Author Topic: SX100 stage motors  (Read 2916 times)

Probeman

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SX100 stage motors
« on: March 23, 2016, 10:27:05 am »
We're waiting for Cameca to respond with a price on a new stage (X) axis motor (ours has a shorted winding), but wonder if anyone has a source for this motor that might be more direct and hence cheaper?

See attached photo.
john
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Probeman

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Re: SX100 stage motors
« Reply #1 on: March 23, 2016, 04:14:51 pm »
We're waiting for Cameca to respond with a price on a new stage (X) axis motor (ours has a shorted winding), but wonder if anyone has a source for this motor that might be more direct and hence cheaper?

See attached photo.
john

Attached below is a place you can order these motors for a little less(!) than what Cameca charges, but you'll have to use the old wiring harness and connect it up yourself.
The only stupid question is the one not asked!

Probeman

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Re: SX100 stage motors
« Reply #2 on: March 28, 2016, 01:51:36 pm »
We're waiting for Cameca to respond with a price on a new stage (X) axis motor (ours has a shorted winding), but wonder if anyone has a source for this motor that might be more direct and hence cheaper?

See attached photo.
john

Attached below is a place you can order these motors for a little less(!) than what Cameca charges, but you'll have to use the old wiring harness and connect it up yourself.

After further investigation by our in-house engineer, it appears Cameca's "The Amazing Edgar" correctly diagnosed our stage problem remotely.  He must have incredible psychic powers.   ;)

The problem appears to have merely been a bad solder joint in one of the power resistors on the motor wiring harness board. Easy fix once we figured it all out!

Thank-you Edgar!
« Last Edit: March 28, 2016, 01:53:07 pm by Probeman »
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Owen Neill

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Re: SX100 stage motors
« Reply #3 on: June 08, 2020, 11:53:05 am »
After further investigation by our in-house engineer, it appears Cameca's "The Amazing Edgar" correctly diagnosed our stage problem remotely.  He must have incredible psychic powers.   ;)

The problem appears to have merely been a bad solder joint in one of the power resistors on the motor wiring harness board. Easy fix once we figured it all out!

Thank-you Edgar!


Hi John,

Necroing an old thread here, but do you have any more details on this repair? Chasing a problem with my X-axis that sounds very similar, and suspecting the solution may be similar as well.

Thanks,
OKN

Probeman

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Re: SX100 stage motors
« Reply #4 on: June 08, 2020, 01:52:17 pm »
Hi Owen,
Not really. I just know that our in house engineer had to re-solder all the power resistors in there as they run really hot and had de-soldered themselves.  After re-soldering them all, his ultimate solution was to add a series of additional cooling fans to the front of the stage as seen in this post:

https://probesoftware.com/smf/index.php?topic=639.msg8574#msg8574

Cameca makes a great instrument, but the SX50 and SX100 models seem to all have some cooling issues somewhere...  I have no experience with the new SXFive instruments however.
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Owen Neill

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Re: SX100 stage motors
« Reply #5 on: June 08, 2020, 02:53:58 pm »
OK, thanks.

sem-geologist

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Re: SX100 stage motors
« Reply #6 on: June 08, 2020, 05:26:55 pm »
I want to give my 2 cents. I would say that problem with Cameca old boards and power resistors is that on some boards they are soldered with common/ normal solder (solidus 183 C) while it should be soldered with HMP solder (high melting point solder, 95% Pb, 2% Ag, 3% Sn, solidus at 300C). HMP is a bit tricky to do correctly, as any contamination by Sn lowers solidus and renders it useless. I got impression that different boards got assembled by different teams, and some boards got less attention to the engineering details. I swear that Cameca assembled some of electronics with eco-compliant (RoHS/ Pb-free) garbage solder on our newest machine - we had tin whiskers causing problems with a stage three years ago. So if it is old machine - de-soldering is very likely, and if it is a new - rather tin whiskers or cracked solder joints due to embrittlement is causing problems.
« Last Edit: June 08, 2020, 07:44:32 pm by John Donovan »