100DP Digital Position indicators, 4 digit, Dynamic Technology models ?

Hi Chaps,

Approx 18 years ago, Dynamic Technology in Perth used to supply these

4 digit LED digital position indicators, they were used on guillotines and other back gauging metal position equipment, around 50 to 100 were made, initially by Dynamic then by me as it was originally my design for Dynamic, sold a few to Westralian Equipment/Pretron Electronics and their national machine tool agents... There was a variant the 100A which was used to measure angles on pan brakes and other angle position tools.

Specs:-

100DP 4 bright 0.8" LEDs with resolution to 0.1mm, Range -99.9 to 999.9mm Over-range indication -ovf to ovf (Count retained during overflows) Transducer voltage options, 5v, 15v, power at 4Watts supplied Transducer ratio options, x1, x2, x4, /2 (by jumper links on rear) Transducer type required is quadrature with 50 or 100ppr for backgauge DIN panel box RS part 508-683 Input power 240Vac Max 10VA, or use DC input

100A As above but reads -99.9 to 180.0 degrees No ratio options, used 256 pulse per rotation transducer Option input resets position to 0, 180, or 90 on switch open or close

Interestingly, although the design was done in 1986 and the last production run finished in 1990 I've had about 3 come back to me recently from all these years ago and from all sorts of different places, I have now stocked up enough parts to service and repair these units. Main failures in the early days were the transformers as the units were placed in boxes with minimal ventilation and also there might be some vibration damage. At the time there werent any other counters/indicators around that had large digits and were simple to setup and supported for more than 8 years !

Anyway, if you come across these, I am reporting I am in a position to service and repair these for as long as parts are available, which could be at least another 5 to 10 years - not bad for a product that has been in use in some metal shops continuously since 1986. Can also service and repair the rotary transducers that were often supplied with them, I recall they were either 50 or 100 pulses per revolution on geared down backgauges.

If you also come across one, I'd like to hear from you and if you want to repair it yourself, thats fine just email me and I can supply enough technical details and spare PLDs at reasonable prices :)

email here: 100dp at niche.iinet.net.au

in email above replace 'at' with @ and take out the spaces

Thanks,

ps: Pictures arranged on request email or through this news group,

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Regards
Mike
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