Thanks for the advice; I really appreciate that you took the time to type all that up.
Much of it confirms what i already thought or had read on-line, or that i already learned the hard way in various other robotics competitions. Good to know im on the right track. On Sat, Aug 10, 2013 at 8:47 AM, TyngTech <[email protected]> wrote: > 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. > -- Isaac Goldman 5142334423 This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. -- -- 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.
