I suspect that you're still not giving us a full description of your circuit and mechanism. I say this because you say it has limit switches.
A few things to note about limit switches:
(1) They're typically low demand micro-switches.
(2) They typically control the coil or control circuit of SS & electromechanical power relays.
(3) They usually don't carry the motor current except for very small motors.
(4) Their typical use is to limit a mechanism's travel and only override said limit if and when the user has initiated a travel in the opposite direction.
With keeping number (4) in mind this begs the following question that only makes sense of this entire thread if your answer is yes.
Does your system currently employ a manual Forward / Reverse switch or switches?
Regarding a suitable Stepper Relay:
AK provided a link to Digikey that shows a very clear photo of one. I provided a hyperlink to AK's post in my last reply. Why search any further?
Random thoughts:
I find great joy in deciphering the never ending, ceaseless, interminable, incessant, "Guess what the f!ck I'm doing", posts. In fact they're more fun than having a root canal or a vasectomy without anesthetic!
Request:
Post as many sharp photos of your contraption as you can. Doing so will probably eliminate a lot of guesswork.
Chris
A few things to note about limit switches:
(1) They're typically low demand micro-switches.
(2) They typically control the coil or control circuit of SS & electromechanical power relays.
(3) They usually don't carry the motor current except for very small motors.
(4) Their typical use is to limit a mechanism's travel and only override said limit if and when the user has initiated a travel in the opposite direction.
With keeping number (4) in mind this begs the following question that only makes sense of this entire thread if your answer is yes.
Does your system currently employ a manual Forward / Reverse switch or switches?
Regarding a suitable Stepper Relay:
AK provided a link to Digikey that shows a very clear photo of one. I provided a hyperlink to AK's post in my last reply. Why search any further?
Random thoughts:
I find great joy in deciphering the never ending, ceaseless, interminable, incessant, "Guess what the f!ck I'm doing", posts. In fact they're more fun than having a root canal or a vasectomy without anesthetic!
Request:
Post as many sharp photos of your contraption as you can. Doing so will probably eliminate a lot of guesswork.
Chris
I agree with CDRIVE's concerns abut the limit switches. Pending additional information, here is a first pass at a motor reverser. The hard part is finding a power relay that will switch 24 Vdc at 10+ A reliably and doesn't cost a fortune. DC switching is very different from AC switching in terms of the relay contact material and pressure. You might have to move up to a higher power relay called a contactor.
Circuit A assumes that both throws of the power relay can handle the 10 A requirement. Circuit B might actually cost less because the power relays are a more common configuration.
ak
Circuit A assumes that both throws of the power relay can handle the 10 A requirement. Circuit B might actually cost less because the power relays are a more common configuration.
ak
Motor spec sheets generally show two ratings, or performance curves, there is continuous torque (current) that starts out at maximum at zero rpm and stays fairly flat up to the max rpm rating, this is the current the motor can handle continuously without damage. The other is the peak torque curve and should only be entered for a very short duration, otherwise damage to the motor can occur.
Maximum torque usually occurs at zero rpm.
M.
In reality we don't even know if any of his 24V circuit is grounded. I used ground because it's easier to follow on a schematic, doesn't clutter it with superfluous and crossing conductors, but above all because spice rebels against ungrounded circuits. Come to think of it..I'm old and very set in my ways too.
Chris
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