Chinese tacho – beware

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Chinese tacho – beware

This topic has 45 replies, 20 voices, and was last updated 22 June 2019 at 14:32 by Nick Hulme.

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20 June 2019 at 14:05 #13567
duncan webster 1
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@duncanwebster1
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20 June 2019 at 14:05 #415214
duncan webster 1
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@duncanwebster1
Many years ago I made an electronic tacho for my lathe, using a design I got from somewhere forgotten in the mists of time. It used a PIC programmed in very arcane code. Works fine, but as it updates very very quickly the last digit flickers, and the display is a bit dull. When I fitted VFD to my milling machine I had to make my own tacho as the only sensible pulley to fit the sensor went at a different speed to the main spindle. That updates more slowly and is OK. Decided eventually to sort out the lathe one, and bought a Chinese tacho, no point making one at that price. Problem is the update rate is so slow it's difficult to adjust the spindle speed. OK if you just want to know what speed it's doing, but when adjusting by the time it updates you've gone way past. Original is now back in place, the new one can wait till I need to just measure rather than adjust something.

Of course I should have just plugged it in before making a very nice box for it to sit in!
20 June 2019 at 15:08 #415222
Former Member
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@formermember32069
[This posting has been removed]
20 June 2019 at 15:32 #415224
Michael Gilligan
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@michaelgilligan61133
Posted by Barrie Lever on 20/06/2019 15:08:11:

I feel it is no co-incidence that all of the broken pieces of equipment in my workshop are from the PRC.

.

If you have an iPad … Just be careful to not take that into your workshop

MichaelG.
20 June 2019 at 15:42 #415227
I.M. OUTAHERE
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@i-m-outahere
Posted by Michael Gilligan on 20/06/2019 15:32:21:

Posted by Barrie Lever on 20/06/2019 15:08:11:

I feel it is no co-incidence that all of the broken pieces of equipment in my workshop are from the PRC.

.

If you have an iPad … Just be careful to not take that into your workshop

MichaelG.

Or just about any other electronic device !

Duncan ,

Did you consider using an Arduino to make your new Tachometer? – plenty of sketches available and adjusting the update frequency is simple enough .

Edited By XD 351 on 20/06/2019 15:48:53
20 June 2019 at 16:25 #415238
Former Member
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@formermember32069
[This posting has been removed]
20 June 2019 at 16:40 #415239
Michael Gilligan
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@michaelgilligan61133
Sorry, Barry … I was just teasing

Logic:

Statistical analysis would find two commonalities between the broken items in your workshop:
1. They were all made in PRC
2. They have all entered your workshop
I have no way of knowing which, if either, is causative.

MichaelG.
20 June 2019 at 16:43 #415242
JasonB
Moderator
@jasonb
And the third, you bought them because they were cheaper than a quality brand
20 June 2019 at 16:52 #415244
Former Member
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@formermember32069
[This posting has been removed]
20 June 2019 at 16:56 #415245
Michael Gilligan
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@michaelgilligan61133
By some remarkable fluke … I just found this: **LINK**

https://www.made-in-china.com/products-search/hot-china-products/Multimeter_Fluke.html

MichaelG.
20 June 2019 at 17:14 #415250
Former Member
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@formermember32069
[This posting has been removed]
20 June 2019 at 17:26 #415252
Ron Laden
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@ronladen17547
Barrie, probably produced for Fluke, most of the top mobile phones and cameras are made in China, like you suggest they can equal the best in the world but like top quality from any part of the world you have to pay for it.
20 June 2019 at 17:44 #415261
John Smith 13
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@johnsmith13
I bought a WEN variable speed drilling machine with the same issue that the tacho takes several seconds to catch up with what's happening. I could live with this but the quill is such a sloppy fit that the drill bit blurs at high speed making it unusable for accurate work. I didn't get chance to use this before the 3 month warranty expired. I can see a major rebuild in its future or trip in a skip!!!!

John
20 June 2019 at 17:51 #415266
Former Member
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@formermember32069
[This posting has been removed]
20 June 2019 at 17:57 #415268
duncan webster 1
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@duncanwebster1
…..

Duncan ,

Did you consider using an Arduino to make your new Tachometer? – plenty of sketches available and adjusting the update frequency is simple enough .

Edited By XD 351 on 20/06/2019 15:48:53

Tacho on milling machine is driven by Arduino, it updates 4 times a second. Some of the code is my own work, but as with many Arduino projects you cab crib bits from other stuff o the interweb
20 June 2019 at 18:41 #415278
john carruthers
Participant
@johncarruthers46255
Fluke.

Fluke have 3 factories, 2 in PRC and one in Germany.
The Fluke multimeters are tested and callibrated on an instrument made in Deal, Kent, codename 'Baldrick'.
Each factory has 2 such testers.
The main problem in manufacture is the fake parts in the supply chain.
Even the PRC guys get caught out.
20 June 2019 at 21:48 #415322
old mart
Participant
@oldmart
I have Kennametal carbide inserts made in the USA, UK, Germany and China.
20 June 2019 at 22:56 #415333
ronan walsh
Participant
@ronanwalsh98054
Quite a lot of the large motor manufacturers such as mercedes, BMW etc, have factories in China to make components, or complete cars for those regions. Triumph motorcycles are touted as being made in England, but again a lot is made abroad, Malaysia and India i believe, frames, suspension components, switchgear etc. The design and engines are made in the UK.

So saying anything is rubbish because its chinese, or made in the far east is fraught with danger.
20 June 2019 at 23:14 #415338
Frances IoM
Participant
@francesiom58905
The Fluke multimeters are tested and callibrated on an instrument .. codename ‘Baldrick’.
I guess anything that passes this must be a fluke (always thought they had picked a very poor name for a supposed accurate instrument)
20 June 2019 at 23:15 #415339
Clive Hartland
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@clivehartland94829
When I had the Ford Granada, 3 times I was stranded because the cut off fuel solenoid failed. By this time I always had 2 or 3 spare in the car. I had one examined and x.rayed and it showed that a bunch of wire was sealed at the top of the solenoid, it was made in Mexico. A long phone call with Ford after sending microscope images elicited that they would replace it for me. Strangely after that I had no more incidents.
20 June 2019 at 23:44 #415342
Neil Wyatt
Moderator
@neilwyatt
Posted by Barrie Lever on 20/06/2019 16:25:59:

You are a wise and learned man, can you name me 5 Chinese brand names in mainstream retail? No meaning or agenda in the question.

Interesting question…

Lenovo and Huawei for a start.

Neil
21 June 2019 at 00:02 #415343
Reg Wortley
Participant
@regwortley
Take a look at this **LINK**

I have used two of these, the first on my Optimum lathe, laterly have one fitted to my S7.

Paired with a VFD its something I would not want to be without.

The S7 reads the teeth on the Bull gear and gives consistent readout.

Reg
21 June 2019 at 07:14 #415353
Michael Gilligan
Participant
@michaelgilligan61133
Posted by NZreg on 21/06/2019 00:02:03:

Take a look at this **LINK**

.

Thanks for that, Reg

I did look, and quickly found: **LINK**

http://www.machtach.com/BuyOff.html

…. but was pleased to see that the Docs are still available.

MichaelG
21 June 2019 at 11:13 #415378
Cabinet Enforcer
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@cabinetenforcer
Posted by Neil Wyatt on 20/06/2019 23:44:06:

Posted by Barrie Lever on 20/06/2019 16:25:59:

You are a wise and learned man, can you name me 5 Chinese brand names in mainstream retail? No meaning or agenda in the question.

Interesting question…

Lenovo and Huawei for a start.

Neil

Add Pirelli to that list. Xiaomi are not yet that big in western retail, it won't be long before they are though. Haier sell some own brand stuff, but also own brands including sanyo and candy. Hisense were one of the main world cup sponsors and sell TVs worldwide.
21 June 2019 at 11:40 #415381
Former Member
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@formermember32069
[This posting has been removed]
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