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Unread 17-12-2013, 15:38
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Re: Drive with tallons

A little off topic, but how many MOSFETS are in parallel? #MOSFETS/4. Also, what are the rating for each MOSFET, not the Talon? I'm just wondering how much overload can the transistors take without breaking! If anyone has the info, it would be nice, and I could look at the datasheet if I had the model numbers.
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Unread 17-12-2013, 15:45
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Re: Drive with tallons

Quote:
Originally Posted by cgmv123 View Post
Yes, sorry for not making that clear.

884's will definitely work, but I don't know how 888's will work since their switching frequency is slightly higher than the 888's.
I expect the Victor888 will have the same issue as the Jaguar or Talon with window motors. Stick with the obsolete 884 or search CD for info on how to remove the lock pin. If you don't need variable speed, a spike could work and would not have the lock pin issue.

The purpose of the lock pin is to hold the car window up when no power is applied. The faster pulses of the modern speed controller does not give the pin time to engage/disengage. Of course, you could use this feature to hold up an arm or some other object that works against gravity.
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Unread 17-12-2013, 15:59
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Re: Drive with tallons

Also, has pricing for motor controllers changed while we are in the offseason still? i.e. will these motor controller prices remain this way all season? I swear I remember at least jags and victors being around $40-50 and now Jags are $80 and Victors are $70? and I thought even talons were around 50, but now they are $60... This just seems odd, and I don't remember these numbers before. Can anyone verify them?
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Unread 17-12-2013, 18:45
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Re: Drive with tallons

I don't blame these companies for changing their prices to stay with the demand. They need to earn money and support the workers. I agree that the prices keep changing and it isn't anything new. I haven't been paying close attention to the prices, but I believe the prices will drop upon build season because the demand will increase. That means that the supply will increase too!
If the demand goes up, the supply goes up to cope with the demand. When the supply goes up, the price should go down, because the company is operating much more efficiently! Please let me know if my economics are wrong because my knowledge is rusty abter not being used for two years
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Unread 17-12-2013, 19:23
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Re: Drive with tallons

Quote:
Originally Posted by jbsmithtx View Post
Also, has pricing for motor controllers changed while we are in the offseason still? i.e. will these motor controller prices remain this way all season? I swear I remember at least jags and victors being around $40-50 and now Jags are $80 and Victors are $70? and I thought even talons were around 50, but now they are $60... This just seems odd, and I don't remember these numbers before. Can anyone verify them?
Last year, Victor 888's were $50 and Talons were $60. However, last year's prices were surprisingly low. Victor 884's used to cost $90. Jaguar prices varied, but I think the lowest price ever was $70-75 with a team discount and regular price was around $100.

We'll have to wait until the season to see if Vex offers special pricing during that period. Maybe they'll match the price of Talons...
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Unread 17-12-2013, 19:28
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Re: Drive with tallons

Quote:
Originally Posted by cgmv123 View Post
You can use Talons with every motor except Window motors. The switching frequency will disrupt the window motor's locking pins (just like the Jaguar's similar switching frequency also messes with the locking pins.)
I've heard this a bunch on CD, but I have yet to see it actually happen. We ran 3 window motors on jags last year on our practice bot, and 2 this year on victor 888's with no problem. We didn't remove the locking pins.
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