RCCrawler Forums

rgf27 · 07-09-2006, 03:30 PM

To start off with, I have an E-Maxx based crawler(first build) with factory transmission and running gear (locked in low) with factory EVX. I have recently puchased the lower 72T Spur gear but am running the factory 16T pinion gear on a 75T Integy lathe motor. I am also using a TQ3 controller. I just got my motor put on to try out and it will not pull an incline near as steep as my upgraded Nylint crawler. The motor acts like it doesnt have the power to turn the tires( LST's). This is my first attempt at building a rccrawler from the ground up so please tell me what I need to do to get this thing climbing. I have talked to others on here about using a 75T and they say it should have all the power I need. Please Help! Thanks RGF

rockwerks · 07-09-2006, 03:40 PM

Quote:

Originally Posted by rgf27

To start off with, I have an E-Maxx based crawler(first build) wtih factory transmission and running gear (locked in low) with factory EVX. I have recently puchased the lower 72T Spur gear but am running the factory 16T pinion gear on a 75T Integy lathe motor. I am also using a TQ3 controller. I just got my motor put on to try out and it will not pull an incline near as steep as my upgraded Nylint crawler. The motor acts like it doesnt have the power to turn the tires( LST's). This is my first attempt at building a rccrawler from the ground up so please tell me what I need to do to get this thing climbing. I have talked to others on here about using a 75T and they say it should have all the power I need. Please Help! Thanks RGF

ou probably need to program the evx correctly and have the +- wires reversed, you are running the speed control in reverse for forward Id bet

rgf27 · 07-09-2006, 03:44 PM

Would u mind explaining to me how to do this.

rockwerks · 07-09-2006, 06:31 PM

Quote:

Originally Posted by rgf27

Would u mind explaining to me how to do this.

unsolder the wires leading from the motor to thw speed control and resolder reverse from current location

mr.maxx · 07-10-2006, 06:02 PM

I dont think the 75T motor can generate enough wheel speed. I run 55T motots in all 3 of my rigs. I have a 65T that I got from Tower and it is too slow. Just my 2 cents. Did re-wiring the motors help?

BrandonW · 07-11-2006, 08:05 AM

75 turn should be plenty, but i found when i was running a single motoer in my emaxx it wasnt enough, the emaxx is a heavy truck, you really should have (2) 75 turn motors, that way they wont overheat.

rockwerks · 07-11-2006, 08:10 AM

Quote:

Originally Posted by mr.maxx

I dont think the 75T motor can generate enough wheel speed. I run 55T motots in all 3 of my rigs. I have a 65T that I got from Tower and it is too slow. Just my 2 cents. Did re-wiring the motors help?

change the gearing a tad to compensate

LOL

peej410 · 07-11-2006, 08:16 AM

first check your ESC dont just unsolder and change the wires. if its correct the truck should be able to climb in forward and reverse. next step is to get the smallest pinion on there you can.

rgf27 · 07-13-2006, 04:48 PM

Thanks for the help. I went to traxxas.com and got the reprogramming procedure for the ESC. That worked a little better. I also went and picked up a 9T Pinion for 75T motor. Results were much better, but I would still like more power. The crawl speed is awesome for the type of wheeling I like, if anything maybe even slower would be better. I dont see how you guys can crawl slow enough with the 55T, but maybe yall have done something different that I haven't. If there's any other helpful info that you can give me it would be greatly appreciated. Thanks RGF

run2jeepn · 07-17-2006, 11:46 AM

how many cells are you running in your battery pack? If you can had a cell that may help with some wheelspeed!

rgf27 · 07-17-2006, 05:13 PM

I was running a 12v 4.3ah nylint battery, but I am redesigning another chassis to run two 6 cell batteries in parallel. The batteries that I have are not matching batteries though. One is a 1500 Shark and the other is a Radio Shack 2000mah. If you can tell me of a cheap good battery to replace these with I would appreciate it. Thanks RGF

slobin3d · 07-17-2006, 06:57 PM

radio shack it the king of cheap 6 cell stick packs they have 3000 and 3300 last i checked and if your lucky you could find some 2000 on clearence. as a side note you should get 2 new batterys to get a better lifespan out of them

silvr_tung_devl · 07-18-2006, 05:00 AM

If your really wanting gobs of torque and little wheelspeed, just use a gd6oo witha 55t lathe. I've seen this setup, and if your into low wheelspeed, this will do the trick.

http://www2.towerhobbies.com/cgi-bin...&I=LXSL79&P=ML

07-09-2006, 03:30 PM	#1
rgf27 Pebble Pounder Join Date: Jun 2006 Location: Palestine, TX Posts: 127	Problem with motivation To start off with, I have an E-Maxx based crawler(first build) with factory transmission and running gear (locked in low) with factory EVX. I have recently puchased the lower 72T Spur gear but am running the factory 16T pinion gear on a 75T Integy lathe motor. I am also using a TQ3 controller. I just got my motor put on to try out and it will not pull an incline near as steep as my upgraded Nylint crawler. The motor acts like it doesnt have the power to turn the tires( LST's). This is my first attempt at building a rccrawler from the ground up so please tell me what I need to do to get this thing climbing. I have talked to others on here about using a 75T and they say it should have all the power I need. Please Help! Thanks RGF Last edited by rgf27; 07-09-2006 at 03:45 PM.

07-09-2006, 03:44 PM	#3
rgf27 Pebble Pounder Join Date: Jun 2006 Location: Palestine, TX Posts: 127	Would u mind explaining to me how to do this.

07-10-2006, 06:02 PM	#5
mr.maxx Quarry Creeper Join Date: Feb 2006 Location: Shillington Posts: 462	I dont think the 75T motor can generate enough wheel speed. I run 55T motots in all 3 of my rigs. I have a 65T that I got from Tower and it is too slow. Just my 2 cents. Did re-wiring the motors help?

07-11-2006, 08:05 AM	#6
BrandonW RCC Addict Join Date: May 2006 Location: USA Posts: 1,043	75 turn should be plenty, but i found when i was running a single motoer in my emaxx it wasnt enough, the emaxx is a heavy truck, you really should have (2) 75 turn motors, that way they wont overheat.

07-11-2006, 08:16 AM	#8
peej410 Rock Crawler Join Date: Feb 2006 Location: glastonbury Posts: 992	first check your ESC dont just unsolder and change the wires. if its correct the truck should be able to climb in forward and reverse. next step is to get the smallest pinion on there you can.

07-13-2006, 04:48 PM	#9
rgf27 Pebble Pounder Join Date: Jun 2006 Location: Palestine, TX Posts: 127	Thanks for the help. I went to traxxas.com and got the reprogramming procedure for the ESC. That worked a little better. I also went and picked up a 9T Pinion for 75T motor. Results were much better, but I would still like more power. The crawl speed is awesome for the type of wheeling I like, if anything maybe even slower would be better. I dont see how you guys can crawl slow enough with the 55T, but maybe yall have done something different that I haven't. If there's any other helpful info that you can give me it would be greatly appreciated. Thanks RGF

07-17-2006, 11:46 AM	#10
run2jeepn I wanna be Dave Join Date: Sep 2005 Location: USA Posts: 11,196	how many cells are you running in your battery pack? If you can had a cell that may help with some wheelspeed!

07-17-2006, 05:13 PM	#11
rgf27 Pebble Pounder Join Date: Jun 2006 Location: Palestine, TX Posts: 127	I was running a 12v 4.3ah nylint battery, but I am redesigning another chassis to run two 6 cell batteries in parallel. The batteries that I have are not matching batteries though. One is a 1500 Shark and the other is a Radio Shack 2000mah. If you can tell me of a cheap good battery to replace these with I would appreciate it. Thanks RGF

07-17-2006, 06:57 PM	#12
slobin3d I'm a stupid C U N T! Join Date: Jun 2005 Location: In the Garage! Posts: 4,307	radio shack it the king of cheap 6 cell stick packs they have 3000 and 3300 last i checked and if your lucky you could find some 2000 on clearence. as a side note you should get 2 new batterys to get a better lifespan out of them

07-18-2006, 05:00 AM	#13
silvr_tung_devl Quarry Creeper Join Date: Feb 2005 Location: Indy-Westside Posts: 306	If your really wanting gobs of torque and little wheelspeed, just use a gd6oo witha 55t lathe. I've seen this setup, and if your into low wheelspeed, this will do the trick. http://www2.towerhobbies.com/cgi-bin...&I=LXSL79&P=ML

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