Re: [CAD_CAM_EDM_DRO] 4 axis Servo

Dan are you going to offer this for sale as a reseller for the Gecko? I am in a quandry because I want to use the Geckos but I
already have 2, 42 frame steppers that I got for free. I might try to sell those to offset the cost of a servo system. Haven't
decided yet.
Are these servos large enough for a full size mill conversion (9 by 39 Comet)?


Dan Mauch wrote:

> I put together a 4 axis servo system using the Gecko 320 servo amps. One of
> the features with the G320 is that the fault LED is inside the case. When
> installed in a enclosure the fault lights are not viewable. So I emailed
> Marriss and he sent me a suggested schematic circuit for an external LED
> circuit that can both reset the axis that Faulted and shut off the power to
> the motor. I uploaded some pictures of the PCB that I designed using
> Mariss's input. I modified it to add a LM-2675-5 switcher to provide +5 for
> the reset circuit and the Leds. You cannot use the existing circuits such as
> the encoder +5 because it will overload that part of the circuit.
> It uses a DPDT switch with center off. Flip the switch down (LEDS come on
> and circuit is reset) and the outputs to the motors go low allowing manual
> operation. Flip the switch up and and +5 is restored to the circuit. If what
> caused the fault is corrected the power to the servo motors will be restored
> in 5 seconds. Flip the switch to the middle position for normal operation.
> If at any time a servo faults that LED on the front panel will light. I
> posted a batch of pictures at www.metalworking.com. Look in the drop box
> under 4axisservo*.*
> Oh almost forgot that There are the pictures of the 4 axis servo system that
> I assembled. Salient features are:
> machined backpanel for IEC power , servo motor and encoder connectors, DB25
> junction board connector,+5 from PC and home, relays and limit switch
> connectors.
> The front panel has a lighted power switch, one LED for each axis and a
> reset/servo disengage switch.
> The case is 12X10X6 with a fan, LED fault reset circuit, 4 Gecko G320
> production series modules and three 24V 10 amp transformers in parallel as
> well as the power supply cap and rectifier.
> I tried to make the wiring as short as possible yet to leave room for
> adjusting the gain, dampening and current limiting.
> There was sure a lot of items to wire up. When I first did all the point to
> point wiring I miswired the power supply ground to the + 18-80 terminals.
> Before powering up each axis I double checked my wiring and found the
> problem. Whewwww!!!!
> I have 4 motors that are ~420 oz in torque with 200 count encoders.
> I bench ran everything yesterday and it runs great.
> Dan
>
>
> Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the discussion of shop built systems, for CAD, CAM, EDM, and DRO.
>
> Addresses:
> Post message: CAD_CAM_EDM_DRO@egroups.com
> Subscribe: CAD_CAM_EDM_DRO-subscribe@egroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@egroups.com
> List owner: CAD_CAM_EDM_DRO-owner@egroups.com, wanliker@...
> Moderator: jmelson@... [Moderator]
> URL to this page: http://www.egroups.com/group/CAD_CAM_EDM_DRO
> FAQ: http://www.ktmarketing.com/faq.html
> bill,
> List Manager