magald Posted July 31, 2011 Report Share Posted July 31, 2011 I just bought the 20V Max compact combi drill (DCD785) and I really love the ergonomics and overall feel of it. The only problem is that it doesn't seem to work properly. The store already replaced the drill once and both drills have the same problem. When combining high torque settings/drill mode and low speed (first gear) the brake starts w/o any apparent reason. It forces the motor to stop/shut down, even with no load at all. I've never seen anything like it and both drills behave the exact same way. Any ideas? Link to comment Share on other sites More sharing options...
framer Posted July 31, 2011 Report Share Posted July 31, 2011 made in mexico? Link to comment Share on other sites More sharing options...
kanxrus Posted July 31, 2011 Report Share Posted July 31, 2011 More like China on the Compact..... It's not available here in the USA yet, so It's hard to know what's going on. Try this for me, put the transmission in 2nd, then pull and release the trigger slowly. Tell me if the brake engages pre-maturely. If it does engage pre-maturely, try holding your hand around the black clutch ring and try it again. Let me know if the brake stops engaging when you hold the clutch ring. Link to comment Share on other sites More sharing options...
magald Posted August 1, 2011 Author Report Share Posted August 1, 2011 More like China on the Compact..... It's not available here in the USA yet, so It's hard to know what's going on. Try this for me, put the transmission in 2nd, then pull and release the trigger slowly. Tell me if the brake engages pre-maturely. If it does engage pre-maturely, try holding your hand around the black clutch ring and try it again. Let me know if the brake stops engaging when you hold the clutch ring. It only happens at low speed in 1st gear combined with drill mode, no problems at all with any other setting or in 2nd gear. It feels like driving a car with the handbrake engaged. Also tried holding the clutch, no luck there. Link to comment Share on other sites More sharing options...
kanxrus Posted August 1, 2011 Report Share Posted August 1, 2011 Sound's like a programming glitch, I'd say exchange it again. Make sure you test it before you leave the store. Link to comment Share on other sites More sharing options...
Aprelia Posted August 3, 2011 Report Share Posted August 3, 2011 Sound's like a programming glitch, I'd say exchange it again. Make sure you test it before you leave the store. There is no "programming" in drill speed, there is a variable "slider" resistor that defines pulse width for PWM chip and then PWM chip drives a MOSFET that drives the motor. I think someone botched the design, or a batch of bad triggers. MAGALD, does it happen under load or not? Do you keep the trigger fully pressed? Link to comment Share on other sites More sharing options...
kanxrus Posted August 4, 2011 Report Share Posted August 4, 2011 Magald, I see you posted this video. You should have posted it on here. Link to comment Share on other sites More sharing options...
burlguy Posted August 4, 2011 Report Share Posted August 4, 2011 Magald, I see you posted this video. You should have posted it on here. Yep slide resistor is junk. Hopefully the trigger does not depress it in a way to cause lateral torque. Other wise the whole batch of them could be........ Link to comment Share on other sites More sharing options...
Aprelia Posted August 10, 2011 Report Share Posted August 10, 2011 Bad pot or bad mosfet. Link to comment Share on other sites More sharing options...
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