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i have grounded the vfd cable and am going to replace the crappy USB cable on the pokeys 57 if i still have a problem i am going to get a network unit.. i would like to keep the PMDX because it it

that is quite an expensive book but i just got it on ebay for $20 with shipping. the seller has two moer copies in case anyone else wants one. just search for the title on ebay and see who has it buy

It sounds like nothing might be wrong now. The big mistake was thinking that the VFD cable shield was grounded whereas it never was. It is now grounded at both ends and since it has no signal wires in

Spenser, My Pokeys Mach-4 system had very similar problems when using USB. My Pokeys also has an ethernet port and after switching to ethernet I have had zero problems. Bertho Sent: Saturday,

Thank you Keith for mentioning my favourite book on the subject. As far as I'm concerned there is no better reference on how to deal with noise on anything from PC boards all the way up to entire

Hi Spencer Have you tried a proper USB isolator in your USB connection? These range in price from a few dollars for a hobby grade device to around $100 for a proper industrial spec isolator such as

wow, what a treatise, much appreciated. i will ground the motor end of the VFD power cable as well as the VFD end which is now grounded. done the chassis of the router was not connected to the mains

Almost all PCs with a three prong plug have the DC signal ground connected internally to the AC mains safety ground. This makes it important to consider the potential for ground loops. USB signal

i always connect shields at one end. i have known this for many years. hopefully my problem was that in an attempt to connect the shield at one end i actually connected it at neither end thinking the

yes, i know i was talking about harnesses that are already made and taking them apart and twisting the wires. however i am almost certain that the problem is not in the signal wires to the motors

a common grounding/shielding mistake often made... you should only connect your wire shield at one end! examples: stepper motor being grounded to a metal chassis...ground at the motor, not at the

I did not mean to twist your existing wires. I was referring to when making harnesses using individual wires and then twisting the pair. Bertho Sent: Friday, March 27, 2020 23:43 To:

it doesn't fail at the same point every time. there are actually two points in the code where it fails. one is definitely after the spindle starts on a new run. the program begins with a spindle on

i have read a lot online about usb noise and it seems to be a problem in lots of places. unfortunate that it is so ubiquitous but so fucked up, sort of like bluetooth. does anyone think that the

i think it is all plugged into one outlet. will double check. not sure how i can twist wires at this point stuff is pretty mush in place but will look at the possibility. Best regards, Spencer

Spencer First, your comment about the A stopping at the same value each time. I seem to remember from a few years back that there was a bit of a discussion about the A having a move limit in Mach

A quick addition to John’s good comments: Make sure that all AC line cords are plugged into one wall outlet through a power strip. Using two different wall outlets can add a lot of unrelated

I had a lot of noise problems with my Mach 4 and a Pokeys controller using the USB interface. My wiring was carefully done. I removed the USB cable and switched to ethernet and I have not had a

one more thing. i never had this problem until i switched to the Pokeys from the parallel port. so i am pretty sure that the noise is getting into the Pokeys through the USB cable. so should i put a

i just checked and i do not have a shield on the USB cable. all my grounds are star config with one possible exception that might explain the problem??? i just checked and found that the shield for