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ge:ge_1000 [2014/09/24 05:28] – mcmasterge:ge_1000 [Unknown date] (current) – removed - external edit (Unknown date) 127.0.0.1
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-{{:mcmaster:ge:ge_1000:overview.jpg?300}} 
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-**WARNING WARNING WARNING** 
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-X-ray machines can be dangerous if not properly used 
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-**WARNING WARNING WARNING** 
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-GE 1000 (Gendex 1000) dental x-ray head.  My machine was made 1977, Gendex split in 1983 
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-I was told this head was from a GX 700 but I think its actually a GX 1000.  This also matches the case markings better.  I think the terms "GE 1000" and "GX 1000" are interchangable 
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-Why: got Gendex USB x-ray sensor on surplus market and trying to make a PCB x-ray inspection machine 
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-====== Markings ====== 
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-{{:mcmaster:ge:ge_1000:dataplate.jpg?300}} 
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-dataplate 
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-<code> 
-GENERAL ELECTRIC COMPANY 
-MILWAUKEE WISCONSIN   MADE IN USA 
-------------------------- 
-GE 1000 HOUSING MODEL 46 137660610 
-MINIMUM FILTRATION 20 MM ALUMINUM 
-EQUIVILENT AT 100 KVP 
-SERIAL 175092 
-------------------------- 
-E1 0 TUBE INSERT MODEL 46 12539461 FOCUS 10 
-MINIMUM FILTRATION 0.5 MM ALUMINUM 
-EQUIVILENT AT 100 KVP 
-SERIAL 42453 
-------------------------- 
-COMPLIES WITH DHEW RADIATION PERFORMANCE 
-STANDARDS, 21CFR SUBCHAPTER J 
-TUBE HOUSING ASSEMBLY MANUFACTURERED 
-September 1977 
-------------------------- 
-X RAY EQUIPMENT CLASSIFIED BY UNDERWRITERS 
-LABRATORIES INC WITH RESPECT TO FIRE 
-SHOCK AND MECHANICAL HAZARDS ONLY 
-SEE UL CLASSIFIED PRODUCT INDEX 3101 
-SA 
-</code> 
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-====== External connections ====== 
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-{{:mcmaster:ge:ge_1000:conn_ai_ma_pi.jpg?300}} 
-{{:mcmaster:ge:ge_1000:conn_x_g_xc.jpg?300}} 
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-With best guess at pinout 
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-Side 
-    * A1 
-      * HV primary1 
-    * MA 
-      * Current sense 
-      * Probably very high ohm resistor 
-    * P1 
-      * HV primary2 
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-Side 
-    * X 
-      * Fillament primary1 
-    * G 
-      * Ground 
-    * XC 
-      * Fillament primary2 
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-Control box is rated peak of 115 V * 18 A = 2070 W 
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-Resistances 
-  * AI-PI: 0.4 ohm 
-    * High voltage 
-    * "The HV transformer has a ratio of approx 1:700, so you get 1 kV peak on the tube per volt RMS on the input. The effective output impedance of the transformer is around 500 k, leading to a drop in the HV of 500 V per mA of tube current." [4hv] 
-  * X-XC: 19.2 ohm 
-    * Fillament 
-    * "X-Xc is the filament transformer, don't power it from 115V, normal filament running voltage is usually 50 - 70 V RMS, depending on the tube type inside the head." [4hv] 
-    * 35% on my small variac (maybe around 40V) was enough to sature my 150,000 CPM rated MyGeiger2 (SBM-20) 
-      * ie no clicks but actually in very high radiation 
-      * hard to measure actual radiation because CPM has long averaging period 
-  * G-case: 0.0 ohm 
-    * Ground 
-  * All others: inf 
-  * MA: current monitoring 
-    * Tie to ground if unused 
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-====== Tube ====== 
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-The control boxes indicate its a 100 kV, 10 mA (or 90 kV 15 mA) tube.  I get the impression this is unusually powerful.  I tend to remember someone said this unit is too powerful to use in modern dental offices but should be fine for PCB inspection 
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-====== 46-158800G2 controller ====== 
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-Master control unit.  Provides correct voltages to up to three tubeheads 
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-From [eBay 291057383064] 
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-{{:ebay:toolsplusmore83:ge:46-158800g2:0.jpg?300|}} 
-{{:ebay:toolsplusmore83:ge:46-158800g2:1.jpg?300|}} 
-{{:ebay:toolsplusmore83:ge:46-158800g2:2.jpg?300|}} 
-{{:ebay:toolsplusmore83:ge:46-158800g2:3.jpg?300|}} 
-{{:ebay:toolsplusmore83:ge:46-158800g2:4.jpg?300|}} 
-{{:ebay:toolsplusmore83:ge:46-158800g2:5.jpg?300|}} 
-{{:ebay:toolsplusmore83:ge:46-158800g2:6.jpg?300|}} 
-{{:ebay:toolsplusmore83:ge:46-158800g2:7.jpg?300|}} 
-{{:ebay:toolsplusmore83:ge:46-158800g2:8.jpg?300|}} 
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-====== 46-181123G1 remote control ====== 
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-{{:mcmaster:ge:ge_1000:control1.jpg?300}} 
-{{:mcmaster:ge:ge_1000:control2.jpg?300}} 
-{{:mcmaster:ge:ge_1000:control3.jpg?300}} 
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-Provides remote control, came with my tubehead.  The main controller was still in use for a bit longer so wasn't able to take it but might be able to get it in a few months 
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-15 mA and 10 mA scale.  Someone mentioned that 
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-46-18109B meter board 
-  * Makes display read 100kVp @ 118 VAC 
- 
- 
-====== References ====== 
- 
-    * 4hv thread that helped me get it going: http://4hv.org/e107_plugins/forum/forum_viewtopic.php?166075.last  
-    * [[http://serviceimaging.com/gendex/download/miscellaneous/Spareparts/ETB_Gendex_20050505_01_en.pdf|http://serviceimaging.com/gendex/download/miscellaneous/Spareparts/ETB_Gendex_20050505_01_en.pdf]] 
-      * Very useful document with equipment pictures, descriptions, and part numbers from the original system 
-    *  [[http://christophergranz.com/?p=39|http://christophergranz.com/?p=39]] 
-      * GX-1000 tubehead teardown 
-      * Has a number of useful comments 
-    *  [[https://www.youtube.com/watch?v=RsU74R_vdnM|https://www.youtube.com/watch?v=RsU74R_vdnM]] 
-      * Video of someone cutting open what I think is the same model 
-    *  [[http://omr-cods.tripod.com/casestudy4a.htm|http://omr-cods.tripod.com/casestudy4a.htm]] 
-      * An x-ray head teardown 
-    * eBay [[http://www.ebay.com/usr/toolsplusmore83?_trksid=p2047675.l2559|toolsplusmore83]]: item 291057383064 
  
ge/ge_1000.1411536508.txt.gz · Last modified: 2014/09/24 05:28 by mcmaster