EC3 Connectors are now discounted to clear stock for new products, get them while they last!
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EC3 Connectors are now discounted to clear stock for new products, get them while they last!
EC3 stocks have long gone and stocks of 50, 150 and 200mm actuators are back.
Please note that GR01 motors will not be available between May 5th through to June the 10th, so please do stock up if you'll be needing some over that time.
Bearing covers for the GR01 are finally in and pictures will be coming tomorrow.
The bearing cover alongside a GR01 with one fitted:
http://www.gimsonrobotics.co.uk/prod...ring-cover.jpg
Ewan, for your GLA-S actuators, if you increased the voltage to its max with the 14.4v models what would the extension speed of the actuator be? I am guessing that at 14.4v it extends at 20mm/s.
Also are the 24 or 18v versions of the motors that go on the GR01's? I have been searching but cant find any.
Hi Alex, please refer to the operating characteristics table on this page for the actuator speeds: http://www.gimsonrobotics.co.uk/GLA-S_l ... uator.html
You'll see that at the nominal voltage the 14.4V model will travel at 34mm/s when unloaded.
I haven't been able to find 18V or 24V nominal versions of the 550 motor used widely available, despite having looked all over the place- the few suppliers who might have a viable motor require minimum orders in the hundreds so it's not really an option for this market. You should find that with the right conditions (heat-sinking/fan cooling and/or current limiting) you could run the 14.4V motor at as high as 21V, but you'd have to be careful- certainly not do what I've seen some people do and tape up the cooling vents on the motors!
That's if you're after extra power and speed though, if you've just got a high voltage robot and want to use GR01's then just set the travel limits on the transmitter to 3/4'ers or so on the driving channels, so that the motors will never receive the full supply voltage from the speed controllers.
has anyone attempted to run the 14.4v versions on a 6s lipo?
Give it a week and i will be able to test that for you :) Though i will need a new base...
sweet!
I`ve got two 14.4 motors running on 4s 4000mah lipo, loads of power but havn`t done any combat yet.
We had our first fights in with a set of Gimson GR01's.
Went fine in that department.
We've had a new set of mounting brackets made up for our actuators, CNC milled from 6061 Aluminium:
http://www.gimsonrobotics.co.uk/prod...t_rear_GLA.jpg
Supply of new GR01's has now been halted until mid June. Get in touch if you're in need of any spares/product advice.
The GR01 motor is now back in stock and reverting to the original price of £23.90/each. Every motor now also comes with a free bearing cover.
The GR01's have been re-priced to better reflect the differing availability of the 9.6V and 14.4V motors, the 9.6V model starts at £22.90 and the 14.4V at £24.90
We will soon be adding a 12V actuator rated for 4000N (407kg) to the collection, which some of you here may find useful- more information will be added shortly.
Gave it a quick run today. Its fast, very fast but the motors got very warm after only 5 mins light driving and that was with the covers off outside on a cool day.Quote:
Originally Posted by Danjr1
I will add that 1 of the gearboxes is stiff (probably damaged by NST) so take that into account but under battle conditions (given these results) it would be risky to go 6S.
do you recon cooling mounts could be made for them (with a fan in?)
any video.of the test drive Alex?
Yeah, that's not really surprising. As I've mentioned before to get away with running the 14.4V motors at 22.2V you'd need to heatsink the motors and/or set travel limits on the transmitter so that the motors don't actually receive the full voltage from the speed controller(s).
Heatsinks are widely available for 550 sized motors, e.g: http://www.ebay.co.uk/sch/i.html?_from= ... Categories
The fans that come with some of these heatsinks are quite small and potentially fragile though, and it may be better to design fans into the robot chassis if using them.
No video, sorry. I can do it again if you like and video it though Ewan is right. Build fans into the chassis and fit some heat sinks that way you know you are giving the motors the best chance possible.
Ewan, are there any 18 or 24 V motors that have the same mounting points as the 14.4's you currently use?
18V 550 sized motors do exist but they are pretty hard to find (only in a handful of 18V cordless drills, most will be 700 sized motors), I've not been able to find any drill or motor manufacturer who can supply them directly at the sub-100pcs quantities I'd need them in.
The website has been updated with a larger model of actuator capable of 400kg at 12V:
http://www.gimsonrobotics.co.uk/prod...m-overview.jpg
I'm getting a 404
Works fine for me
Try hitting refresh? Might have taken a while for the server to update.
Refreshed a few times and it's still giving me a 404, but it may just be my browser. Will give it time.
In fact (for the technically minded amongst you) I've recently changed host and hence the DNS settings of the domain, apparently this can take a while to filter through to all page requests which might explain why some can access the page (which is only on the new host) while others cannot. Not anything I can do but wait in this case I'm afraid!
Prices for the spare 9.6V 550 sized motors have been cut. Grab your spares while they last.
Coming soon...
12V 550 motors
18V 550 motors
24:1 gearboxes
The first new products are expected to go online in mid-September, contact us for advanced orders
18v? YESSSSS!!!!! POWER!!!!
Good news, that! That's Tormenta 3 sorted. :P
i hope that 6wd project x or whatever its called isn't using them.
Jarvis is using six GR01's, yes.
Mwahahahaha! :twisted:
On the GR-01's, there is a red dot on the back of the motor. Does that indicate the way to wire it up to get clockwise rotation from the motor. Or is there another way to tell without wiring it up?
In the time it took you to write that could you not have just put a battery on it? :S
Don't forget the gearbox may reverse it and that clockwise is different depending on which way you look at the motor, a mistake I made once, do'h!
Didn't have a battery available but I have one now :-) I was just trying to save myself from having to repair my NiMh pack but I have fixed it now so I can test all I like :-D
hi, does anyone know the total length of a gr01 with a robochallenge blue wheel attached? i'm sure it's been asked before but the search function isn't bringing up any results and after a flick through most of this topic I haven't seen it.
@ Ewan or anyone that knows :)
The dimensions on the webpage for the GR01 show the shaft to be 35mm long but in the picture that measurement doesnt fit the propotions as the nylon block next to it 26mm, looks about the same size
any help?
might just be me being thick lol
cheers
Ah, the diagram is a bit unintentionally misleading there, the shaft length is specified in the 'build detail' table as
'Shaft type: 15mm x 12mm diameter steel then 14mm long 3/8 UNF external thread with 5mm left-handed internal thread.'
The overall dimension also includes the connection tabs on the rear of the motor hence the discrepancy, I will adjust it now.
How far long a blue wheel will sit on the shaft depends on the depth of the nut pressed into the wheel- I've had some blue wheels with a side lathed flush to the centre before the nut is pressed and some with nuts pressed straight in so the wheel over-hangs a shaft by at least 10mm more. I don't know if Robochallenge has standardised how they make them now so couldn't say 'this wheel will be positioned here' etc.
Also apologies on not getting back to you earlier Alex, I've just got back from holiday!
There's lots more in the pipeline, 18V GR01's will be released in under two weeks, bit of a website refresh coming and then more still, it's going to keep me busy!
Thanks Ewan
sorry to keep bringing this point up but the measurements on this linac again are confusing
http://www.gimsonrobotics.co.uk/GLA750_ ... uator.html
maybe the 99mm motor measurement is off?