My HTD5 belt is slipping / skipping ! Enertion single drive mechanical kit

General Discussion
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#1

Hey !

I have an enertion single drive mechanical kit that I had lying around for more than 2 years now and I finally decided to use it again. It had one problem, the belt skips when accelerating/braking to hard, tried to fix that today but nop, it still is the case ! I have the 16T pulley on the motor shaft, it is a Turnigy Aerodrive SK3 - 6374-192KV . I have a Flipsky Dual FSESC4.20 100A but I’m only using one motor, and a 6S 20C 5Ah lipo battery for the moment.

Whenever the belt skip, it does it only one time and then it stops accelerating/braking (it cuts the power), I then have to center the triger and accelerate/brake again, and still if I push it too hard it slips. I don’t know why the power cuts like that, I think it’s from the VESC but what ? Two years ago when I used a hobby ESC it just kept slipping like crazy if I didn’t release the trigger.

I even tried to tension the belt way more than you are supposed to but it still skip ! :frowning:

Here are some pictures :

[Album] Imgur

The last pic is a video where the motor is blocked and I apply as much torque as I can on the wheel with my hands, results : the belt skips even by hand (note that I have to put everything I had to do it, but it does skip !) So if it is slipping with my hands, I don’t know how it’s supposed to hold up to a 4000W motor (even though I don’t use more than 1600W because of my configuration).

So is there a problem somewhere or is it just that the kit is bad ? I mean yes there are not a lot of teeths in contact with the belt (on the motor shaft) but If enertion sell such a configuration, it’s supposed to be hold the torque right ?

#2

Try a slightly shorter belt. If oure using a 265 go to a 260, or what ever your belt size is

#3

What is it going to change ? If the two axles get closer it’s just going to engage less teeths on the motor isn’t it ?

#4

Is it possible to show video?

Belt slippage is usual due to over sized belt, too small of a motor pulley (16t is fine), or using 3m tooth profiles. Do you know what belt you use?

Edit: in the picture it does appear to be 5m, just want to make sure.

#5

Thank you so much for your help, Please check the imgur the video is at the very last :slight_smile: It’s hard to see but when the camera shake it skipped. Yes it’s a HTD265-5M, I understand the motor pulley size and tooth profiles but I really don’t get why would belt size be a problem ?

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#6

Are you running a 12mm wide belt?

#7

Yes I am !

#8

Uh oh… That may be your problem. Im not positive as i dont have hands on you build. Anyway you can try going 15mm?

I use the same setup you have minus the mount and different belt size. Even on 15mm i still get slippage but its only under heavt heavy braking.

#9

By it’s my problem do you mean I bought something that isn’t made to hold up to a lot of torque ?

If going to 15mm will only give me a 25% increase in torque I don’t think it’s that good :frowning:

I’m kind of mad at enertion, they sold it saying it was a good combo with their 2400W motor but it’s not even capable to hold up to such torque.

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#10

Stop throwing % around lol. 15mm will handle the torque better than 12mm. Going dual would make it handle the torque even better.

Diagnosis: I do believe your problem is going to be running a single 12mm belt.

Solution: Uprade to a 15mm setup, have a beer/soda and call me in the morning.

I wouldnt say you bought the wrong thing or even that enertion sold you “shit”. 12mm is fine if youre running a dual setup. But on a single 6374, its a little under par.

#11

Well I don’t see why the increase in torque wouldn’t be linear. 15/12*100=125% So if it really is 25% I mean yes it’s better but still…

By the way, if I tweak the settings of the VESC well, I manage to get a configuration where It doesn’t slip but I was looking for something more “zippy”

My order was a " MONO DRIVE MECH KIT", everything was included, I didn’t buy parts here and there so if it is sold as a mono drive kit it should be able to hold the torque

#12

You can play with throttle curves (for acceleration) and you can adjust your motor negative (battery min i believe) for when braking.

#13

What they wont tell you is, on a single 12mm wide setup, its not par for a single 6374. 12mm is good for running dual. Sinle 15mm will work better. Single 20mm will work great. Follow?

#14

Are you able to post screen shots of your vesc settings?

#15

I’ll see what I do, will give you the vesc settings when I get back, what do you want them for ?

#16

You’re just thinking too hard here, your pulleys look fine.

The belt is probably just loose, it needs to be shorter and then it won’t slip.

#17

I tightened it like crazy once but it was still slipping. About shortening the belt, can you please explain me how it’s going to affect the slipping issue ? I really don’t get it :frowning: From what I understand if I use a shorter belt the axles will be closer and it’s going to engage less teeths on the motor ?

#18

Oh I meant either moving the motor or shortening the belt if you can’t, if you’ve done that and it’s still slipping I don’t know really… it’s all pretty simple mechanics.

Bin it :smiley:

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#19

Oh okay ! Well I’ll see what to do but, thank you all for your help !

#20

Are you using a bearing in your wheel pulley? It looks like you are, just to make sure…

Adding a bearing to my wheel pulleys stopped all my skipping problems.