Sinclair QL printer (Seikosha) cable

A place to discuss general QL issues.
User avatar
Outsoft
Super Gold Card
Posts: 587
Joined: Sat Apr 19, 2014 1:30 pm
Location: Italy
Contact:

Sinclair QL printer (Seikosha) cable

Postby Outsoft » Wed Nov 15, 2017 8:20 pm

Hi Guys.

I would like to find a QL SERIAL to PRINTER cable for the Sinclair "Seikosha" Printer.

Someone have a scheme for reproduce it?

s-l1600.jpg


Thanks and best regards.


User avatar
Pr0f
Bent Pin Expansion Port
Posts: 96
Joined: Thu Oct 12, 2017 9:54 am

Re: Sinclair QL printer (Seikosha) cable

Postby Pr0f » Thu Nov 16, 2017 8:52 am

There are some manuals for this on Dilwyn's site :

http://www.dilwyn.me.uk/docs/manuals/in ... #qlprinter

Seems the Serial interface connections are :


RS-232C, 25-pin D male.


Pin configuration of the input connector.

PIN SIGNAL EXPLANATION
1 FG Frame Ground
3 RXD Input data
7 SG Signal Ground
20 DTR BUSY/READY state fo the printer
ON (+3 ~ +25V) … Ready to receive data
OFF (-3 ~ -25V) … Busy


so from QL - Ser1, you want these connections:

1 >>>> 1/7 on printer DB25

3 >>>> 3 on printer DB25

4 >>>> 20 on printer DB25

leave other connectors unconnected. (For serial 2 use 1, 2 and 5 instead of 1, 3 and 4)


User avatar
Derek_Stewart
Aurora
Posts: 816
Joined: Mon Dec 20, 2010 11:40 am
Location: Runcorn, Cheshire, UK

Re: Sinclair QL printer (Seikosha) cable

Postby Derek_Stewart » Thu Nov 16, 2017 9:22 am

Outsoft wrote:Hi Guys.

I would like to find a QL SERIAL to PRINTER cable for the Sinclair "Seikosha" Printer.

Someone have a scheme for reproduce it?

Thanks and best regards.


Hi,

I think I have a standard QL SER to DB25 cable.

I will check and PM you later.


Regards,

Derek
User avatar
Outsoft
Super Gold Card
Posts: 587
Joined: Sat Apr 19, 2014 1:30 pm
Location: Italy
Contact:

Re: Sinclair QL printer (Seikosha) cable

Postby Outsoft » Thu Nov 16, 2017 7:58 pm

Pr0f wrote:There are some manuals for this on Dilwyn's site :

http://www.dilwyn.me.uk/docs/manuals/in ... #qlprinter

Seems the Serial interface connections are :


RS-232C, 25-pin D male.


Pin configuration of the input connector.

PIN SIGNAL EXPLANATION
1 FG Frame Ground
3 RXD Input data
7 SG Signal Ground
20 DTR BUSY/READY state fo the printer
ON (+3 ~ +25V) … Ready to receive data
OFF (-3 ~ -25V) … Busy


so from QL - Ser1, you want these connections:

1 >>>> 1/7 on printer DB25

3 >>>> 3 on printer DB25

4 >>>> 20 on printer DB25

leave other connectors unconnected. (For serial 2 use 1, 2 and 5 instead of 1, 3 and 4)


Thanks for the scheme.

I can replicate now.

Very very kindly regards!!!


User avatar
Outsoft
Super Gold Card
Posts: 587
Joined: Sat Apr 19, 2014 1:30 pm
Location: Italy
Contact:

Re: Sinclair QL printer (Seikosha) cable

Postby Outsoft » Thu Nov 16, 2017 8:10 pm

Pr0f wrote:There are some manuals for this on Dilwyn's site :

http://www.dilwyn.me.uk/docs/manuals/in ... #qlprinter

Seems the Serial interface connections are :


RS-232C, 25-pin D male.


Pin configuration of the input connector.

PIN SIGNAL EXPLANATION
1 FG Frame Ground
3 RXD Input data
7 SG Signal Ground
20 DTR BUSY/READY state fo the printer
ON (+3 ~ +25V) … Ready to receive data
OFF (-3 ~ -25V) … Busy


so from QL - Ser1, you want these connections:

1 >>>> 1/7 on printer DB25

3 >>>> 3 on printer DB25

4 >>>> 20 on printer DB25

leave other connectors unconnected. (For serial 2 use 1, 2 and 5 instead of 1, 3 and 4)


Need to use it on my German QL so DB9 to DB25 (with the same connections of the BT SER1 port on QL side).


User avatar
Outsoft
Super Gold Card
Posts: 587
Joined: Sat Apr 19, 2014 1:30 pm
Location: Italy
Contact:

Re: Sinclair QL printer (Seikosha) cable

Postby Outsoft » Sat Nov 18, 2017 5:35 pm

Pr0f wrote:There are some manuals for this on Dilwyn's site :

http://www.dilwyn.me.uk/docs/manuals/in ... #qlprinter

Seems the Serial interface connections are :


RS-232C, 25-pin D male.


Pin configuration of the input connector.

PIN SIGNAL EXPLANATION
1 FG Frame Ground
3 RXD Input data
7 SG Signal Ground
20 DTR BUSY/READY state fo the printer
ON (+3 ~ +25V) … Ready to receive data
OFF (-3 ~ -25V) … Busy


so from QL - Ser1, you want these connections:

1 >>>> 1/7 on printer DB25

3 >>>> 3 on printer DB25

4 >>>> 20 on printer DB25

leave other connectors unconnected. (For serial 2 use 1, 2 and 5 instead of 1, 3 and 4)


Sorry for SER1 is:


so from QL - Ser1, you want these connections:

1 >>>> 1/7 on printer DB25

3 >>>> 3 on printer DB25

4 >>>> 20 on printer DB25


1 >>>> 1 or 1 >>> 7 on Printer Serial DB25 port?

I need a scheme for produce a DB9 to DB25 ser1 cable for the printer.

Thanks a lot ;)


User avatar
tofro
QL Wafer Drive
Posts: 1203
Joined: Sun Feb 13, 2011 10:53 pm
Location: SW Germany

Re: Sinclair QL printer (Seikosha) cable

Postby tofro » Sat Nov 18, 2017 5:40 pm

Simon,

on the DB-25 end, 1 is "Shield" (which is normally GND) and 7 is "signal ground" (which is normally GND as well). For non-exotic applications like QL-to-printer, that is the same. So, feed 7 of the 9-pin to both 1 and 7 on the DB-25.

On second thought, shielding (the mesh around the wires) should only be connected on one end of the cable - So, if you connect the shield to the printer end (1), leave it open on the QL end and vice versa.

Tobias


User avatar
Outsoft
Super Gold Card
Posts: 587
Joined: Sat Apr 19, 2014 1:30 pm
Location: Italy
Contact:

Re: Sinclair QL printer (Seikosha) cable

Postby Outsoft » Sat Nov 18, 2017 9:38 pm

tofro wrote:Simon,

on the DB-25 end, 1 is "Shield" (which is normally GND) and 7 is "signal ground" (which is normally GND as well). For non-exotic applications like QL-to-printer, that is the same. So, feed 7 of the 9-pin to both 1 and 7 on the DB-25.

On second thought, shielding (the mesh around the wires) should only be connected on one end of the cable - So, if you connect the shield to the printer end (1), leave it open on the QL end and vice versa.

Tobias


Thanks ;)



Return to “General QL Chat”

Who is online

Users browsing this forum: No registered users and 2 guests