Wed Sep 01, 2010 12:50 pm
#36300
Yes, it's a curious topic I know, & many thanks go to Stoney, who provided me with support when tackling a seemingly knackered drill.
Not much out there in terms of repair info, however if you can change the brushes, ...yes you can! then you are more than capable of opening the innards of your dremel & cleaning up / checking it's state of repair.
remember by opening it up you are probably invalidating your warranty, but hey...it's do or die!
Firstly have a look at this schematic.. THANKYOU STONEY!
http://www.ereplacementparts.com/dremel ... 15469.html
Keep it open in a separate window for referral.
.......................................................................................................
The Drill: "dremel" 300
Fault : DROPPED DREMEL, it flew across the room when trying out a non dremel rip saw blade, ..USE BOTH HANDS to steady & grip it.
Problem: Upon allowing the dremel to cool (it hit the floor & skidded full pace) I thought it was knackered, as the motor was imbalanced when motor engaged.
Diagnosis & end result: The drop caused the centrifugal motor to turn out of sync, transferring vibration outward & shakiness as a result! BAD
Repair fault: ONE minute
Yes that's right the motor casing is set up from the speed controller board via 4 little equally spaced "pegs" male & female connectors..
ALIGN & PUSH gently, get close & check all the pins insert at the same time. THIS IS PART 4 IN THE SINGULAR EXPLODED SCHEMATIC, WHICH PUSHES INTO PART 802 (GENTLY BUT FIRMLY)
FIXED!
However lets go back a bit as theres some info that will make this easier.
from the beginning.
seperate from mains, unplug it.. we are not going to do this with current flowing, theres no need, your hands will be all over the simple components as you tease them back into place.
1. Use the spanner (other end) to open slowly the circular brush access one at a time.
Catch the spring, your brush (black) might come out on the spring ,..it may not, so get ready to tip & catch!
repeat on ther brush.
2. Partly undo the 4 retaining screws which hold the body together.
3. Remove 1 at a time fully.
4. OPEN Top of body (speed control slider visible) partially from rear having taken the drill screw cap off or no movement whatsoever will occur!
5. Unclip hanger hook & undo the 2 retainer screws hoding the tiny circuit board in place.
6. watch out for a small semi circular spring clip & another piece lets call it the "stopper nub" from falling out ..basically it's the blue button stopper at the tip in two parts that seek the 2 holes to clamp the drill when you wish to change an accessory / drill bit.
7. IF required remove the rubber end cap (near the circuitry on a flywheel).
clean your dremel chassis with a wet wipe (not electricals, give the speed controller a blow out to remove dust etc.
Remove all components if you need to separate & re-seat there will be movement around the motor, this is good, & how it should be!
Reseat the drill tip, replace the rubber cap (by the circuitry) it should be snug, if it's hard you are doing it incorrectly, just pull everything out again,check movement & seating.
Re-assemble (a finger on the clip & stopper nub to keep them in place momentarily) ,
screws back together part way for all then tighten till resistance is felt.
set your speed controller (slider to off)
Re-insert brushes..they'll only go in one direction, no force needed.
Tighten with spanner.
Do not insert any accessories, we need to test it with no load on all speeds starting with LOW & increasing the speed if it appears back to normal smooth running without judders.
Plug in & turn on, ..should not have any more judders...
Carry on carving...
Amendment ..just found this dremel forum, not seen it before..
http://messageboard.dremel.com/
Not much out there in terms of repair info, however if you can change the brushes, ...yes you can! then you are more than capable of opening the innards of your dremel & cleaning up / checking it's state of repair.
remember by opening it up you are probably invalidating your warranty, but hey...it's do or die!
Firstly have a look at this schematic.. THANKYOU STONEY!
http://www.ereplacementparts.com/dremel ... 15469.html
Keep it open in a separate window for referral.
.......................................................................................................
The Drill: "dremel" 300
Fault : DROPPED DREMEL, it flew across the room when trying out a non dremel rip saw blade, ..USE BOTH HANDS to steady & grip it.
Problem: Upon allowing the dremel to cool (it hit the floor & skidded full pace) I thought it was knackered, as the motor was imbalanced when motor engaged.
Diagnosis & end result: The drop caused the centrifugal motor to turn out of sync, transferring vibration outward & shakiness as a result! BAD
Repair fault: ONE minute
Yes that's right the motor casing is set up from the speed controller board via 4 little equally spaced "pegs" male & female connectors..
ALIGN & PUSH gently, get close & check all the pins insert at the same time. THIS IS PART 4 IN THE SINGULAR EXPLODED SCHEMATIC, WHICH PUSHES INTO PART 802 (GENTLY BUT FIRMLY)
FIXED!
However lets go back a bit as theres some info that will make this easier.
from the beginning.
seperate from mains, unplug it.. we are not going to do this with current flowing, theres no need, your hands will be all over the simple components as you tease them back into place.
1. Use the spanner (other end) to open slowly the circular brush access one at a time.
Catch the spring, your brush (black) might come out on the spring ,..it may not, so get ready to tip & catch!
repeat on ther brush.
2. Partly undo the 4 retaining screws which hold the body together.
3. Remove 1 at a time fully.
4. OPEN Top of body (speed control slider visible) partially from rear having taken the drill screw cap off or no movement whatsoever will occur!
5. Unclip hanger hook & undo the 2 retainer screws hoding the tiny circuit board in place.
6. watch out for a small semi circular spring clip & another piece lets call it the "stopper nub" from falling out ..basically it's the blue button stopper at the tip in two parts that seek the 2 holes to clamp the drill when you wish to change an accessory / drill bit.
7. IF required remove the rubber end cap (near the circuitry on a flywheel).
clean your dremel chassis with a wet wipe (not electricals, give the speed controller a blow out to remove dust etc.
Remove all components if you need to separate & re-seat there will be movement around the motor, this is good, & how it should be!
Reseat the drill tip, replace the rubber cap (by the circuitry) it should be snug, if it's hard you are doing it incorrectly, just pull everything out again,check movement & seating.
Re-assemble (a finger on the clip & stopper nub to keep them in place momentarily) ,
screws back together part way for all then tighten till resistance is felt.
set your speed controller (slider to off)
Re-insert brushes..they'll only go in one direction, no force needed.
Tighten with spanner.
Do not insert any accessories, we need to test it with no load on all speeds starting with LOW & increasing the speed if it appears back to normal smooth running without judders.
Plug in & turn on, ..should not have any more judders...
Carry on carving...
Amendment ..just found this dremel forum, not seen it before..
http://messageboard.dremel.com/
Last edited by GUS on Wed Sep 01, 2010 3:44 pm, edited 1 time in total.
No, i'm not back.
(unlike Jonny)
(unlike Jonny)