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Thanks for the info you received on some tests.I've been wondering what is the lowest Voltage for these steppers that still have reasonable torque.Still didn't get the ones you sent me.What are the part numbers (Mouser) of these driver chips? They look like QFN packages that require a properly made PCB due to the small pads sizes and clearances.The chip is soldered using solder paste put down with a mask and then re-flowed in an oven or with a hot air re-flow tool. Also note the large (sic) pad on the bottom of the chip. This pad also needs to be solder to the pcb and is the main transport of heat out of the chip. I do designs with chips like that but no longer try to solder them. We have board assembly vendors and re-work people that are very good at doing these. A stereo-microscope is also required just to see these well enough to place them correctly on the pcb pads.For a commercially produced pcb and assembly these chips are not a problem.Now wait until you see the 0201 resistors and caps needed.
Steve, received the stepper you sent. Should have some time over the weekend to run tests on them.
What total weight would 4 of em do?
Thanks Steve.Sorry but I have no idea what you are asking about.RC = resistor-capacitor? radio Control?RX = receiver?QuoteWhat total weight would 4 of em do?4 of your micro steppers?How much weight will they lift? Is this the question?This will depend on the mechanics connected to the stepper.Four steppers together should lift four times what one stepper will lift (minus losses due to several factors).