Gimson Robotics

[shakesc]

received my bearing block today
Looks good and fits well

[ewan]

shouldn't that read either two M5X8mm screws

Ah yes, thank you for alerting me to the typo, has now been amended!

look good Ewan, though id make those shafts shorter with the thread closer to the bearing....

The output shaft is based on a one-size-fits all basis, to have a variety of sizes would be considerably more expensive. When the wheels designed for these motors are released they ought to do away with the 'overhanging' wheel arrangement many people presently use as the nut insert will be designed to be used on the far side of the wheel with a 12mm inside bore surrounding most of the remaining shaft length. In this way the wheels will be significantly closer to the support bearing(s) than if their bodies hung off the far end of the threaded section as is typical with today's Blue wheels.

received my bearing block today
Looks good and fits well

Good to hear Chris!


Details on a range of wheels are still being worked on, I will update when more becomes clear. There should be 75mm, 100mm, and 125mm diameter versions available.

[shakesc]

turning the wheels around (so to speak) is something I did with GR01 and some robochallenge wheels. Just drilled them out a bit more and ran a tap through the thread. Benefit is that it makes a more compact unit as well

[ewan]

Absolutely, the whole package of wheel and motor ought to fit comfortably within 145mm if arranged this way.

[Eventorizon]

I have reversed the Robochallenge wheels on both of our new machines. It makes it 25mm shorter; 40 if you go by the wheel position.

But caution! I found that when driving the wheels would tighten onto the front face of the motor. This happened to one and it burnt out the motor in a massive cloud of smoke! The way to stop this is to add a M8 washer onto the shaft and remove all the plastic up to the bolt on the inside of the wheel. The means as the wheel tightens if comes to rest on the washer, not the motor.

If these new wheels do the same thing but are designed for it, I will probably swap to make the set up more reliable!

[ewan]

We have recently changed motor supplier for 550 sized motors and as a result we have been able to reduce the price of the GR02's, now only £29.50 for the 12V version and £30.50 for the 18V version.
The motor prices have also fallen, now £5.90 for the 12V and £6.90 for the 18V.

There is the possibility of 24V nominal motors being added in future, I am currently in discussion with the manufacturer.

Finally, there's only a handful of 9.6V motors left, priced at a paltry £3.90 each, catch them while you can.

[shakesc]

Ewan

you pulled the notification of wheels coming soon off the website

Have you shelved the plans for a while?

[ewan]

Hi Chris,
Yes unfortunately - I'd been discussing with the Robochallenge guys since early November about Gimson Robotics becoming the exclusive outlet for a new model of wheel they've been developing, but they've kept putting the date back due to various projects. I still hope we can put something together but for now I haven't any idea when anything will be ready. As soon as things progress I'll be sure to post here again.

[ewan]

We've now taken delivery of a custom batch of 24V 550 type motors for products including the GR02. There's still testing, photo taking and website updating to do however, so expect these to be online later next week.

[Shakey]

Just as I was thinking about overvolting my 18V ones to a 6S LiPo. ha, should have waited.