I usually opt for 550's because I have lots of spares, but nothing against 775 if the gearbox is up to it _________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
Sun May 24, 2015 11:05 pm
miles&Jules Experienced Roboteer
Joined: 19 May 2010
Posts: 3973
Location: ipswich QLD
I've been scoring my Dewalt motors for $40-60 (depends on exchange rate/shipping) from a few eBay sellers. _________________ https://www.halfdonethings.com/
Tue May 26, 2015 7:46 am
Knightrous Site Admin
Joined: 15 Jun 2004
Posts: 8511
Location: NSW
quote:Originally posted by Knightrous:
Initial inquires are looking to be around $60-65 landed without a motor (just matched pinion).
We have 20 units in bound, price will be $70ea, price breaks for bigger orders.
Will have an update on the motor situation shortly. _________________ https://www.halfdonethings.com/
Fri May 29, 2015 1:27 pm
maddox
Joined: 21 Dec 2006
Posts: 786
Location: Belgium
€100 for 2, without P&P or import tax.
Tempting. Will ask the team about ordering 2 sets.
Fri May 29, 2015 2:48 pm
Philip Experienced Roboteer
Joined: 18 Jun 2004
Posts: 3842
Location: Queensland near Brisbane
What ratio(s) did you get? What are the measurements? Does it need a support bearing? _________________ So even the rain that falls isn't actually going to fill our dams and our river systems
Sat May 30, 2015 6:36 am
seanet1310
Joined: 08 Nov 2006
Posts: 1265
Location: Adelaide
to continue on from Philip's questions, with the largest motor you are thinking of using what are the dimentions looking like as a rough estiamte. _________________ Remember to trust me, I am an Engineer.
Just wondering if anyone has used one of these MY1084 24V 250W gear motors with a BotBitz controller?
I have blown various controllers in the past, quick reverses seem to cause the problem.
They have rare earth magnets and I suspect they induce some sort of voltage that most controllers don’t like.
Aaron had one on farm boys lifter. Seemed to go ok. _________________ Steven Martin
Twisted Constructions
http://www.botbitz.com
Sun Aug 02, 2015 7:13 pm
Rotwang Experienced Roboteer
Joined: 15 Jun 2004
Posts: 1589
Location: Vic
Thanks for the quick reply; unfortunately when I looked at Aarons build thread just now it appears that he has used the regular ferrite version.
Not to worry, my turn to do a little research. _________________ Satisfaction is proportional to effort and results.
Sun Aug 02, 2015 8:10 pm
andrew
Joined: 16 Jun 2004
Posts: 3110
Location: Castle Hill, Sydney. N.S.W
I used one in my fail sportsman robot. Zero issues. _________________ Andrew Welch, Team Unconventional Robotics
Sun Aug 02, 2015 8:22 pm
Knightrous Site Admin
Joined: 15 Jun 2004
Posts: 8511
Location: NSW
The recent most incarnation of Farmboy was to use a 450W version of the MY1018Z motor, however they were not in stock. For a drive train, I'm not sure how they will go since they will probably have some nasty voltage spikes, but considering the voltage spikes the winch motors can throw at times and the 85A's have handed them, I've got some confidence that they will work. _________________ https://www.halfdonethings.com/
Mon Aug 03, 2015 8:02 am
Nick Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
Could you use a bidirectional TVS diode with a breakdown voltage around 26 - 28V to clip spikes from the motor? _________________ Australian 2015 Featherweight champion
UK 2016 Gladiator champion
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