[Vic Cutter]

Need Help Converting a Seiko robot to Step/Dir
I have a Seiko D-TRAN Cartesian Robot that was made in the late 1990’s and I’d like to convert it to use step and direction software like Mach3 software . My question is; Would Gecko servo drives work for this conversion and if so would the g100 be a good choice as a controller?

I have the original power supply and the original Servo motors. The specs on the motors are:
X Axis -Tamagawa Seiki Co. Ltd, TRE DC Servo Motor, Type TS1976N101E21, 500 watt, , Encoder 600 C/T, Serial No. AO361, Date: 1993 7, Made in Japan
Internet research has told me that these are 75V motors rated at 3.6A , instantaneous max current 18.1A, Rated speed 3,000min, ?Max speed 4,000min,encoder power source +5V ±5% 200mA Max, These encoders have 9 wires coming out of them colored: Red, Black, Blue, Black, Yellow, Black, Green, Black and black attached to cable shield and the internet motor specs say that the have Tachogenerators attached rated at 6V/1,000min


Y and Z axis motors are both: Model: DH072-200E5N01, Shinano Kenshi Co. Ltd., Made in Japan , no motor specs are shown on the motors but Internet research has told me that these are 200 watt , 75 volt , rated speed 3,000, Encoder rated voltage 24v . These motors both have built in encoders with 9 wires coming out of them colored: Red, Black, Blue, Black, Yellow, Black, Green, Black and black attached to cable shield.

All 3 motors have black and red power wires that have what looks to be a resistor and a small capacitor wired between them.

I would appreciate any comments you experienced CNCer’s have about this project.

[H.O]

Hi,
Going by your numbers those motors should work nicely with the G320 or G320X. As the motors are 75V and the Geckos max voltage is 80V you'll probably end up at a powersupply voltage of ~72V which means you may not get every last RPM out of them but you'll get fairly close.

The encoders however may be a little more problematic. The X-axis encoder should work if you power it with separate powersupply as the G320 can "only" supply 50mA of current. 9 wires from the "encoders" seems reasonable for a tacho and differential encoder.
Tacho +
Tacho -
5VDC to encoder
GND to encoder
A+, A-
B+, B-
Shield

Telling you which cables are what I'm afraid I can't help you with. You'll have to see if you can find the specs or you need to do some detective work insede the unit to possibly figure it out.

If the other encoders are 24V (and outputs 24V signals) they won't work with the G320 without some "glue" bringing the 24V signals down to 5V. It's doable but a bit of a mess, I'd sugest you replace them instead. Renco, CUI, Hengstler, USDigital etc.

As for the G100 I believe all development on the plugin has stopped and using it with Mach3 is not advisable if you don't already know it WILL do what you need. My sugestion is to either run with the LPT-port or look at Smoothstepper (which has it issues as well) or perhaps something like the KFlop from Dynomotion.

If the servo drives works but needs an analog control signal do look at the KFlop+KAnalog combination from Dynomotion. It'll allow you to run it as it is - with Mach3 or with their software.

Good luck!
/Henrik.

EDIT: Oh, I forgot - You probably want to remove that resistor/cap filter if going with the G320.