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My experience with the slider  

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eb19db15d9d72ca1321e962048df7741?s=80&d=mm&r=g
(@charles-ross)
Active Member Customer
Joined: 1 year ago
Posts: 11
18/06/2020 12:48 am  

Hi MisterMaker. I think you are providing a lot of positive direction to getting these units up to par. Thank you.
I can source an assembled 4 wheel carriage plate locally that will make for a sturdy moving base on a 20×20 extrusion. I will still need to print out a new turntable and gear/belt drive assembly so I will be following this thread, hoping STL files come of it.

I have the original 2 rod design and it’s on hold until I can figure out this sturdier retrofit.

A lingering question on gearing if anybody can answer this: How different is the control of travel and rotation if the original board of the 2 rod version is used with any of these upgrades or modifications? i.e. the original has turntable gearing of 10:100 teeth.


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9a931c0fafb88011eae13b92d72ab8d9?s=80&d=mm&r=g
(@mistermaker)
Active Member
Joined: 6 months ago
Posts: 18
18/06/2020 10:03 am  

Hi MisterMaker. I think you are providing a lot of positive direction to getting these units up to par. Thank you.
I can source an assembled 4 wheel carriage plate locally that will make for a sturdy moving base on a 20×20 extrusion. I will still need to print out a new turntable and gear/belt drive assembly so I will be following this thread, hoping STL files come of it.

I have the original 2 rod design and it’s on hold until I can figure out this sturdier retrofit.

A lingering question on gearing if anybody can answer this: How different is the control of travel and rotation if the original board of the 2 rod version is used with any of these upgrades or modifications? i.e. the original has turntable gearing of 10:100 teeth.

My current CAD file has a 16:80 but I can push it bigger, if necessary it is slightly better than the original one. 4>5

I am waiting on my package with the TMC 2209 drivers and the nylon wheels, both are in the country so I hope it is here next or this week.
4 wheels is definitely better! There is a chance that the wubble I see in my footage, is caused by the carriage that is bending due to the strain by the wheels.
So I might beef that up, I have some ideas on this.


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eb19db15d9d72ca1321e962048df7741?s=80&d=mm&r=g
(@charles-ross)
Active Member Customer
Joined: 1 year ago
Posts: 11
27/06/2020 4:58 am  

Hi MisterMaker. I think you are providing a lot of positive direction to getting these units up to par. Thank you.
I can source an assembled 4 wheel carriage plate locally that will make for a sturdy moving base on a 20×20 extrusion. I will still need to print out a new turntable and gear/belt drive assembly so I will be following this thread, hoping STL files come of it.

I have the original 2 rod design and it’s on hold until I can figure out this sturdier retrofit.

A lingering question on gearing if anybody can answer this: How different is the control of travel and rotation if the original board of the 2 rod version is used with any of these upgrades or modifications? i.e. the original has turntable gearing of 10:100 teeth.

My current CAD file has a 16:80 but I can push it bigger, if necessary it is slightly better than the original one. 4>5

I am waiting on my package with the TMC 2209 drivers and the nylon wheels, both are in the country so I hope it is here next or this week.
4 wheels is definitely better! There is a chance that the wubble I see in my footage, is caused by the carriage that is bending due to the strain by the wheels.
So I might beef that up, I have some ideas on this.

I am contemplating using a 20×40 profile or two 20×20 profiles set apart. The slider really needs to be stiffer than anything I’m seeing being applied on the JJRobots version. That includes a wide stance for the wheel plate. I just can’t see wheels only 20mm apart resisting much twisting.

A double profile version would be heavier of course but probably something I can live with. 20×20 V-slot extrusion weighs 500g/m so the extra material will add about 350g to my current slider but then take away the original two solid steel 8mm rods. Right now the original version of mine weighs 1500g and yet feels very light.

Gearing – I see the extrusion version STLs of the teeth come to 72:18 and the original is 100:10 so I still can’t get my brain around what that difference does to the speed of rotation. I guess as long as the mathematics to keep the camera aimed at the same spot are correct I don’t have to concern myself. Trigonometry was never my forté.


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9a931c0fafb88011eae13b92d72ab8d9?s=80&d=mm&r=g
(@mistermaker)
Active Member
Joined: 6 months ago
Posts: 18
27/06/2020 9:22 am  

The real issue I had with the gears is that gears don’t 100% lock-up so when I was using the slider not perfectly straight it could wobble in the gears.
It would be way better to make fishbone gears, the 3D printer wouldn’t mind printing fishbone gears or normal so that would be the same. But a belt has 0 slack and is way compacter for the same gear ratio.
I really wanted to mount a tripod head and the big bearing fits nicely under it, I see no reason to use bearings on the side, for now.
I do have my bearing not fixed properly. This is also the case in JJ design and I did the same mistake. It’s an easy fix in CAD but I have to dismantle the carriage again.

Still the biggest noise I have is a wobble, I think it is the 3D printed wheels. Still waiting on that package with the normal wheels. It’s waiting customers clearing…
On the 20×20 or 20×40 I don’t know, extra weight would be good, since it vibrates pretty easy now. But I don’t see any bending.

Check my latest design here:
https://twitter.com/MvdH74169613/status/1274731337186934786


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9a931c0fafb88011eae13b92d72ab8d9?s=80&d=mm&r=g
(@mistermaker)
Active Member
Joined: 6 months ago
Posts: 18
15/07/2020 8:21 pm  

Update on my progress.
https://twitter.com/MvdH74169613/status/1283478733526048771
I noticed the devia board has a little switch. I want to try and use this to switch moving directions.
Note sure if I could just flip?

 dir_M1=0;
 dir_M2=0;

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350a26dd49eb55d3494500240423a207?s=80&d=mm&r=g
(@robotn1)
Honorable Member Admin
Joined: 5 years ago
Posts: 687
26/07/2020 10:05 pm  

Update on my progress.
https://twitter.com/MvdH74169613/status/1283478733526048771
I noticed the devia board has a little switch. I want to try and use this to switch moving directions.
Note sure if I could just flip?

 dir_M1=0;
 dir_M2=0;

Use this TEST code as reference. It uses (just) the A-button to turn/off and on the DEVIA´s LED

You can easily create a STATE value that can be changed pressing the A-button. That “flag” can change the spinning direction of the motor/s

The code provides a very good idea about how to use the button for your purposes. I hope it helps!


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(@michaelmcfarlane84)
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Joined: 3 months ago
Posts: 3
09/09/2020 12:47 pm  

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22e9f5ae7c13798b10c87d445d58dfb2?s=80&d=mm&r=g
(@michaelmcfarlane84)
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Joined: 3 months ago
Posts: 3
09/09/2020 12:47 pm  

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