Nope, that's all correct, remember to add the stroke length 'S' to get the hole-to-hole installation dimension. The diagram is based on a 100mm stroke so the 105 + S length is 205mm
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Nope, that's all correct, remember to add the stroke length 'S' to get the hole-to-hole installation dimension. The diagram is based on a 100mm stroke so the 105 + S length is 205mm
18V motors are now available from the website, take a look here:
http://www.gimsonrobotics.co.uk/other/GR01-screen.jpg
Or, for just the motor, see here: http://www.gimsonrobotics.co.uk/HRS550_ ... motor.html
Looking forward to giving the 18V motors a try
Thank you all who've ordered the 18V motors already, including you Chris!
Just a notice to say that I'll be away for a week from Tuesday and whilst there will be someone around to run the majority of the store, I will be taking the GR01's down until I'm back (as they require a bit more preparation for each order). If you're wanting a motor within the next week then please order by 2pm Monday!
Looking forward to trying them, arrived today according to the wife - quick posting there Ewan
Been working away, and still am :(
My new robot chassis is all welded up so going to have some fun posting up the build :D
Ordered some tz85a to control, going to have a bash at hacking them myself
Got mine today too Ewan, fantastic service as always. Hopefully have them going in no time.
do people glue their tyres on, the ones im using just come off????
Ewan ?
I screw the tyres on with small flathead screws. It works for us. Sometimes I add carpet tape in between.
On Tron I use glue and screws. seems to work ok
Either should work if you need it, at the price they're at it'd be infeasible to spend more time glueing/adding screws for all wheels sold.
The website will be updated with GR01 and other product stock tomorrow, there's been a large number of pre-orders in the last week so please allow for next day dispatch (for orders not yet placed) rather than same-day for now!
Ewan, it says that you have discontinued the 14.4v motors. Do you have any left over as I have just burnt out one of mine in testing or will I have to replace the motors with the new 12v/18v ones?
I've got a couple kept aside for this reason, please PM me if you need one/two and an email address to send an invoice to, price still at £7.50/ea
Prices for 9.6V GR01's and 9.6V HRS550 motors have been reduced to clear, now only £21.90 and £4.90 each respectively.
These will soon be replaced by a 12V version as well as another new product which has been under development for some time, watch this space!
This is the last warning for GR01 stock, there are only six motor/gearboxes left (aside from those already reserved), once these are gone that's it as this product is being discontinued. Grab them while they're still available!
Anyone with a GR01 already don't worry, there's full spares stock available of everything besides 14.4V motors, please get in touch if you need anything.
Just ordered 2 motors why are they being stopped?
In due course they will be replaced by the GR02's. More information about these will be released in a couple of weeks. These will however be more expensive than the GR01's currently are.
Why are you stopping the GR-01's? They are brilliant motors! I know they have small flaws but they are very good for the cost and great for first time roboteers.
Thanks for the vote Eventhorizon, but Hannibalito 4 drives rather well on the Gimson 9.6V GR01's
In the long run the GR01's haven't proven financially viable- although low on material and parts cost they require too many man-hours to fabricate and assemble, and it's time I have less and less of!
I think you'll be pleasantly surprised at the increase in quality of the GR02's for not-that-much of an increase in price. As I say, more will be announced soon.
And veterans as well, proves how good they are/were, point still stands though.Quote:
Originally Posted by maddox10
Can't wait for the GR-02s now, but I really hope they fit in the same mountings or I am stuffed with Conker!
That's it for the GR01, the final stocks have been sold. As previously mentioned, spares and customer support will still be available for all GR01 owners.
I'll just leave this here
https://lh3.googleusercontent.com/-x...26226702_o.jpg
nice, liking the shiny look :D
been waiting for these to come out for massacre's drive :)
Perfect, just as i'm looking for a drill drive replacement
The shaft looks quite a bit longer?
if your talking about your 4WD overhead spinner, using GR-02s are gonna cost a bomb!Quote:
Originally Posted by harry hills
paper rounds better pay well down south
Oooooooooooooo :D
Can you give us the specs yet? What is the weight and dimensions etc?
And the longer shaft might solve my wheel jamming problems.
someone spending money on a robot?! for shame.Quote:
Originally Posted by archie2000
also, i don't really have the weight for legit 4wd and i don't have the budget for dewalt powerdrives so a couple of these will move the thing.
The can't be that much more expensive - we wont know exactly until Ewan puts them on the site but my guess would be £30-35 each, still very well priced if that is true.
Giggidy :lol:Quote:
Originally Posted by Max
These look pretty good. One of the issues I find with my GR-01s is the threaded inserts start to pull out if tightened too much. I probably shouldn't tighten them up so much but I always worry that they'll come loose in the arena if I don't. So I'm liking the switch to tapped aluminium.
All in all, another nice unit Ewan. Got a couple of new robots on the way soon so they should come in handy.
Looking like it'll be £30 for the 12V version and £33 for the 18V.
Two reduction options will be available, 36:1 (as before) and 24:1, which would provide performance similar to the drive in Cobalt. All gears will also be available separately.
The exposed section of shaft is indeed longer (43mm) while the body itself is more compact owing to a smaller bearing and lack of plastic inserts which took up considerable space in the GR01.
The overall size is 40x40mm down from 45x45mm previously.
At the moment the shafts are out getting flats milled on them (which should expand the range of mounting options), once they're back then more pictures and specifications will follow.
Well Ewan they sound the business but my engineering input would be to reduce the length of the shaft. Easier said than done i'm sure but such a long unsupported shaft with a bored out center could have bending issues from large impacts.
The shaft length is completely intentional given that some people will want the added flexibility of increased mounting space and those that don't can simply take a hacksaw to it. If you were using the full length you'd of course be well advised to support the end of the shaft (which the internal bore can help with) or if intending to use the 3/8 UNF threaded section for direct wheel mounting then the first portion of the shaft could be fed through a bulkhead with its own supporting bearing. The internal left-hand 5mm bore is 21.5mm deep, stopping half-way along.
well I'm going to order a couple of the 12v ones asap :)
Very exciting! I'm going to buy an 18v 36:1 for testing. I have three robots on the go now, so I will be ordering more stuff soon Ewan
They really look fab. And for the price they'll be brilliant. But, as Gary sort of said, I fear the shaft being unsupported like that may cause problems. Not sure if it's now just one bearing in the front or two smaller ones or something, but a less supportive bearing setup and the leverage aspect of having a longer unsupported shaft could become an issue?
I realise you can support on the other side of the shaft to help with this, but if these are still mostly aimed at beginners then that sort of thing is beyond many. If it can't simply be screwed in with a wheel bashed on then I can see people being put off.
But, time will tell. Might well be fine. The two reduction options is very interesting.
Ewan - rather than flats (which with a bench grinder / angle grinder you can do) did you consider keyways?
It's a single bearing this time just behind the front aluminium face. The dual bearings previously did indeed provide good support but there wasn't any real flexibility for mounting, I don't know anyone who didn't mount on the end of the threaded portion (which was the design intention), whereas with the GR02 the idea is that multiple mounting positions are now possible. This arrangement is similar to the Banebots gearboxes in the US, and just as they do I will be putting in the product documentation disclaimers against users placing large loads on the end of an unsupported shaft, as well as guides for good mounting practices. If you mounted close to the front face you'd be very unlikely to need additional support at the end, and if you did mount at the end, as I've said before, incorporating support at the beginning of the shaft can be as simple as adding a bulkhead-supported bearing to the first few millimetres of the shaft (rather than having to implement outer support).
The target for these motors isn't really beginner roboteers - that would narrow the market scope far too much especially as so many of them go down the 'must get the cheapest option' route these days and some even considered the GR01 expensive. The addition of a shaft flat follows this thinking by targeting users of other hobby and industrial planetary gearmotors where this is a standard option, certainly fitting sprockets/gears/pulleys will be more straightforward.
A keyway was considered but found to be both more expensive to implement and potentially too weakening to the 12mm shaft section whose final few millimetres coincides with the left-hand centre-bore.
Are the mounting points in the same place as in the GR01's? So the same depth and width apart and M5 Bolts?
The distance between the hole-centres is slightly narrower at 18mm (from 19mm previously) and the distance between the front and rear holes is now 29.5mm (from 41.5mm)