Invacare TDX SP 2 NB (Narrow Base)

[sin85]

considering you have seat lift, how did you manage to move seat back? is the lifting column now closer to the front of the seat? how many cm did you move?
the controller that you have, what are its advantâges? is oem programmer available? where?
did you widen the existing rims or did you get new ones? how did you do it or where did you get them?
i am putting all these questions as i am considering getting this chair and would do the same modifications.
thanks

[Burgerman]

considering you have seat lift, how did you manage to move seat back?

Spanners and built in adjustments, moving a few things to different positions, combined with not allowing the seat to go flat at 0 degrees, or forwards to -4 degrees as stock with 2 spacers. Or the elevating legs motor hits the seat mounting if not. And because theres no swing-aways, so also no caster problems.

is the lifting column now closer to the front of the seat? how many cm did you move?

7cm , yes.

the controller that you have, what are its advantâges? is oem programmer available? where?

Advantages are that with a complex seat setup, you can see whats happening, and easily choose the right option, set say profile 5 and reduce its speed and graphically see whats going on, etc. I used a REM24 and its hard to know whats going on. OEM? Easy! PM me.

did you widen the existing rims or did you get new ones? how did you do it or where did you get them?

On a brushless motor the motor itself forms half the rim. So making it wider is the only sensible option or you need to go to larger 10 inch rims. And that limits starting torque. How? Spacers, longer bolts, and a ring of steel sheet and pop rivets!

i am putting all these questions as i am considering getting this chair and would do the same modifications.
thanks

Its all pretty easy. But test a brushless chair before you buy!

Its quite am amazing to me that these are not more popular. There are fancier chairs on the market, and some more complex seating that offers more extreme angles etc. But at a high cost. And those are not brushless! As stock, esp with swing aways, and 30 feet long, with garbage programming it likely puts people off. Why do they not sort it out as I have, and tell the world about the brushless chairs they make?

Advantages:
Once reconfigured a bit, and with centre footplate, (the power centre plate option limits how far back the seating can be moved) it is a massive improvement over a long, un-steerable stock chair. But I realized this would be the case when I ordered it. Thats WHY I ordered it! As it is its good outdoors, but heavy and big indoors. I wouldn't want it for in the house or to drive from. But its great for outdoor range, comfort, and for relief if you suffer sores or need to reach high. Or if you are the sort that needs to sit higher at the bar! That doesn't interest me but some find this useful.

I dont like the tatty looking seat back. And am looking to see what else is available. Or get something made locally that is fabric sewn, padded and looks smart. Any suggestions? Maybe dark grey suede or something.

May make one from upholstery foam, then take it to be finished locally like a modern car seat.

[Burgerman]

You want one of these? How much in HK? If available.

http://www.invacare.com/cgi-bin/imhqprd ... y=HongKong Ask them!

[sin85]

with maroon or dark cherry red lateral supports???

[Burgerman]

?

[shirley_hkg]

You want one of these? How much in HK? If available.

http://www.invacare.com/cgi-bin/imhqprd ... y=HongKong Ask them!

Can't have it without £12K .

[Burgerman]

[markatavairagya]

Where did you purchase the chair and what model is it thanks?

[Burgerman]

Any invacere dealer, ring around for best price. One is a TDX SP NB. The other is a Storm 4 Xplore. I dont recommend the storm unless you are light and can modify it. As stock they have zero torque and so cannot turn and need Cof G moving back and reprogramming to be usable. And mine may be returned soon since it has inadequate torque for the job.

[Burgerman]

Its a shame, as I liked it. But its gone back to its maker for a full refund.

But even after moving seat back, etc, and careful programming, this chair does not have adequate starting torque for turn in place or threshholds from 0mph***. At my 20 stone weight. It claims to be good for 23.6 stone. But its just not.

So as long as you are under around 13 to 14 stone, you may be OK.

For the tech minded the problem is like this. A relatively low level of torque requires a truly massive BATTERY current at or near stall. And the programming allows this only for an instant, as it is trying to protect battery, loom, fuse etc. It then rolls back to a level that will not move the chair while it waits for everthing to cool. So if you are heavy, demand any sort of rapid turn acceleration, forget it. Its good side is that it really does take just 2 amps with both motors running at max speed to power the controller and brake, and motors. So on a long run range will be massive. So if you are light its still worth considering as long as you reprogram it pretty severely.

Its stock programming is nothing short of abysmal, and akin to driving a hovercraft. That can only be fixed to around 70% of what I would expect from a well programmed brushed chair. With a normal dealer or even OEM programmer. However theres IS a way to increase turn acceleration and turn deceleration from the normal maxed out settings of 70 and 100 by a considerable margin. This helps a lot to make it steer properly. But I should not divulge how its done just here! If you have any brushless chair and dont like its vague steering email me....

(***or it does but not for long enough, or only a couple of times)