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04-08-2018 #1
For the next part of the Roland retrofit puzzle, I'm looking for some low current stepper drivers.
I had thought about some TB6xxx's given their low cost, but I'd like something with a bit more current adjustability, as I'm not sure what current I'll need, and the 0.5A jump in settings seem a bit high.
The original chips are TEA3718, which have a maximum current of 1.5A, but I'd guess are being pushed no where near that hard. Unfortunetly I can't seem to work out what current they're set to use, as the datasheet doesn't list any clear cut formula, and the final current is a result of motor feedback and resistors.
I've had a look at the 3D printer options, and although things like the Polulu and DRV8825 stuff ticks the boxes in terms of voltage/current adjustability, they're all DIP mount.
Any other cheap options to consider, or are some TB6600's and hoping 0.5A is good enough the most convenient option?Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
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