If you decide to replace the motors then seriously consider fitting servos. It will probably work out slightly more expensive but the reliability and speed will be far better than steppers.
Les
Tim Goldstein wrote:
toggle quoted message
Show quoted text
Dan,
You will most likely want to replace the stock drives with something like
Gecko G201 units and a matching power supply. The stock drives are known for
failing and are very old full step or half step technology depending on the
specific version. The Geckos will greatly improve the reliability and
smoothness. You also need to make sure that the stepper motors are still
good. They are known for getting partially demagnetized when the drives
blow. You may want to consider just replacing the motors with some more
modern units. The old finned Bridgeport motors are very high inductance and
will restrict the rapid speed you can achieve. These machines give you great iron to work with and the ball screws and
mechanical set up would be very expensive to put on a mill yourself. But the
electronics and motors are mostly outdate and the mill will benefit greatly
from replacing them.
Tim Taig 2019CR mills in stock for immediate shipment with a discount off list. Taig products at Discount www.KTMarketing.com/order A2Z CNC www.A2ZCNC.com USA made accessories for desktop mills & lathes. Addresses: FAQ: FILES:
Post Messages: CAD_CAM_EDM_DRO@... Subscribe: CAD_CAM_EDM_DRO-subscribe@... Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@... List owner: CAD_CAM_EDM_DRO-owner@..., wanliker@..., timg@...
Moderator: pentam@... indigo_red@... davemucha@... [Moderators] URL to this group:
OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.
NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
bill
List Mom
List Owner
Yahoo! Groups Links
