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  #1  
Old Tue 28 August 2007, 17:35
TECHLF
Just call me: Laurent
 
Toulouse
France
www.techlf.com - Drives, USB controllers, control software from France

We are french manufacturer of :

- multi axis USB controllers ( cpu4bu, cnc4bu, tinyCN, miniCN, megaCN )
- steppers motors drivers ( SMD8A )
- control software ( ISA4D )

and more...

http://www.techlf.com

Regards
Laurent FOUGA
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  #2  
Old Tue 28 August 2007, 23:43
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Welcome Laurent.

I have been looking at your USB controllers for a while and I wonder if you have any recommendations on how to get a good USB connection between a PC and a CNC controller? Is there anything special about the PC, the USB port on the PC, or the cable?
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  #3  
Old Wed 29 August 2007, 11:20
TECHLF
Just call me: Laurent
 
Toulouse
France
thanks gerald !

yes, a lot of recommendations !
- use USB2.0 certified cable between the PC and the CNC controller, as short as possible, less or equal to 3m.
- use AC filter (schaffner) for the power supply
- if you can, use Switching power supply instead of Transformer
- put the controller in an aluminium (or steel) enclosure

Let me know if you want a sample (CPU4BU) for testing.

Laurent FOUGA

PS: thanks to GRAND Pierre
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  #4  
Old Wed 29 August 2007, 11:44
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Laurent, some interesting suggestions......

Is a power supply with a toroidal transformer also a problem? I am surprised it should have a filter.

And then I believed that a switch mode supply made much more noise than a good transformer supply?

Thanks for the offer of one for test, but I will be a bad tester. The 2 machines I have built are running full time production by my son and he will not allow me to do any experiments! Maybe one day I build machine no.3 for myself. . . . . .
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  #5  
Old Wed 29 August 2007, 14:50
grandpi
Just call me: Pierre
 
Caussens
France
Techlf first Mechmate customer

Hi Gerald,

I have ordered a complete electronic pack to Laurent to run my Mechmate + the spindles (Elte product) + box. Everything is done by Laurent even the wiring network (sorry for the purists !).

- 1 cnc 4U
- 4 smd8a
- 4 34h098
- 1 Elte pro spindle

As he proposed me, I will met him in september close to Toulouse to have some quick lessons regarding to the software management (Isa4d) linking to the pro spindle management system.

I will tell you end of september if everything work nice and correctly !!!! Maybe the Mechmate community should find maybe a normalized process to compare products like the gecko or others....like a benchmarking process .

I'm building the Mechmate house at the moment in the garden between two rains, we have a very bad summer in France this year !!.

Bye,

Pierre.
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  #6  
Old Wed 29 August 2007, 18:09
Marc Shlaes
Just call me: Marc
 
Cleveland, OH
United States of America
Send a message via Skype™ to Marc Shlaes
I looked at everything on the site it all looks very nice!
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  #7  
Old Thu 30 August 2007, 06:48
TECHLF
Just call me: Laurent
 
Toulouse
France
hi gerald,

transformer is a good solution for power supply, but when you use USB, you have some problems when you switch ON/OFF. With switching power supply you have a "soft start".

Laurent FOUGA
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