1. Check your supplies
Prevent production interruption by making sure your team has what they need to get through the next few months. That includes nozzles, abrasive, abrasive hose, window shields and tune-up kits.
2. Check the PowderGate Nosepiece
PowderGate parts diagram
How to Check It and Replace It
Make sure your Comco blaster is ON but not blasting (footswitch is not pressed). Put your finger over the opening of the nozzle for a few seconds, then release it. If you feel or hear a burst of air exit the nozzle, that indicates a leaky nosepiece. Replace it immediately. The nosepiece is easily accessible from the side of the AccuFlo® without having to remove the cover of the unit. Contact Technical Support at email@example.com or 1-800-796-6626 if you have any questions about wear and replacement.
The Comco part number for the PowderGate Nosepiece is MB1653.
3. Check the Modulator
Watch for Low Flow
When a modulator is too worn to seal properly, the abrasive stream starts off strong but drops off to almost nothing within 3-5 seconds.
Listen for a Rattle (MicroBlaster® only)
In the MicroBlaster, a good modulator hums, and a worn modulator rattles.
Track Blast Hours
This is the most accurate way to manage modulator maintenance. The AccuFlo modulator has a lifespan of 5,000 blast hours; whereas, the modulator on the MicroBlaster, Powerflo® and DirectFlo™ last about 2,000 blast hours.
The Comco part numbers for each modulator:
- AccuFlo: MB2250-1 (115V) and MB2250-2 (230V)
- MicroBlaster: MB1301-2*
- PowerFlo/DirectFlo: PF2040*
*Housing assembly only; reuses the coil from existing modulator
4. Check the HEPA filter
HEPA filtration removes 99.97% of particles from the work chamber in the ProCenter Plus™ workstation. When the mallets can no longer knock spent abrasive from the filter surface, then the HEPA filter is full and needs to be replaced. HEPA filters tend to reach capacity after 6-9 months of regular use.
Replace every 3 months if…
If your blasting system runs all day and/or processes a high volume of parts, then replace the HEPA filter after 3 months of use. If you are blasting with abrasive that is smaller than 25-microns in size or if you are blasting with sodium bicarbonate, then you should also replace the filter after 3 months of use. Sodium bicarbonate breaks down into dust after blasting, and those extremely fine particles embed deep into filter pores.