Flashing SD Image
In some instances, it may be necessary to restore the operating system image for a RTCNC system running on a Raspberry Pi.
To flash the SD image you will need the following:
- A micro SD card with a minimum size of 32 GB. All data on the card will be lost when the image is flashed.
- A SD card reader (external or built-in)
- The Raspberry Pi Imager software available on the Raspberry Pi website
Looking for a preflashed sd card? Check out our website:
PART 1
Remove SD card from the side of Redline HMI
Place the Micro SD card into your micro sd card reader on your PC/Laptop
- If your laptop/PC does not have a microSD reader, you can aquire one that plugs into a usb A port locally or online HERE
Part 2
Raspberry Pi Imager
Step 1: Download the Realtime OS Raspberry Pi Image from the link below:
Step 2: Download the Raspberry Pi Imager program here: program here: Pi Imager
Step 3: Install Raspberry Pi Imager to your computer.
Step 4: Remove all external drives from your computer (sd cards, usb sticks, usb printers). Then insert your SD card you pulled out of your Onefinity Controller into your computer. (some computers do not have a slot for an sd card. You can purchase an adapter very inexpensively here: SD card reader)
Step 5: Open Raspberry Pi Imager.
- For the column “Select your Raspberry PI Device” choose “Raspberry Pi 5”. Hit NEXT.
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Under ‘OS’ under Choose Operating System. Scroll down until you see 'Use Custom" and select it. A dialogue box will pop up directing you to select the image file previously downloaded in step 1.
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Select the RTCNC SD Image (.zip file) you just downloaded above.
Step 6: Under Storage, Click CHOOSE STORAGE.
Now, select the sd card you put into your computer from the Onefinity Controller. (drive your Onefinity SD card is in) on your computer (Warning, this will delete EVERYTHING from the drive you select. BE SURE it’s the Onefinity SD card and not your personal drive as you WILL LOSE all of the data. Hit NEXT.
Choose to erase all data:
Step 7: Click WRITE! PLEASE NOTE: When it gets to 99% it may hang on that step for an hour+. Please be paitent and do not cancel. It will finish.
Step 8: Ignore ALL popups (like “this drive needs to be formatted”, etc.) while etcher is running.
Step 9: After etchers progress bar fills up during ‘decompressing’, it will switch to ‘flashing’. After flashing, it will switch to ‘verifying’. Please wait patiently until all 3 of these processes finish. It’s best practice to not do anything on the computer from the moment you click ‘flash’ until the moment etcher finishes the job and says ‘success’.
Step 10: Once Imager finishes it should read, “Write Complete!” At this point, you can push FINISH and remove the SD card from your computer and reinsert it into the Onefinity controller. Remember, the wording on the sd card will face down, towards the bottom of the controller when reinstalling it from the top down.
Finish
Once complete, you can remove the card from the reader and plug it into the Raspberry Pi. The Raspberry Pi may reboot several times when first powered up. This is a normal part of the installation process.
First Boot up on controller
After you reinsert the sd card in your Redline HMI, it will boot up as normal. It is important after it first boots up to go to the configuration tab and select your machine type. Failure to do so may render your machine inoperable.












