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Linak (PierTech) lifting column alternative from AliExpress

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#1 Taylor

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Posted 06 August 2021 - 07:30 AM

I think I may have found an inexpensive altnerative to the Linak (PierTech) lifting column. 

 

It is Taixi brand lifting column. They have quite a few options on Aliexpress, https://www.aliexpre...-9d46c1f2526d-6

 

I'm considering the type A1 with a 200mm x 200mm top plate, 600mm stroke, and a 24v 2500N at 4mm/s lifting capacity. 

 

If my math is correct the initial height of this column is 760mm (29.9") and it's stroke is 600mm for a final extended height of 1360mm (53.5"). 

 

Not sure if anyone here has tried an AliExpress lifting column yet, anyone care to check my research and let me know if they think this is a good alternative? 

$300 shipped seems like a pretty decent deal for those specs. 

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#2 Taylor

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Posted 06 August 2021 - 07:30 AM

More specs from the manufacturer: 

 

Attached Thumbnails

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#3 GaryShaw

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Posted 06 August 2021 - 07:43 AM

Hi

This is probably technology and design stolen from PierTech with every material and component downgraded in quality. Think about whether that’s honorable behavior and product integrity that you want to support.

Gary


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#4 charlieb123

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Posted 06 August 2021 - 07:57 AM

The extrusions and end plates look quite a bit different than whats offered at Piertech.



#5 Taylor

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Posted 06 August 2021 - 08:10 AM

Hi

This is probably technology and design stolen from PierTech with every material and component downgraded in quality. Think about whether that’s honorable behavior and product integrity that you want to support.

Gary

I dont think anything from this company is stolen from PierTech. PierTech gets their components from Linak. 

And lifting columns aren't a proprietary creation, more than just Linak makes them. 

 

There have been quite a few posts from a few CN'ers who have bought bare Linak columns and got them working as good as a PierTech. 

Which is what I'm considering doing here with this lifting column since Linak columns are hard to come by. 


Edited by Taylor, 06 August 2021 - 08:12 AM.

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#6 StarAlert

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Posted 06 August 2021 - 08:47 AM

I dont think anything from this company is stolen from PierTech. PierTech gets their components from Linak. 

And lifting columns aren't a proprietary creation, more than just Linak makes them. 

 

There have been quite a few posts from a few CN'ers who have bought bare Linak columns and got them working as good as a PierTech. 

Which is what I'm considering doing here with this lifting column since Linak columns are hard to come by. 

That is correct. If anyone is taking someone’s technology, it’s PierTech. I bought my made-in-Denmark Linak DL2 lifting column directly from Linak and saved several hundred $$$ over PierTech.

 

It took about ten weeks for the column to be delivered. They make to order, I believe. 
 

I might be concerned about the quality of a Chinese made version. A lifting pier needs to be pretty accurate for it to work for astronomy purposes. I can extend mine all the way and my mount is still dead-on accurate from top to bottom. 


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#7 StarAlert

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Posted 06 August 2021 - 08:49 AM

2F6D125E 2A23 4FA5 B637 DE2F9709BD77
6980F101 6718 48C3 B10C F0B8B8DCAC7F
D95C06EE 3EED 4548 B309 F00D9950297D

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#8 Taylor

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Posted 06 August 2021 - 09:23 AM

That is correct. If anyone is taking someone’s technology, it’s PierTech. I bought my made-in-Denmark Linak DL2 lifting column directly from Linak and saved several hundred $$$ over PierTech.

 

It took about ten weeks for the column to be delivered. They make to order, I believe. 
 

I might be concerned about the quality of a Chinese made version. A lifting pier needs to be pretty accurate for it to work for astronomy purposes. I can extend mine all the way and my mount is still dead-on accurate from top to bottom. 

The quality is my only concern.

However, some of the stuff I've received from AliExpress is high quality and well made. 



#9 StarAlert

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Posted 06 August 2021 - 09:40 AM

The quality is my only concern.

However, some of the stuff I've received from AliExpress is high quality and well made. 

If you have $300 to burn, it might be worth a try. If it doesn’t work for astronomy, you can repurpose it as an adjustable work bench in the garage or just let the kids ride on it for fun. 


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#10 skybsd

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Posted 06 August 2021 - 10:44 AM

Hi

This is probably technology and design stolen from PierTech ...

roflmao.gif roflmao.gif roflmao.gif

 

skybsd 


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#11 Raginar

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Posted 06 August 2021 - 01:41 PM

Hi

This is probably technology and design stolen from PierTech with every material and component downgraded in quality. Think about whether that’s honorable behavior and product integrity that you want to support.

Gary

That company you mentioned uses a commercial product from a company called Linak.  It's not 'dishonorable' to go DIY. 

 

You can find similar lifting columns on Amazon if you're concerned about buying directly from a chinese manufacturer.  Specs look good; and even if it fails it's not like it'll fall over; just slide down the stroke distance you have it up.

 

I really like my Linak.


Edited by Raginar, 06 August 2021 - 01:43 PM.

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#12 Taylor

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Posted 06 August 2021 - 04:25 PM

900mm, 2250N, 24v lifting column ordered. 

We shall see what the quality is in the next 3-4 weeks. 


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#13 StarAlert

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Posted 06 August 2021 - 05:48 PM

900mm, 2250N, 24v lifting column ordered.
We shall see what the quality is in the next 3-4 weeks.


Good luck!

Edited by StarAlert, 06 August 2021 - 05:49 PM.


#14 Raginar

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Posted 10 August 2021 - 11:04 AM

If you're looking for a controller that can automate it... I used a AstroMC for mine.  It would make sure the roof was 'safe' before commanding a timer to activate a relay on the board to lift it.  I used reflective photo sensors to verify it was 'up' and 'down'.  You do need some type of sensor like that to ensure it's 'down' when you move the roof (assuming you're max performing your horizon lines and need it up that much).

 

Mostly I just enjoyed seeing it move.

 

Enjoy!


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#15 Taylor

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Posted 10 August 2021 - 04:36 PM

If you're looking for a controller that can automate it... I used a AstroMC for mine.  It would make sure the roof was 'safe' before commanding a timer to activate a relay on the board to lift it.  I used reflective photo sensors to verify it was 'up' and 'down'.  You do need some type of sensor like that to ensure it's 'down' when you move the roof (assuming you're max performing your horizon lines and need it up that much).

 

Mostly I just enjoyed seeing it move.

 

Enjoy!

Oh, now that's cool. Hopefully the one I ordered is a good one and I can start using an automated setup. 



#16 jagakajaja

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Posted 11 August 2021 - 08:29 AM

I've wondered about these lifts, even the high quality ones... is the repeatability precise enough for astrophotography without a polar align each session?



#17 Raginar

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Posted 12 August 2021 - 01:39 PM

I've wondered about these lifts, even the high quality ones... is the repeatability precise enough for astrophotography without a polar align each session?

It works. My astrobin photos were 90% shot off my linak.  Polar aligned every 6 months or so for funsies. 



#18 matthew_carlos

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Posted 13 August 2021 - 10:19 PM

how would you secure the telescope mount to the base of it?  I've an ioptron cem60.



#19 StarAlert

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Posted 13 August 2021 - 10:23 PM

how would you secure the telescope mount to the base of it?  I've an ioptron cem60.

You'd need to make a custom plate. 



#20 Christopher Erickson

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Posted 13 August 2021 - 10:26 PM

Drill press, taps, hand tools...

 

 

how would you secure the telescope mount to the base of it?  I've an ioptron cem60.



#21 matthew_carlos

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Posted 13 August 2021 - 10:33 PM

Custom plate -  Anyone know of a reputable machine shop that has made custom plates for ioptron cem 60s?

 

Matthew



#22 Christopher Erickson

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Posted 13 August 2021 - 10:38 PM

*ANY* competent local machine shop should be able to mate the two together nicely for you. Much less precise and critical of a project than machining replacement shafts for high-speed motors and such.

 

But for about the same money you could probably buy a drill press and some taps and do it yourself. Assuming you are at least a bit handy with your hands.

 

 

Custom plate -  Anyone know of a reputable machine shop that has made custom plates for ioptron cem 60s?

 

Matthew


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#23 Taylor

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Posted 14 August 2021 - 08:49 AM

Custom plate -  Anyone know of a reputable machine shop that has made custom plates for ioptron cem 60s?

 

Matthew

https://www.aliexpre....aed24c4d1om1Qy

 

The Aliexpress listing for the lifting column will link to an accessories page, I bought one of their mounting plates. There is a picture of it halfway down the webpage. 

Most likely it should be easy to adapt to an existing mount. 



#24 matthew_carlos

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Posted 14 August 2021 - 08:31 PM

Nice! Which lift did you get?

#25 Taylor

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Posted 15 August 2021 - 07:22 AM

This one: 

https://www.aliexpre....ec9b4c4ddk70Y6

 

900mm stroke, DC24V 2250N 4mms. 


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