I did a job a while back that used 2 - 20 amp, 48 volt Meanwell switchers to drive four - Gecko G540 drives. I used two PCs with Mesa cards to control the Gecko G540s and didn't have any noise issues at all. We did the customary star ground installation and I used shielded cable between the Mesa cards and the Gecko G540s. The cabinet was very tight but we tried to keep the power lines away from the low voltage circuitry. It was a custom machine with 14 positioning axes that was powered by an onboard diesel generator (mobile railroad repair equipment). I would be very concerned if you need to put caps on the step and direction lines. That could easily degrade into an unreliable situation. Do you have a VFD in this machine?? I have had issues with VFDs creating noise problems on step and direction lines. To the point where I sometimes install them in a different cabinet. Some VFDs are incredibly noisy.
Dave Cole On 5/29/2013 11:32 AM, doug metzler wrote: > Thanks for the advice - I did order the antek, so I can compare it to the > switcher side-by-side. My main problem is actually with RF interference > from the stepper driver feeding back into the controller and confusing it. > A couple of caps on the step and direction lines cleaned it up but that's a > pretty iffy fix for a production run. > > So power ratings might not be an issue at all, but I wouldn't want to have > a net loss in available torque. > > I suppose it would be prudent to check the amount of current it's drawing > currently since the prototype machine is binding up and losing steps I > could get a good indication of max current. > > Thanks, > > DougM > > > > > On Wed, May 29, 2013 at 1:18 AM, Steve Blackmore<[email protected]> wrote: > > >> On Wed, 29 May 2013 07:35:23 +0200, you wrote: >> >> >>> Doug >>> I would not worry about the supply if I was you. The stepper motor >>> determines at what current you are running and we mostly run at far less >>> that the drive rating. The voltage will determine how fast you can go >>> but if you are happy with the max speed at 48v, you will be happy with >>> the Gecko drivers as is. >>> I suggest that you put the lot together and then test the system. At >>> that time you can decide if you want to change. I am willing to bet my >>> sandwiches that you wont notice a single difference at all. >>> >> My experience lately. >> >> My stepper driven router runs on 75V, I recently decided to try a servo >> on Z. Unfortunately it has a 60V continuous rating so I wrapped an >> external winding around the toroid to reduce down to 60V DC output. >> >> Before, all axis would run at 5m/min - after X&Y steppers would lock at >> anything over 3.8m/min so the servo came back off, as did the extra >> winding and it's back to 5m/min. >> >> >> Steve Blackmore >> -- >> >> >> ------------------------------------------------------------------------------ >> Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET >> Get 100% visibility into your production application - at no cost. >> Code-level diagnostics for performance bottlenecks with<2% overhead >> Download for free and get started troubleshooting in minutes. >> http://p.sf.net/sfu/appdyn_d2d_ap1 >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> > ------------------------------------------------------------------------------ > Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET > Get 100% visibility into your production application - at no cost. > Code-level diagnostics for performance bottlenecks with<2% overhead > Download for free and get started troubleshooting in minutes. > http://p.sf.net/sfu/appdyn_d2d_ap1 > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET Get 100% visibility into your production application - at no cost. Code-level diagnostics for performance bottlenecks with <2% overhead Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap1 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
