Help connecting servos to breakout board Mach3

[EddyCurrent]

Anything here ? https://forum.linuxcnc.org/38-genera...wa-servomotors

https://en.industryarena.com/forum/s....php?t=157229&

Have you searched for a generic answer to using servos with Mach3 ?

[m_c]

You really need to know how the drives are set before you can test them.
However a quick look at those pinouts, and if you apply all the required power inputs, activating the RUN pin should at least get the servo to lock, however that depends on the related settings having not been changed from the default where activating the pin enables the servo.

[Agathon]

You really need to know how the drives are set before you can test them.
However a quick look at those pinouts, and if you apply all the required power inputs, activating the RUN pin should at least get the servo to lock, however that depends on the related settings having not been changed from the default where activating the pin enables the servo.

Thanks, I see what you mean, there are so many parameters that could have been changed. Having looked through the manual a little further I think I need to short pin 34 and 35 before the drive will do anything at all.

It's critical that I get the software interface to work - I think that there's something funny going on with the USB-RS232 converter I have, the Yaskawa software seems to think it's a RS-422 port.

I just need to keep buggering-on buggering-on until I get there.

[Boyan Silyavski]

I think that there's something funny going on with the USB-RS232 converter I have, the Yaskawa software seems to think it's a RS-422 port.

I just need to keep buggering-on buggering-on until I get there.

you need to keep on eliminating reasons and i can tell you straight away that i would never use USB-RS232 converter for connecting to servos, or anything. . You need a normal. PC with a normal PCI port and an adapter there. Or even better, a PC with a com port that you could control from bios.


Standard RS-232C RS-422A

specifications
Communications
method
Asynchronous (ASYNC)
Baud rate 2,400 bps
Start bits 1 bit
Data 8 bits
Parity None
Stop bits 1 bit

That above is from your servo drive manual. If baud rate is not set at Com port same same, communication will NOT ever happen



And most of all check that manual https://www.fa.omron.com.cn/data_pdf...8d-u.pdf?id=68 for the proper connection to the drives from the PC side . Check your cabling if is right.


So in other words from page 1-7 seems you need Null Modem Cable https://www.decisivetactics.com/supp...h-serial-cable

[Agathon]

you need to keep on eliminating reasons and i can tell you straight away that i would never use USB-RS232 converter for connecting to servos, or anything. . You need a normal. PC with a normal PCI port and an adapter there. Or even better, a PC with a com port that you could control from bios.


Standard RS-232C RS-422A

specifications
Communications
method
Asynchronous (ASYNC)
Baud rate 2,400 bps
Start bits 1 bit
Data 8 bits
Parity None
Stop bits 1 bit

That above is from your servo drive manual. If baud rate is not set at Com port same same, communication will NOT ever happen



And most of all check that manual https://www.fa.omron.com.cn/data_pdf...8d-u.pdf?id=68 for the proper connection to the drives from the PC side . Check your cabling if is right.


So in other words from page 1-7 seems you need Null Modem Cable https://www.decisivetactics.com/supp...h-serial-cable

Many thanks Boyan - that's really helpful. I'll check all the above. I do have a PC with a RS-232 port and have tried connecting with that, but I didn't check any of the settings. I'll check the cable too.

[Clive S]

I do have a PC with a RS-232 port and have tried connecting with that, but I didn't check any of the settings. I'll check the cable too.

you will have to make sure the baud rate is the same at both ends also start and stop bits are correct, the handshaking might be xon/xoff (ie software handshaking). You might also have to swap pins 2 and 3 over at one end this depends if the Pc is setup as DTE or DCE. one good thing about the com port is that it is hard to break

[Agathon]

you will have to make sure the baud rate is the same at both ends also start and stop bits are correct, the handshaking might be xon/xoff (ie software handshaking). You might also have to swap pins 2 and 3 over at one end this depends if the Pc is setup as DTE or DCE. one good thing about the com port is that it is hard to break

Thanks Clive, I'll take a look at all the things Boyan mentioned. I'll check the PC DTE or DCE settings - I'll buy a cable that I can alter the connections on.

[Agathon]

you need to keep on eliminating reasons and i can tell you straight away that i would never use USB-RS232 converter for connecting to servos, or anything. . You need a normal. PC with a normal PCI port and an adapter there. Or even better, a PC with a com port that you could control from bios.


Standard RS-232C RS-422A

specifications
Communications
method
Asynchronous (ASYNC)
Baud rate 2,400 bps
Start bits 1 bit
Data 8 bits
Parity None
Stop bits 1 bit

That above is from your servo drive manual. If baud rate is not set at Com port same same, communication will NOT ever happen



And most of all check that manual https://www.fa.omron.com.cn/data_pdf...8d-u.pdf?id=68 for the proper connection to the drives from the PC side . Check your cabling if is right.


So in other words from page 1-7 seems you need Null Modem Cable https://www.decisivetactics.com/supp...h-serial-cable

Looking at that drawing and the info you've sent on null modem cables, it's not a straight RS232 cross-over as it's computer pin 2 to driver pin 2 and computer 3 to driver 4. I'll have to make a cable.

Will post and let you know how I get on - thanks again.

[Agathon]

you need to keep on eliminating reasons and i can tell you straight away that i would never use USB-RS232 converter for connecting to servos, or anything. . You need a normal. PC with a normal PCI port and an adapter there. Or even better, a PC with a com port that you could control from bios.


Standard RS-232C RS-422A

specifications
Communications
method
Asynchronous (ASYNC)
Baud rate 2,400 bps
Start bits 1 bit
Data 8 bits
Parity None
Stop bits 1 bit

That above is from your servo drive manual. If baud rate is not set at Com port same same, communication will NOT ever happen



And most of all check that manual https://www.fa.omron.com.cn/data_pdf...8d-u.pdf?id=68 for the proper connection to the drives from the PC side . Check your cabling if is right.


So in other words from page 1-7 seems you need Null Modem Cable https://www.decisivetactics.com/supp...h-serial-cable

OK, got the software to talk to the driver thanks to your diagram Boyan - many thanks. USB-RS232 working well - software thinks it's 422, but I'm not splitting hairs.

Do you have a source for the manual? - it's not the same as the two I already have and may contain more detail. The manuals I have don't show pin numbers for the CN3 port for instance.

[Boyan Silyavski]

OK, got the software to talk to the driver thanks to your diagram Boyan - many thanks. USB-RS232 working well - software thinks it's 422, but I'm not splitting hairs.

Do you have a source for the manual? - it's not the same as the two I already have and may contain more detail. The manuals I have don't show pin numbers for the CN3 port for instance.

In your manual when you read it carefully here and there is mentioned about some sub manuals, like the one i linked to. Or just do a careful straight google search for the thing you have not clear. i have 2 manuals for my Samsung servos, and they are slightly different.