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1624E012s495 w/ 141:1. 1624E refers to the motor model, 012 refers to 12 volt. I don't know what the 123 refers to. I have figured out, and measured, the TG. At least on the 12V motor (1624E012S123) and I measured a little on the 6V motor too and it seems to be the same scheme. I cut the socket off the cable, leaving 6 ends. One side is marked black. The motor - is on that marked one and the motor + on the opposite side, on each outermost side of the cable. The shaft rotated CCW with this polarity, which is standard on motors, but not necessarily on gears. The TG logic I assumed to be 5V, although it ran on 3~6 V, but I would not put on more than so on it. It may not like reversed polarity. The output is a nice, symmetrical, square wave with good rise time, it will work fine as fast as the motor can go. I ran the 12V motor (and the logic) on 6.00V and got a period time of 800µs on a descent oscilloscope, => 1250 Hz. The geared output (1:141) did 45 RPM. 45/60x141 = 105.75 RPS on the very motor. 1250/105.75 = 11.82 pulses per rev, but as this has to be an whole and even number it is likely 12 pulses per rev. There are two outputs, running in quadrature. I call them Q1 and Q2. They did not need any pull-up resistors, and can thus drive CMOS logic directly. I suggest using the "4000-series", running on the same voltage (3 ~ 6V) as the TG. A transition in one takes place while the other is at rest, high or low. Thus there are 4x12 transitions per motor revolution and 1/48 of a rev can be detected. On the geared shaft there will thus be 12x141 = 1692 pulses, and 6768 transitions, per rev. The pulses are relative the Tachogen - line. Motor - (this one has a black mark) The motor and the TG does not have any galvanic connection, although one can certainly connect the two bottom ones together, and the two top ones too if the voltage is less than 6V. To count the signals, use an up/down counter. Connect one output to Clock and the other to the U/D input. Use the Carry output to chain to more counters. The counter chain, as long (as many digits) as you want will now count up for one direction of rotation and down for the other. Switch Q1 and Q2 if it goes the wrong way. For such a counter, "4000 series up down counter" on Google gave a million hits! 4029 came up, but I do not have the time to read through it. Be aware of that there are decimal and binary counters. The former count to 10 (which may be what you want if you want to display with digits) and the latter to 16 which will make a nice, linear interface with an D/A converter or computer. These, 4000 series, are very rugged and almost for free. Check at Digi-key (.com) for price and availability. It looks like 4029 can be set on pin 9 to be either binary or digital! http://www.kpsec.freeuk.com/components/cmos.htm#4029 You see the carry in and out (5&7) and clock (15) and U/D (10). It is just to wire it up! On the index page http://www.kpsec.freeuk.com/components/cmos.htm they warn for to leaving unused inputs floating. Take this warning seriously! The four outputs from each counter, QA ~ QD, are connecteed to a BCD to 7-segment decoder/driver, for each digit, and now you have nice LED digits on the counter, as many as you want! Info on faulhaber motors and encoders can be found here (cut and past the URL into your browser): http:// /products/productdisplay.asp?CPTID=18&ExpandProductID=62&ActiveTab= http:// /library/docs%5Cproducts%5C1524_S.PDF http:// /library/docs/products/HE.PDF http://www.faulhaber.de/zip_pdf/produkte/kat_2000/6_praezisionsgetriebe/dG15_4.pdf http://bobodyne.com/web-docs/robots/Trippy/MicroMoEcoder.pdf http://www.minimotor.ch/Press_info/2232SR/e/eE512.pdf (all content is the responsibility of the poster) |
Corina.vaughan@oklahomaselltoday.com (Corina Vaughan) for more information. All emails will be forwarded to the poster's actual email address.