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Author Topic: Getting FT_INVALID_HANDLE. Error message  (Read 6092 times)

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Getting FT_INVALID_HANDLE. Error message
« on: March 07, 2014, 10:23:24 AM »
My cnc router was working well, when I started getting error messages. Smoothstepper is used.

Error message is:

Error returned from USB function FT_Write
Error: FTDI USB driver error

ERROR= FT_INVALID_HANDLE

Bytes requested 64
Bytes written 26

Any suggestions for fixing this?

Red led remains lit on smooth stepper

Thanks,
Jim

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Re: Getting FT_INVALID_HANDLE. Error message
« Reply #1 on: March 08, 2014, 06:13:29 AM »
do you have a pokeys connected too. i have problems with the combination of ESS and PokeysUSB
Re: Getting FT_INVALID_HANDLE. Error message
« Reply #2 on: May 29, 2016, 11:28:42 AM »
I get the same error message , it started when I switched to a usb controller board. don't know why it does it but I wish it would stop.
Re: Getting FT_INVALID_HANDLE. Error message
« Reply #3 on: June 19, 2016, 05:50:25 AM »
You have a ground loop issue on the 5v supply to the USS, have a look at the info on the warp9 website and forum, plus ask on the forum as it is better supported by the manufacturer
Rob

Albert Einstein ― “If you can't explain it to a six year old, you don't understand it yourself.”