The 'ultimate rev counter' thread...

[z3t4]

I hadn't used stripboard for ages until I made Les's Tacho x2. Much more used to the joys of UV boxes, FeCl3 etc. I have now resolved never to use stripboard again. It's just too much hassle checking for shorts between the strips :sad:

ecat's Eagle .brd looks good. Must investigate ...

Just a thought about the design spec. Three features of Les's design that I really liked were

• the use of the Allegro gear sensor (it's as good as gold; no messing with slotted discs/foil/Tipp-Ex etc, very reliable, very robust -- just needs to be mounted tangentially 1-2mm from teeth)
• the capacity to accommodate a non-standard number of pulses per rev (65 in the case of the ml7 bullwheel)
• a one pulse per rev output (useful for my Shumatech DRO's).

HTH

John

[irving2008]

I hadn't used stripboard for ages until I made Les's Tacho x2. Much more used to the joys of UV boxes, FeCl3 etc. I have now resolved never to use stripboard again. It's just too much hassle checking for shorts between the strips :sad:

ecat's Eagle .brd looks good. Must investigate ...

Just a thought about the design spec. Three features of Les's design that I really liked were

• the use of the Allegro gear sensor (it's as good as gold; no messing with slotted discs/foil/Tipp-Ex etc, very reliable, very robust -- just needs to be mounted tangentially 1-2mm from teeth)
• the capacity to accommodate a non-standard number of pulses per rev (65 in the case of the ml7 bullwheel)
• a one pulse per rev output (useful for my Shumatech DRO's).

HTH

John

All of which are on my list... I started looking at how to fit to my minilathe and quickly decided a slotted disc wasnt going to fly (or should that be 'rotate'?) Since we have some fixed gears, clearly a reluctance sensor is the way to go, so started looking for something suitable..

The software design already accommodates a 'divide by N' feature as Rick needs /50 for his, and I will need something for the minilathe and if I do one for the mill too Im sure that'll have a different value. I haven't yet decided how to set this.. probably a jumper and a push button... at power up if jumper present go into setup mode and each press of the button increments the 'divide by count' from 1 to 100, hold it down 5sec is increment by 10... release button for 10sec, store in eeprom

One pulse per rev is easy...