As the first and only current operator of a 24v EVW drive system in the hobby, I say welcome to the family but be warned! EVW's at 24 volts are special beasts that will require a resolute nature and unfailing faith in your technical prowess to tame!
Steve Tyng Advice in no particular order: - These motors are timed CW or CCW. Have a matched set or re-time as required: http://redneckrobots.com/ev/mod.htm - Remove the internal case grounding and add suppression caps: http://www.robot-village.net/images/vi/build/debil.jpg http://www.robot-village.net/images/vi/build/dremeltab.jpg - Review the T040 Cromwell build log: http://rctankcombat.com/tanks/T040/index.cgi - If you can get them, use the OEM harnesses to wire to your controller. - Use the same gauge as the OEM for battery to controller. - Build STRONG motor mounts - Build a STRONGER transmission - You will need a PWM controller. Don't even think of using the old style on/off TriPact controllers - A single 80A fuse before the controller has worked well for me going on 8 years - Motor shafts are 8mm, buy an 8mm bit to bore your motor sprockets. Use a lathe for boring if you can - You will need effective air flow over the motors for cooling - A 9:1 reduction will get you over 8MPH but limited run time on a set of 18AH SLA's. - A 11:1 reduction gets you 6 to 7MPH with an hours run time on fresh SLA's - Using only setscrews on a round (or slightly flattened shaft) will fail. Keyed shafts, cross pins, etc. highly recommended in your drive-train design - At workable reductions, these motors will shred your drive-train before they stall Good luck! On Thursday, August 8, 2013 7:50:57 PM UTC-4, True North Armouries wrote: > > Update; I just received a set of EV motors, and am almost at the stage of > mounting them in the tank. I have a few questions concerning EV motors > though for people who know about them. Im planning to run them off 24 volts. > > Id like to know what rating on the fuse and relays people use, as the > datasheet claims a stall current of over 100 amps. Id like to know how many > Ah the batteries should be. Lastly, do i need the ev wiring harness or do > the tabs accept standard sized crimp connectors? > > On Sunday, July 7, 2013 8:46:19 PM UTC-4, True North Armouries wrote: >> >> Hi all, >> >> I started working on my t34-85 this past Canada Day, though ive been >> doing research and electronics work since Easter. I'd like to take a moment >> to thank Steve for the T34 plans; for my first tank im really grateful to >> not have to scale any drawings before I can start sawing. >> >> Ive been looking at motors, and I need some advice; most of you seem to >> have EV motors, which are increasingly hard to find. I have done a fair bit >> of looking on-line, and have come to the conclusion I have no idea how >> many watts my motors should be. I found someone selling 350 watt 24 volt >> scooter motors for a good price, but I wanted to know what you guys think, >> seeing as some of you have far more experience. Is 350 watts per track >> enough power, or is it going to be sluggish and i should look for at least >> 500-600 watts? >> >> >> Thanks in advance, >> >> Isaac >> > -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
