Increasing Handicare Puma 40 Speed

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Increasing Handicare Puma 40 Speed

Postby Cally » 16 Sep 2019, 12:56

Hi there! I have a Puma 40 that's about 5 years old now, it has served me really well, including falling down a ravine in it :D
Recently I've been doing some activities that require a little more speed than it currently gives me (I think it's 6mph?) and I was curious how I would go about increasing the speed, plus how risky it would be?
I'm obviously hesitant to make any adjustments to it based on the fact that it is my only chair and it's been brilliant up to now, but I can't escape the fact that it's not really meeting my needs either.

Thanks in advance :)
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Re: Increasing Handicare Puma 40 Speed

Postby Burgerman » 16 Sep 2019, 13:00

You would need to fit the 8mph version of your motors. And unless you can manage with a lot less torque you would need to fit the 120A power module too. It MAY already have one, not sure what was fitted on the 6mph version.
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Re: Increasing Handicare Puma 40 Speed

Postby Irving » 16 Sep 2019, 13:54

6MPH Puma40 could be 60A Shark, 90A DX, 90A or 120A R-Net or 90A VR2 as all were offered as options, but generally would have been either 90A VR2 or 120A R-Net.

LIFePO4 battery pack + reprogram for 24v instead of 21v + larger 110/80 rear tyres will give increase from 6.4 to 7.5mph with minimal torque loss.

@Cally, what controller is yours fitted with?
Puma 40, 75Ah LiFePO4 (pic is on tour @ Whistler, BC)
Puma 40 backup, 73Ah MK (for now)
Spectra Plus (weedy 40Ah MK)
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Re: Increasing Handicare Puma 40 Speed

Postby Cally » 16 Sep 2019, 14:14

Thank you the replies! I'm finding it hard to find exact specs on what my model of Puma 40 is fitted with due to the newer models of it being quite different.

https://www.ebay.co.uk/itm/New-Invacare ... SwOQJdamR8
This is the controller on my wheelchair. :)
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Re: Increasing Handicare Puma 40 Speed

Postby Irving » 16 Sep 2019, 15:09

That's strange, how old is your chair? There is little difference between a 2011 model like the one I'm sitting in right now and a 2016 model like my spare and a recent 2018 model.

Can you post a pic of your chair?
Puma 40, 75Ah LiFePO4 (pic is on tour @ Whistler, BC)
Puma 40 backup, 73Ah MK (for now)
Spectra Plus (weedy 40Ah MK)
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Re: Increasing Handicare Puma 40 Speed

Postby Irving » 16 Sep 2019, 16:01

Cally wrote:Thank you the replies! I'm finding it hard to find exact specs on what my model of Puma 40 is fitted with due to the newer models of it being quite different.

https://www.ebay.co.uk/itm/New-Invacare ... SwOQJdamR8
This is the controller on my wheelchair. :)

If that is the joystick then you have the 90A DX2 motor controller.
Puma 40, 75Ah LiFePO4 (pic is on tour @ Whistler, BC)
Puma 40 backup, 73Ah MK (for now)
Spectra Plus (weedy 40Ah MK)
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Re: Increasing Handicare Puma 40 Speed

Postby LROBBINS » 16 Sep 2019, 18:48

That e-bay listing is pretty typical of an ignorant seller. The headline says Shark joystick, yet the "Item specifics" says DX2-REMB-AC52 (which is NOT Shark, but DX2). I suspect that Irving is right. Do note that the 90A DX2 power module also has a short term boost. My memory says that this is a few seconds at 120A per channel just like the RNet 120.
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Re: Increasing Handicare Puma 40 Speed

Postby Irving » 16 Sep 2019, 19:15

LROBBINS wrote:That e-bay listing is pretty typical of an ignorant seller. The headline says Shark joystick, yet the "Item specifics" says DX2-REMB-AC52 (which is NOT Shark, but DX2). I suspect that Irving is right. Do note that the 90A DX2 power module also has a short term boost. My memory says that this is a few seconds at 120A per channel just like the RNet 120.

Yes, I noticed that too. The 'look' of the Shark REM (left) and the DX2 REM421 (right) is similar to the uninitiated.

shark v DX2.png
Puma 40, 75Ah LiFePO4 (pic is on tour @ Whistler, BC)
Puma 40 backup, 73Ah MK (for now)
Spectra Plus (weedy 40Ah MK)
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Re: Increasing Handicare Puma 40 Speed

Postby rover220 » 16 Sep 2019, 20:25

the dx2rem a/b joystick use the old shark joystick housing so most people would not know the difference.
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Re: Increasing Handicare Puma 40 Speed

Postby LROBBINS » 16 Sep 2019, 20:29

But if you go to buy one you'd best be sure which you're getting - their serial protocols are different. Shark is, I think, RS485 while DX and DX2 are a CAN variant.
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Re: Increasing Handicare Puma 40 Speed

Postby Irving » 16 Sep 2019, 20:37

Before Cally does anything I think we need to clarify exactly what chair he has!
Puma 40, 75Ah LiFePO4 (pic is on tour @ Whistler, BC)
Puma 40 backup, 73Ah MK (for now)
Spectra Plus (weedy 40Ah MK)
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Re: Increasing Handicare Puma 40 Speed

Postby rover220 » 17 Sep 2019, 08:15

It will be a later puma 40. Dx2 was not available on the yes series.
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Re: Increasing Handicare Puma 40 Speed

Postby Irving » 17 Sep 2019, 08:49

Cally wrote: I'm finding it hard to find exact specs on what my model of Puma 40 is fitted with due to the newer models of it being quite different.
rover220 wrote:It will be a later puma 40. Dx2 was not available on the yes series.

Agreed, but I was having some difficulty with Cally's statement since there is relatively little variation in Puma 40 specs.
Puma 40, 75Ah LiFePO4 (pic is on tour @ Whistler, BC)
Puma 40 backup, 73Ah MK (for now)
Spectra Plus (weedy 40Ah MK)
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