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#136
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Re: Back for more..VEXpro 2014 Product Unveiling
I can't seem to find a CAD file for the versablocks on either site, has anyone found this?
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#137
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Re: Back for more..VEXpro 2014 Product Unveiling
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Last edited by AlecS : 12-12-2013 at 12:00. |
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#138
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Re: Back for more..VEXpro 2014 Product Unveiling
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That's how I'd look at it. The piston is an externally attached COTS item that is being included for your convenience. |
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#139
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Re: Back for more..VEXpro 2014 Product Unveiling
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#140
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Re: Back for more..VEXpro 2014 Product Unveiling
West Coast Products too! I haven't purchased from you guys before, I might have to give some of your items a try this year.
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#141
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Re: Back for more..VEXpro 2014 Product Unveiling
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#142
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Re: Back for more..VEXpro 2014 Product Unveiling
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Unfortunately, I don't have a data sheet to back this up. We spoke directly with a few belt manufacturers, off the record on this topic. Of course those users who would prefer GT2 belts can purchase them from any number of suppliers. VEXpro has chosen HTD based on the feedback we received, and some simple preliminary testing. If you have any concerns, feel free to email prosupport@vex.com to discuss further. -John |
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#143
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Re: Back for more..VEXpro 2014 Product Unveiling
While I don't have numbers to back this up, 256 made a belt drive in the offseason and tried out both HTD and GT2 belts and pulleys, and while the GT2 ratcheted when we went full forward to full reverse, the HTD stayed strong and kept its hold on the drive. I would definitely go with HTD again.
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#144
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Re: Back for more..VEXpro 2014 Product Unveiling
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Good question. Of course -- we cannot comment on 2014 legality, but I appreciate your question was asked in reference to the 2013 rules: The PTO shaft and associated components (VersaDog, etc) are easy to use by themselves without purchase of the entire WCD Dual Speed Gearbox. These items are sold as part of the 217-3636 kit for $74.99: http://www.wcproducts.net/wcp-shifter-components/ Based on our interpretation of the 2013 rules, we believe these would have been legal for use last season, if they were around then. ![]() -John |
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#145
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Re: Back for more..VEXpro 2014 Product Unveiling
I thought the tiny new hex broached VersaWheel was pretty cool. What led you guys to making it 3.25" in diameter? I'm glad it is available!
Last edited by Akash Rastogi : 12-12-2013 at 12:47. |
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#146
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Re: Back for more..VEXpro 2014 Product Unveiling
So they can continue to make their drive modules lighter and more compact?
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#147
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Re: Back for more..VEXpro 2014 Product Unveiling
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#148
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Re: Back for more..VEXpro 2014 Product Unveiling
Given that HTD is at this point a de-facto standard while GT2 is a proprietary profile*, I don't think a lot of belt manufacturers would want to go on the record with an unbiased recommendation. Gates is going to say that GT2 is the way to go, while everyone else will say HTD.
In reality, a wise designer would probably want to have enough of a safety margin that either profile would not ratchet. * A brief Google search couldn't confirm or deny this, but it is my recollection. I'm sure that CD will correct my statement if it is incorrect ![]() |
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#149
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Re: Back for more..VEXpro 2014 Product Unveiling
I meant more like is it intended for drive systems, or can we expect a line of smaller wheels coming out soon to compete with Banebots wheels for grippers and intakes and such. If so, that would be very cool.
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#150
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Re: Back for more..VEXpro 2014 Product Unveiling
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I would agree with your statement completely. We on 2168 used the GT2 extruded stock and machined our own press fit colson hubs to drive GT2 15mm belts. We designed our wheel spacing for exact C-C distances for belt lengths supplied by SDP-si. After about 60 hours of vigours driver practice including pushing matches practicing defense before bag and 7 competitions (on and off season), we have been still using the same exact belts in practice all fall and under finger pressure the belts will stretch no more than a .5 inches. Also despite our best efforts we have never produced the "ratcheting" effect. We also used HTD back in 2012 for our shooter, and again designed with the proper C-C distances for a specific belt size, and once again after many hours of use, never had an issue with ratcheting. That robot was in a fundraiser last week with same belt and still shoots like a charm. :-) In short, based on our experience, I would agree with JVN that both will do the job, just fine. But of course if you have the option you should buy HTD ;-) Last edited by lnex1357 : 12-12-2013 at 14:17. |
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