Hi Guys,
I’m doing a Pick&Place machine conversion from stepper motors (really slow) to BLDCs with oDrive. I’ve got some good 8 pole pair inrunner motors but I’m having some problems sourcing a proper encoder. With a P&P machine you want high speed, but also high resolution. I’ve already got one of these at home:
https://at.rs-online.com/web/p/bewegungssensoren/7951141/
Nice and quite expensive device, but it seems it’s not fast enough. The max frequency of the encoder output signals (HTL inverted) is 200kHz. So for a resolution of 4096 PPR, the maximum RPM is:
200.000 * 60 / 4096 = 2929
Which is a bit low, since the motor can do 6000 RPM. At this point I don’t quite yet know if I’ll be able to run the machine at 3000RPM, but I don’t want the encoder to be the limiting factor. I’ve looked around for other 58mm sized (or similar) encoders, and they all seem to be limited to the 200kHz signal frequency. Has anyone been able to source something faster (potentially cheaper as well) ?
Thanks for any tips,
Marko