper values for these or other variables cause the behavior I am seeing?
Thank you for your time.

Thanks for the quick response, I am always surprised at how quick you are.
Unfourtunatly I had to leave the shop and go home. In the morning I will see how well I can figure out how to get a man mesaflash to see what I have.

No worries, we do need correct info to be able to give any help, 7i76 and 7i76E are the same thing but NOT the exact same thing.
Mesa can do step/dir and analog at the same time and so can LinuxCNC, so that is easy, just use mesaflash to check what firmware is already in the 7i76E, then we can decide if a flash is needed.
see in a terminal
man mesaflash
for how to use it.

7i76E is connected to the computer through ethernet, the 7i77 connects to the 7i76e with a ribbon cable and the 7i64 connects to the 7i77 with a modified ethernet cable.
The boards have 5v and 24v field power.
It has been a while since I wired and had time to do the cards but I remember that I did flash one for some reason or another. Does it need different flashing for step direction than for analog?
And sorry again, as I said it has been a while since I had time to get into this again and don't remember where to type readhmid

This worked:  Installing ethercat repositories - Page 2 - LinuxCNC

I was able to edit the file by using:Then it all worked.  Thanks for the notes.