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Author Topic: Need help with Bridgeport Series One CNC Retro Fit  (Read 8329 times)

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Re: Need help with Bridgeport Series One CNC Retro Fit
« Reply #10 on: November 06, 2010, 10:27:44 PM »
Thanks Ray for the input. I have 33000uF and the problem is still there. I have emailed Gecko for more advice on these NEMA 42 steppers. :-\

Coke

Online BR549

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Re: Need help with Bridgeport Series One CNC Retro Fit
« Reply #11 on: November 06, 2010, 11:32:04 PM »
WHat is the voltage output of the power supply with the system idling no movement?

How about with XY running a zig zag pattern?

Have you tried setting up the drivers for the full 7amp output ?

(;-) TP

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Re: Need help with Bridgeport Series One CNC Retro Fit
« Reply #12 on: November 07, 2010, 12:04:27 AM »
My controller consists of  four Gecko 201's and my power supply is 30 amps at 36 volts FWTW. The filtering can be more, but, not enough is not good. As already stated proper amperage  is required.

A few tell tale signs are as follows.
IF the amps are too low the steppers won't move, if the amps are border line they will skip, if the amps are too high for the stepper
they will work fine until they get hot and then they can act very strange and unreliably. I get reminded of this since i switch different setting resistors depending on what machine my controller is used for.

You can lower amp requirements depending on how the motors are wired ( if its possible), but, then that's a trade off of stepper preformance.
But the 10 amp supply may still be marginal.

Do contact Gecko about the inductance isssue Hood brought up and reply back on what they said.


RICH

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Re: Need help with Bridgeport Series One CNC Retro Fit
« Reply #13 on: November 07, 2010, 12:16:03 AM »
There is a jumper block on the drive  ( need to remove the cover ) and there is a jumper that is specific to size 42 motors that should be in place.
RICH

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Re: Need help with Bridgeport Series One CNC Retro Fit
« Reply #14 on: November 07, 2010, 12:38:39 AM »
NOW there is an interesting idea HOW have you got the stock steppers wired.

If memory serves me there were several options depending on which motor BP used.
Re: Need help with Bridgeport Series One CNC Retro Fit
« Reply #15 on: November 08, 2010, 03:44:52 PM »
BR549,
Re: Need help with Bridgeport Series One CNC Retro Fit
« Reply #16 on: November 08, 2010, 08:29:27 PM »
The Bridgeport steppers can be very touchy about step pulse smoothness. You may have to go to a "Smooth Stepper".
Re: Need help with Bridgeport Series One CNC Retro Fit
« Reply #17 on: November 08, 2010, 11:35:50 PM »
BR549,
I don't know what happend to the rest of my last post but here is is again. Steppers are wired parallel the voltage reads 58.6 VDC at idle and around 58.3 or so at 70 IPM. Just for thought, Bridgeport set the steppers on BOSS 5 at 1/2 step pulse which ment that each pulse was .0005 of movement. This may be part of the reason that big NEMA 42 don't like micro steeping. (10000 pulse per inch is a lot of pulses)  I have emailed GECKO for some ansers.

Thanks
Coke
Re: Need help with Bridgeport Series One CNC Retro Fit
« Reply #18 on: November 09, 2010, 01:02:10 PM »
All of the Bridgeport steppers are full step. The ones that can get .0005 movement have a 2:1 belt drive. Those were usually a BOSS 6 or a series II mill.