I have been searching for Larry’s 1.0C spindle/laser firmware and am confused as there are a couple different 1.0c downloads and do not know which one to use. Could someone post the link.
Thanks
Thanks again
If what you said earlier is true, and you got your Xcontroller last fall, you probably fall outside the potential suspect USB cable issue window.
I was about to type in an expanded explanation of how PicsSender manages the grbl parameters, and thought that it might be some benefit beyond the thread I was in at the moment, so I decided to place the response here and link to it from the other thread.
For this thread I’m using screenshots from the 2.7.4 version of PicSender.
Here is the startup window, after I have homed my machine:
To move to the window that manages the grbl parameters press the gold “GRBL” button at the top right of the current window. That brings up the following window:
Notice that at the top middle of this window there is a selection for spindle or laser. At this time the selected device is “Laser”. This version of PicSender supports two multi-mode versions of grbl, my 1.0c version and the official 1.1f version.
PicSender works with two files on your disk drive that contain the settings to be used with the current PicSender session. They are “Laser.txt” and “Spindle.txt”. These are the default files that PicSender uses. You may also specify a different file to store/retrieve the settings from by using the “Save” and “Open” buttons (middle of the screen).
For grbl parameters that are the same for laser and spindle, you must set the parameter that you want to change in both files in order for the change to take effect for both the spindle and laser parameter sets.
There is a third location that stores the grbl parameters and that is in the Arduino/X-controller hardware. This is the version of the parameters that grbl works with to execute your G-code. It is the user’s responsibility to make sure that the correct parameter set is loaded into grbl before running a job on the machine.
However, once set up properly, PicSender will help you by placing the appropriate parameters set into grbl (based on the selection of “Laser” or "Spindle) when you start a PicSender session and when you change the device selection by pressing the “Spindle” or “Laser” button.
In order to display and/or change one or more grbl parameters, you press the green “GRBL Settings” button at the top center of the window. The display will change to something like this:
The panel on the right now contains the grbl parameters as they are in the Arduino/X-controller hardware and the left panel is the “edit” panel where you can change one or more settings to new values.
Make the changes that you want to make in the left panel and when you have them all done you will press the light green “Send” button to update the parameters in grbl (Arduino/X-controller hardware).
If you want to make the changes “persistent” you also press the violet “Save” button to save the new parameters in the Spindle.txt or Laser.txt files (you can also save to a different file name if you don’t want to change the default files, but you would need to use the “Open” button to retrieve those settings as PicSender loads either Spindle.txt or Laser.txt into grbl [Arduino/X-controller] when the program starts).
Remember, if you change a grbl parameter that affects both spindle and laser you must save a new default file for both the spindle device (Spindle.txt) and the laser device (Laser.txt) if you want the change to be persistent for both devices.
Press the gold “Return” button to return to the main screen.
It sounds very complicated, but once you have your machine tuned and the parameter files setup properly, it’s merely a quick one button press to change between spindle and laser.
Thanks go to Jeff and John for all their hard work to make this easy for the user.
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Thank you very much Larry for adding these PicSender instructions.
The tool tips are already there, but the Save & Send buttons are not selectable until the grbl settings are displayed in the Edit Savings panel. Select the GRBL Settings button and the tool tips will then display when you hover the mouse cursor over them.
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Got it. Thanks.
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Sorry, but I’m only allowed to give this just the 1 Like. 
And thank you very much for this Larry. Having someone besides me explain things in different words is a big help. I get hung up viewing something like this from the inside looking out, instead of like a user outside looking in. 
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hi I used picsender v2.2.4 for aloge time ,now i format my pc so i wnt to install this program but when i go to picsender website there is another version ,when i install it i can not register , the icon do not work
i purchase this program and i have registered code
You need to connect to the com port before the registration button will be active to select it.
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Bring up PicSender 2.7.4 using my 1.0c grbl (haven’t tested this with any other version).
$H button
Select spindle
$30=255, $31=0
Do CMD S10
$G button
Note spindle speed (mine is 10)
M03 button
$G
Note spindle speed 12000
Shouldn’t it still be 10?
PicSender is setup for turning a Spindle on/off with a relay (S12000) when selecting the M03/M05 buttons on the Spindle Mode jogging screen. Or, you can vary the speed by using the Do Cmd and turn it off with a M05 executed in the Do Cmd. Or, click the M03/M05 buttons quickly to turn it off.
It will vary the speed with S values when running a gcode file, even if the Pause/Resume is used. It remembers what the last S value was in the gcode file when Resuming.
You can switch to Laser Mode and set a PWM value for the S+ & S- jog buttons to speed up or down the Spindle speed also. The S+/- jog buttons sends a M03 Sxx, so there is no need to execute a M03 in the Do Cmd, It uses the set S jogging value when selecting the M03 button after the S+ button sets that value and the M05 button will turn it back off again.
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Steps to fix USB Ports not Working in Windows 10
- Click Start, and then click Run. …
- Type devmgmt.msc, and then click OK. …
- In Device Manager, click your computer so that it is highlighted.
- Click Action, and then click Scan for hardware changes.
- Check the USB device to see whether it is working.
Source: Top 6 Methods to Fix USB\DEVICE_DESCRIPTOR_FAILURE Error in Windows 10