Parker December 2017 Discontinuations

Obsolescence of GT Stepper Drives and GV L3 servo drives


Discontinuation Date: December 2017

Parker Hannifin, EM&D is discontinuing the sale of all Gemini Stepper drives and the L3 version of the Gemini Servo effective immediately due to component availability. This notice impacts all Gemini Stepper variants but only the low-power Gemini Servo drives listed below. Other Gemini Servo models are not impacted by this notice.

The following part numbers will be discontinued:
Steppers:
  • GT-L5
  • GT-L5-NK
  • GT-L8
  • GT-L8-NK
  • GT6-L5
  • GT6-L5-NK
  • GT6-L8
  • GT6-L8-NK
  • GT6K-L5
  • GT6K-L5-NK
  • GT6K-L8
  • GT6K-L8-NK
Servo:
  • GV-L3E
  • GV6-L3E
  • GV6K-L3E
  • GV-L3E-NK
  • GV6-L3E-NK
  • GV6K-L3E-NK
  • GV-L3R
  • GV6-L3R
  • GV6K-L3R
  • GV-L3R-NK
  • GV6-L3R-NK
  • GV6K-L3R-NK
All custom products based on the above products will also be discontinued, for example:
CP*GT6-L5-xxxxx

Availability
The products listed above are no longer available for sale. Repairs will be supported for three to five years. Typically, Parker will offer customers a last time buy period before obsoleting a product. However, order activity for the GT steppers exceeded normal forecasts and depleted remaining inventory before a last-time buy notice could be distributed. We apologize for any inconvenience this may cause.

Suggested Replacements - Gemini Stepper
A direct replacement for the Gemini Stepper drives is not available. The Gemini was a premium digital stepper drive with high-end features. In many cases, the GT was applied in place of servos where the lower-cost stepper motors created an effective system price. The continued reduction of servo pricing has reduced the need for a product like the Gemini stepper. The E-AC and ZETA drives are alternatives for many applications that are using the drive-only GT versions. Both E-AC and ZETA will run the same type of 2-phase stepper motors used with the Gemini. See chart below for comparisons between the products.

Product

GT-L5

GT-L8

E-AC

ZETA4

ZETA8

Current, Amps (pk)

5

8

3.5

4

8

Input Voltage

95-132VAC

Command Input

 

Step & Direction

Yes

Yes

Yes

Yes

Yes

CW/CCW

Yes

Yes

no

Yes

Yes

±10 VDC, 12-bit

yes

yes

no

no

no

Encoder Tracking

Yes

Yes

No

no

no

I/O

 

Connector

50-pin hi-density

25-pin D-Sub

Enable (or shutdown) Input

Yes

Yes

Yes

Yes

Yes

Reset Input

Yes

Yes

Yes

Yes

Yes

Fault Output

Yes

Yes

Yes

Yes

Yes

Brake output

Yes

Yes

Yes

Yes

Yes

Drive to Controller Cables

 

to ACR9000

71-022316-x

71-021113-xx

to 6K

71-019863-xx

71-016137-xx

Features

 

 

Electronic Viscosity

Yes

Yes

No

Yes

Yes

Active Damping

Yes

Yes

No

Yes

yes

Encoderless Stall Detect

Yes

Yes

no

no

No

Maximum Step Resolution

128,000

50,800

50,800

Dimensions, mm

 

Height

203

203

136

225

248

Width

79

95

48

51

70

Depth

153

153

110

152

180