cmcgrath5035

Nothing immediately obvious.

It might help others commenting if you make you full config file available for review. Suggest you use this method:

https://www.synthetos.com/topics/forum-information-sharing-readme/

If you feel like hacking, maybe try this:
Edit your Gcode file so that the sequence of lines with G0/G1 commands that do work (all 6 lines) are followed by 6 lines with G0/G2 commands.
You could also try G3 commands rather than G2, in case the issue is G2 unique.
Maybe some sort of initialization of Axis issue?

nikky
You are adding on to a VERY OLD thread (last post over 2 years ago).
I suggest you start a new thread, as all previous items in this thread are very out of date and may/may not be accurate in the current tinyG environment, FW 438.02.

http://synthetos.github.io/

And be a bit more precise about what you are wanting to do; will your Gcode sender use USB for serial communications, or hardwire to internal serial port?

Have you reviewed all the Wiki Items on Gcode communications with tinyG?

As a general statement, the tinyG bootloader should be protected from improper serial commands, but sometimes bad things can happen when you make hardwire connections.

Do you have any insights about how can I find the corresponding pins?

Sorry, Wiki reference is the boundary of my experience here. I don’t use Gshield, had never heard of RAMPS FD before this (looks to be a complete 6 axis driver?).
I assume you are aware of Vcc differences between Uno and Due.
It would seem likely that, given the complexity of the RAMPS FD shield, additional setup/configuration of the RAMPS FD might be necessary?

Good luck, let us know how you make out.

Alhadar: One thing I have experienced in experimenting with my Spindle (similar, not identical to yours) and controller is that occasionally the spindle does not start spinning when I ramp up the speed POT – its needs a spin from me to get going. Not sure why. The top of my spindle is a cooling fan, I assume yous is as well; spin that.
Goes without saying: be careful, it could ramp to high speed quickly.

Sorry, I am having a difficult time understanding your problem description.
I am unfamiliar with the program ArtCAM.

Suggestion #1 – Disconnect your spindle driver from tinyG. Move the Spindle driver jumper pin to the position to select the on-board POT.
Connect your Power supply to the spindle driver. Turn on the power supply, adjust the POT 0n-board the driver from low (CCW) to high(CW)setting. Does the spindle respond at all?

If not, it is not a tinyG problem, not sure how we can help you.

Guys
After looking at Alhadar’s spindle package and a bit of research, I realized I needed one too; my dewalt 660; beefy, fast, is too much RPM for engarving lettering on acrylic (it is overheating the material).
So I purchased a spindle and a controller like Alhadar’s from Amazon.

Comes with Zero documentation.
I found this from a different seller , which is consistent with the Inventables link I posted a couple days ago.

As we suspected, the PWM input is connected to an Orient 817C opto-isolator, PWM+ to the anode thru a 600 ohm resistor, PWM- to cathode.
Note that the jumper must be properly positioned to use the PWM input rather than the POT.

It will be a week or so before I can actually test it with my tinyG. I’ll be trying first the direct connection – similar to what the Inventables link displays.

Chris
We were typing at the same time. 🙂
Thanks for the Eagle suggestion