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As a test, can you try setting the maximum velocity to
say 1/2 of the current values to see if that stops the step
loss?
 

A 1A power supply is fine. Normal current draw
is in the 300 to 500 mA range depending on
external connections. A High current supply
is more of a risk if you make a wiring mistake.
 

-same issues happen on 1/4 and 1/8 - I can hear the steps skipping
-not sure what you mean by your second point
-lower acceleration seems to not change anything

machine images attached

A couple other things to note:
-I'm getting the same problem when I use HSM (solidworks cam add in from autodesk, similar to fusion cam) and Cut2D from Vetric
-If I orient the long direction in the X axis or the Y axis, it seems to skip more steps moving in the positive direction (X or Y). The most positive side of the pocket will have that stepping problem between cutting layers as shown before, but the most negative side of the pocket seems to stay lined up 

I have just ordered a mesa 7i96s and was wondeing what the best way to power it is. I've read that it requires 5V but I'm not sure what the current requirements are. Additionally does it have built in over current protection, so that it will only draw the current that it requires if I was to use say a 5V / 10A switching power supply?

Gcode files:

Longways y oriented:   

Longways x oriented:   

sprintertrd wrote:

Thanks for the explanation.

Result from apt-cache policy linuxcnc,

linuxcnc:
Installed: (none)
Candidate: (none)
Version table:

Which is strange as it is a fresh install of the current 2.9.3 iso.
 

Sorry my mistake it's apt-cache policy linuxcnc-uspace

JT

I do not use it, a client does, and he is one of those "why do something simple when you can complicate it" so he uses AutoCAD to make the drawings, then imports into Inkscape and exports as gcode from it.
For the 5 axis stuff he uses something else and despite telling me a dozen times, i forgot what, sorry.

Make sure you have this line in the [HAL] section of your ini file:

I'm making a physical knob & push-button interface for Axis. I have an Arduino board that is successfully sending and receiving messages with Axis.

The next thing I want to try/test is push one of the physical buttons and then link that incoming message (that I can presently observe in HalShow) to cause the X axis to jog one increment in the positive direction. Assume I have already selected the X axis and set the jog increment, I just need to activate the "+" jog button. I searched through all the pins, signals etc in HalShow and could not find that "+ jog button", the closest thing I found was joint.0.kb-jog-active that gets activated when I click on the jog button, so not exactly what I need.

In the LinuxCNC HAL tutorial part 2, he has a bunch halui signals defined in his custom_postgui.hal file (see below). Can I simply replicate what he has done to get access to these signals or do I need to something else to expose the pins shown in the right hand column?
 

The 7I96/7I96S SSR outputs are good to a couple KHz
but the software PWM will be limited by the 1 KHz servo
thread rate. As I said either PDM or say a 20Hz PWM
frequency should be fine for a hot wire.

What program did you use for your 5 axis ? or did you have to hand write the G-code?

Thanks for the reply PCW. I highly doubt I will need a high speed pwm. I am just controlling
a resistive load. LOL. What kind of frequency can one of the outputs drive?

Hi peeps, I have the ec500 v5 and a stlink v2 I'm struggling to find any info on what pins to connect to my st link. My board has GND, SCK, SWD, PRO-B, 3V3 and BOOT.  Many thanks in advance 

As tommylight suggested, you must connect the 7I96/7I96S input common (TB3 pin 12)
for the inputs to work. The inputs are fully isolated and have no connection to the
rest of the 7I96S. If you want +5V to activate the inputs, you must connect the input
common pin to 5V GND.

I would set the 8I20 current scalemax and PID max output
to the _peak_ current rating of the motor.

Did you try raising the servo thread rate to say 4 KHz?