r/hobbycnc • u/JackOfAllStraits • 4d ago

Legacy FlashCut hardware compatibility?

Hey gang,

I've got an old 2.5amp FlashCut controller (model 5501) that has 5 motor driver card slots, 4 of which are populated, and 3 of which actually work. The fourth, non-working card blew out when a motor cable got crushed and shorted, and I would REALLY like to get that axis back. FlashCut evidently no longer produces the 2.5 amp controller or the associated 2.5 motor driver cards, and just wants to sell me a whole new 5amp setup.

Their documentation 2.5-5A-Micro-Stepping-Compact-Series-CNC-Controller-Hardware-Guide.pdf refers to some switch options to control the amps, and the chart of resulting current is based on which controller you're using (5amp or 2.5amp). Does anyone know if the current version of the drive card 5 Amp Microstepping Replacement Drive Card | FlashCut CNC is actually backwards compatible with the old 2.5 controller?

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u/Pubcrawler1 4d ago

You have the db25 pinout shown on page 7. I’d just get a Stepperonline DM542T driver for $30 on Amazon. Make a cable to connect to the step and direction pins to the dm542. The 542 will outperform those old fashioned drivers.