mdx20.md

Roland Modela MDX-20 CNC

• Flow control
• |DB9 | DB25|
• Parts

Flow control

The Roland modela USB to DB9 cable uses DTR/DSR flow control. But I might have to rewire.

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|DB9 | DB25|

1 8 2 3 3 14 5 7 6 6 7 4 8 5 9 22

The startech cable does RTS/CTS flow control

http://sgcdn.startech.com/005329/media/sets/ICUSB232_Manual/ICUSB232.pdf

Pin Assignment 1 CD 2 RXD 3 TXD 4 DTR 5 GND 6 DSR 7 RTS 8 CTS 9 RI

and when I see MDX-20 pinout, it's

1: FG 2: TXD 3: RXD 4: RTS 5: CTS 6: DSR 7: SG 20: DTR

http://support.rolanddga.com/docs/Documents/departments/Technical%20Services/Manuals%20and%20Guides/MDX-20-15_USE_ENGLISH_R5.pdf (page 69)

For my understanding, shouldn't the pins with same name have to be connected together?

according to the pinouts

RS232 Modela
1 CD --------- No idea, 20? 2 RXD --------- 3 RXD 3 TXD --------- 2 TXD 4 DTR --------- 20 DTR 5 GND -------- 7 SG ?(Ground?) 6 DSR -------- 6 DSR 7 RTS -------- 4 RTS 8 CTS -------- 5 CTS 9 RI

When I see Nadya's instruction(http://wiki.infosyncratic.nl/FabLab)

it's

1, 8 <-----> 20 2 <-----> 2 3 <-----> 3 4 <-----> 5, 8 5 <-----> 7 6 <-----> 4 7 <-----> 6

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DB9	DB25 Grey	DB25 Nadya
1	8	20
2	3	2
3	14	3
4	20	5,8
5	7	7
6	6	4
7	4	6
8	5	20
9	22	none

Parts

• DRIVE GEAR ASSY MDX-15 7488424000 40,45€
• DRIVE GEAR ASSY 2 MDX-15 7488424100 45,18€